windynation
VertaMax
Power Inverter
PIN-1500-12
PIN-2500-12
User’s Manual
VertaMax User Manual
Revision 1.1
Table of Contents
1! Introduction ................................................................................................................................................... 3!
1.1! Features .............................................................................................................................................. 3!
1.2! Safety Information ............................................................................................................................... 4!
1.3! Specifications ...................................................................................................................................... 4!
1.3.1! Electrical Specifications .................................................................................................................. 4!
1.3.2! Physical Specifications ................................................................................................................... 4!
2! Installation .................................................................................................................................................... 4!
2.1! Electrostatic (ESD) Precautions ......................................................................................................... 5!
2.2! Mounting ............................................................................................................................................. 5!
2.3! Grounding ........................................................................................................................................... 5!
2.4! Connections ........................................................................................................................................ 5!
3! Operation ...................................................................................................................................................... 7!
3.1! Power .................................................................................................................................................. 7!
3.1.1! Power ON ....................................................................................................................................... 7!
3.1.2! Power OFF ...................................................................................................................................... 8!
3.1.3! Remote ON/OFF ............................................................................................................................. 8!
3.2! USB Port ............................................................................................................................................. 8!
3.3! Meter Readings................................................................................................................................... 8!
3.4! Protection – Alarms ............................................................................................................................ 8!
3.4.1! Over Input Voltage .......................................................................................................................... 8!
3.4.2! Low Input Voltage ........................................................................................................................... 9!
3.4.3! Power Overload .............................................................................................................................. 9!
3.4.4! Over Heating ................................................................................................................................... 9!
3.4.5! Short Circuit .................................................................................................................................... 9!
3.4.6! Functional Matrix............................................................................................................................. 9!
4! Application .................................................................................................................................................... 9!
4.1! Power Consumption ........................................................................................................................... 9!
4.2! Typical Power Consumption ............................................................................................................. 10!
4.3! Wire Gauge Reference ..................................................................................................................... 10!
4.3.1! Ampacity Table ............................................................................................................................. 10!
4.3.2! Wire Thickness ............................................................................................................................. 11!
4.4! Batteries ............................................................................................................................................ 11!
4.4.1! Battery Life .................................................................................................................................... 11!
4.4.2! Actual Battery Current Draw ......................................................................................................... 11!
4.4.3! Battery Capacity ............................................................................................................................ 12!
5! Troubleshooting And Support ..................................................................................................................... 12!
5.1! Maintenance & Care ......................................................................................................................... 12!
5.2! Fuse Replacement ............................................................................................................................ 12!
5.3! Troubleshooting ................................................................................................................................ 13!
5.4! Support ............................................................................................................................................. 14!
5.5! Warranty ........................................................................................................................................... 14!
5.5.1! Restrictions ................................................................................................................................... 14!
5.5.2! Warranty Claims & Return Procedures......................................................................................... 14!
5.5.3! Disclaimer ..................................................................................................................................... 15!
5.5.4! Limitation of Liability...................................................................................................................... 15!
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VertaMax User Manual
1
Fault LED
6
AC Outlets [x3]
2
Power LED
7
Digital Display Meter
3
ON/OFF Switch
8
DC Positive (+) Input [x2]
4
USB Outlet*
9
Cooling Fan
5
Grounding Terminal
10
DC Negative (-) Input [x2]
Revision 1.0
1 INTRODUCTION
The VertaMax Power Inverter is a highly reliable product that uses advanced technologies for high
performance and stability. The VertaMax efficiently converts DC power from your vehicle, boat, or directly
from a dedicated 12V DC battery, into 120V AC power that is commonly used in a wide variety of household
AC items, such as computers, mobile phone chargers, radio, TV etc.
The VertaMax works in two stages: During the first stage, the DC to DC converter increases the DC input
voltage from the power source (e.g. 12V battery) to 300VDC. In the second stage, this high voltage DC is
converted into a modified sine wave AC output using advanced power MOSFET transistors or IGBT
technology in a full bridge configuration. The result is excellent overload protection and capacity to operate
different reactive loads.
The Inverter may be used for many different applications including Solar (PV) battery systems, Wind Turbine
battery systems, Recreational Vehicles, Boats, etc.
Please read this manual carefully before installing or using the inverter and keep it for future reference.
1.1 FEATURES
9 Microprocessor Based PWM (Pulse Width Modulation) Operation
9 Three AC Receptacles
9 Soft Start
9 Power On/OFF Switch and LED indicator
9 Remote On/Off Capability
9 Voltage and Power Meter
9 Automatic Overload Protection
9 Low Voltage Shutdown Battery Protection
9 Short Circuit Protection
9 High Temperature Protection
9 Fused Reverse Polarity Protection
* If covered, the port is not functional and should not be used
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VertaMax User Manual
Parameter
PIN-1500-12
PIN-2500-12
Continuous Rated Power
1500 Watts
2500 Watts
Peak Surge Power
3000 Watts
5000 Watts
Input Voltage (Nominal)
12VDC
12VDC
Input Voltage (Min – Max)
10 – 16VDC
10 – 16VDC
Output Voltage (Nominal)
120VAC
120VAC
USB Output Voltage*
5VDC
5VDC
Output Frequency (Nominal)
60 Hz
60 Hz
Output Waveform
Modified Sine Wave
Modified Sine Wave
Parameter
Value
Dimension (H x W x D)
5.06” (129mm) x 11.5” (292mm) x 6.56” (167mm)
Unit Weight
8.6 lb. (3.9kg)
Cooling
Powered Fan
Operating Temperature
0oC to 60oC
Storage Temperature
-25oC to 70oC
Operating Humidity
20 to 80% relative humidity (non-condensing)
Non-Operating Humidity
Greater than 95% relative humidity
38.7oC max wet bulb temperature with no damage
Revision 1.1
1.2 SAFETY INFORMATION
Please read the installation and operating instructions carefully prior to use. Pay special attention to the
IMPORTANT and WARNING statements in the manual.
WARNING:
The VertaMax produces the same potentially lethal AC power as normal household outlets. It is suggested
that you treat it with the same precautions as a normal 120 VAC outlet.
Do not operate the VertaMax near flammable fumes or gases, such as in the cabin of a gasoline powerboat,
or near propane tanks.
Never work or service the AC wiring without disconnecting the DC Input connections.
Do not connect or disconnect batteries while the Inverter is operating from the battery supply. Dangerous
arcing may result.
1.3 SPECIFICATIONS
1.3.1 Electrical Specifications
1.3.2 Physical Specifications
* If equipped
2 INSTALLATION
¾ Insure all terminating connections are clean and tight to prevent arcing and overheating.
¾ The VertaMax must be installed in an area that satisfies all of the following conditions:
1. Dry: Avoid any location where water can contact the inverter
2. Cool: Ambient air temperature between 30°F and 105°F (0°C and 40°C)
3. Ventilated: Allow at least 6 in (150 mm) of clearance above and below and at least 1 in (25 mm)
on each side for proper air flow.
4. Safe: Do not operate in a shared compartment with batteries or any flammable substances,
(e.g.: gasoline)
IMPORTANT: To avoid fire, do not cover or obstruct ventilation openings.
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2.1 ELECTROSTATIC (ESD) PRECAUTIONS
All electronic circuits may be damaged by static electricity. To minimize the likelihood of electrostatic
damage, discharge yourself by touching an electrical ground (e.g.: copper pipe) prior to handling the unit and
avoid touching components on the circuit boards. The risk of electrostatic damage is highest when relative
humidity is below 40%.
2.2 MOUNTING
Mounting is optional for the VertaMax; however, the environment must be dry and protected from water.
1. The VertaMax can be mounted on a vertical or horizontal surface. If mounted vertically, the unit
should be oriented such that neither end is at the top so foreign material cannot settle into the
unit.
2. Install four user-supplied fasteners through the four inverter mounting slots and into the
mounting surface.
3. Tighten all the fasteners to ensure the inverter cannot slide in any direction.
WARNING: Do not mount on flammable surface material.
2.3 GROUNDING
The VertaMax is designed to work with grounded electrical systems. In the inverter, ground is not connected
to the input terminals.
Use a copper wire to connect the grounding terminal on the VertaMax enclosure to earth ground or chassis
ground. The grounding terminal is located on the AC Output end of the inverter.
Do not connect the system negative conductor to this terminal. NEC requires the use of an external ground
fault protection device (GFPD). The system electrical negative should be bonded through a GFPD to earth
ground at one (and only one) location. The grounding point may be located in the solar/wind circuit or the
battery circuit.
2.4 CONNECTIONS
WARNING: Electrical installations must meet local and national wiring codes, and should be performed by a
qualified electrician.
WARNING: Do not connect the inverter and another AC source (such as a generator or utility power) to the
AC wiring at the same time.
WARNING: Do not connect the inverter to an AC branch circuit that has high-power consumption loads. It
will not operate electrical appliances that consume more than the units rated watts.
WARNING: Loose connectors result in excessive voltage drop and may cause over heated wires and melted
insulation, which can lead to electrical fires.
WARNING: Reverse polarity connections (positive to negative) will blow internal fuses in the inverter and
may permanently damage the Inverter.
IMPORTANT: The NEC requires that the wires carrying the system current never exceed 80% of the
conductor’s current rating (sizing recommendations are located in Section 4).
IMPORTANT: In addition to the protection provided by the Inverter’s internal fuses, NEC requires a UL-listed
fuse in the battery’s positive DC cable as close to the battery as possible (sizing recommendations are
located in Section 4).
1) The VertaMax has four DC terminals (two positive and two negative) to share the load. Both positive
terminals are internally bonded and both negative terminals are also internally bonded. The four cables
used for these terminals should be of equal length.
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IMPORTANT: For 1500 Watt units, use a minimum of 6 AWG wire with a wire length not to exceed 6 feet*;
using all four battery posts on the inverter.
IMPORTANT: For 2500 Watt units, use a minimum of 2 AWG wire with a wire length not to exceed 6 feet*;
using all four battery posts on the inverter.
* For wire runs longer than 6 feet, consult a Wire Gauge Chart to safely determine what gauge of wire will be
needed.
2) Prepare Cables to connect the power source to the inverter (not included). The cables should be as short
and thick as possible to reduce the voltage drop between the power source and the inverter as it draws
current from the power source.
a) Inverter end of the cable: Terminate copper wire with a 0.330” diameter, tin-plated copper lug. It is
recommended to cover the lug barrel with 1 inch of heat shrink tubing.
b) Power Source end of the cable: Terminated with a lug or other connector that provides a secure, low
resistance connection. For example, if the power source is a battery, the cable must be terminated
with a battery terminal that clamps to the post on the battery.
IMPORTANT: If there is an excessive voltage drop and the voltage at the inverter drops below 10 volts,
the inverter will shut down.
3) Wire the positive cable(s) through user-supplied UL-listed fuse (e.g. Buss Fuse ANL-250 or equivalent)
as shown below. The fuse should be as close to the battery as possible. The specific fuse ampere rating
should be sized to allow operation of all your DC powered equipment but cannot exceed the maximum
current (amp) rating of the inverter by more than 40%.
4) Be sure the inverter power button is in the ‘OFF’ position and the DC Power source is also off.
5) Connect the cable end with the 0.330” lug to the Power Input Terminals on the DC Input end of the
inverter as shown below. The red terminal is positive (+) and the black terminal is negative (-).
Use M8 Washers (provided) as needed to ensure the threaded end cap is fully tightened and the Cable
Lug is secured.
IMPORTANT: When fully tightened, the Cable Lug should not be able to rotate around the Inverter
connection post. Check and tighten the end caps periodically as they can become loose from vibrations
or thermal cycling.
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6) Connect cables to the power source:
a) Connect the cable from the Negative (Black) Terminal(s) of inverter to the Negative Terminal of the
power source; ensure a secure connection.
b) Connect the cable from the Positive (Red) Terminal(s) of the inverter to the Positive Terminal of the
power source (the battery’s main fuse or the battery selector switch, if you are using one) ; ensure a
secure connection.
WARNING: If you are making a permanent AC connection to the inverter, make sure that the AC wiring is
performed before any DC wiring is done. (DC hook-up may energize internal components and create an
electrical shock hazard).
3 OPERATION
3.1 POWER
The VertaMax features a Soft Start to handle the power surge that is created when some appliances are
turned on. This feature helps protect both the appliance and the inverter from excessive power draws and
surges.
When the power switch is turned on, the VertaMax Soft Start will smoothly bring up the AC power. The Soft
Start circuitry also activates under excessive loads and short circuits, to quickly turn off power to protect the
device and the inverter. Soft Start will attempt to smoothly bring up the AC power, unless it detects an
excessive load.
3.1.1 Power ON
Ensure the VertaMax is properly installed and connected as shown in Section 2 and ensure the DC Power
Source is ON (if switched).
From the AC Output end of the inverter, switch the rocker power switch up to the ON position. The green
power indicator will light and the VertaMax will now deliver AC power to the outlet(s) on the AC Output end of
the inverter.
Plug the AC product(s) you wish to operate into the AC outlet(s) and switch them on, one at a time.
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IMPORTANT: Do not turn on all AC products at the same time and turn on the larger power product first.
IMPORTANT: In the ON position, even if no loads are connected, there is a low current draw (<600mA).
3.1.2 Power OFF
From the AC Output end of the inverter, switch the rocker power switch down to the OFF position to shut
down the Inverter completely, preventing it from drawing power from the batteries. The green power indicator
will go out.
This will also “reset” the unit if it shuts down due to low battery or overload.
3.1.3 Remote ON/OFF
The VertaMax comes supplied with a remote control that will allow you to turn the power inverter ON or OFF
from a remote location when the inverter is installed in an out of reach location.
To remotely control the power function of the inverter, switch the rocker power switch down to the OFF
position, essentially shutting down the Inverter. From the Remote Control press the “ON” button to turn the
inverter on and the “OFF” button to turn the power off.
IMPORTANT: Although the main power rocker switch will be in the OFF position, the green power indicator
will work as normal operation and will light when the VertaMax is remotely “ON”.
3.2 USB PORT
The USB outlet, if equipped, will supply 5 volts at 500ma to charge and power cell phones, MP3 Players, and
other small electronics. It will NOT transmit or receive any data and is only used to supply power to a USB
powered device.
IMPORTANT: Although the USB port may be present on all models, it may not be wired and equipped for
use. In these cases, a cover will be present on the port and should NOT be removed for use.
3.3 METER READINGS
The VertaMax is equipped with a digital meter on the AC Output End of the unit. The meter will cycle through
three Input and Output values in three-second intervals as follows:
1) AC LOAD VOLTAGE: The voltage of the AC OUTPUT; shown in Volts AC
2) AC POWER: The output power; shown in Watts
3) DC BATTERY VOLTAGE: The voltage of the DC INPUT; shown in Volts DC
3.4 PROTECTION – ALARMS
The VertaMax has several protection features to protect itself as well as your electrical system.
3.4.1 Over Input Voltage
When the 12V DC INPUT power voltage exceeds 16V DC, the inverter will automatically shut down.
IMPORTANT: Although the inverter incorporates fused protection against over-voltage, it is still possible to
damage the unit when the input voltage exceeds 16V DC.
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VertaMax User Manual
Power
Switch
Power
Light
Audible
Alarm
Fan
Fault
Light
Operational Mode
Off
Off
Off
Off
Off
Unit is off
On
On
Off
On
Off
Normal Operation
On
On
On
On
Off
Low input voltage, 11V
On
On
On
On
On
Low input voltage, < 10.2V
On
On
Off
On
On
High Input voltage, > 16V
On
On
Off
On
On
Over temperature or overload
On
Off
Off
Off
Off
No 12V DC input
Revision 1.0
3.4.2 Low Input Voltage
As a battery is used, its voltage begins to decrease. When the inverter senses that the voltage at its DC input
has dropped to 11V ± 0.3 DC, an audible alarm sounds and the red FAULT indicator will light. When this
happens, it is important to remove or shut down computers or other sensitive devices that may be connected
to the VertaMax and recharge the battery before its capacity drops too low. The inverter can operate while
the battery is recharging.
When the input voltage rises to approximately 11.3 – 11.9V DC, the inverter restores to normal operation and
the red FAULT indicator will turn off.
If the audible alarm is ignored, the inverter will automatically shut down when the voltage drops to the range
of 9.8 - 10.2V DC. This protects the battery from being over-discharged.
3.4.3 Power Overload
When the starting power exceeds the rated surge power or the AC appliances connected to the VertaMax
exceed the inverters power rating, the inverter will automatically shut down and the red FAULT indicator will
light.
When in over current protection mode, the inverter cannot automatically restore to normal operation; reset to
normal operation by using the manual power switch.
3.4.4 Over Heating
When the inverter exceeds a safe operating temperature, due to insufficient ventilation or an increase of
ambient temperature, the inverter will automatically shut down, an audible alarm sounds and the red FAULT
indicator will light.
When the internal temperature drops below the surrounding air temperature, the inverter will automatically
return to normal operation.
Important: The cooling fan is designed to operate when the temperature increases but may not be adequate
enough to prevent overheating.
3.4.5 Short Circuit
This inverter is equipped with multiple internal fuses. When in a short circuit state, the inverter will
automatically shut down.
Important: Please see Section 5 Troubleshooting and Support for Fuse replacement instructions
3.4.6 Functional Matrix
4 APPLICATION
4.1 POWER CONSUMPTION
For each piece of equipment you will be operating from the inverter, you must determine the battery’s
reserve capacity (how long the battery can deliver a specific amount of current – in automotive batteries,
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Appliance
Watts
Appliance
Watts
Stereo
200
Microwave - 1000 W
1000
Table Fan
200
AC (5,000 BTU)
700
TV-VCR
250
Computer
300
Small Refrigerator
350
Hair Dryer
1000
Hand Drill - 1/2"
600
Coffee Maker
1200
Light Bulb - 100 W
100
Blender
400
Load Amperage – Power @ 12VDC
10A
120W
20A
240W
30A
360W
40A
480W
50A
600W
60A
720W
70A
840W
80A
960W
100A
1200W
120A
1440W
160A
1920W
200A
2400W
250A
3000W
Cable Length (feet)
2
4
6
8
10
12
16
20
24
28
33
42
1
Revision 1.1
usually 25 ampere) or ampere-hour capacity (a measure of how many amperes a battery can deliver for a
specified length of time).
Example – Reserve capacity: a battery with a reserve capacity of 180 minutes can deliver 25 ampere for 180
minutes before it is completely discharged.
Example – Ampere-hour capacity: a battery with an ampere-hour capacity of 100 ampere-hours can deliver
5 ampere for 20 hours before it is completely discharged.
To determine the battery ampere-hour capacity:
1) Determine how many watts each piece of AC equipment (TV, light bulbs, etc) consumes. This can
normally be found on the product label. If only the current draw is given, multiply the current draw by
115 to get the watt consumption.
2) Estimate the time (in hours) that each piece of equipment will be running between battery charging
cycles.
3) Calculate the total watt-hours of energy consumption (power in Watts x operating time in hours)
using the average power consumption and the total estimated running time (in hours). Power x
Operating Time = Watt-Hours.
4) Divide the watt-hours by 10 to determine how many battery (12 volt) ampere-hours will be
consumed.
4.2 TYPICAL POWER CONSUMPTION
4.3 WIRE GAUGE REFERENCE
4.3.1 Ampacity Table
16AWG 16AWG 14AWG 12AWG 10AWG 8AWG 8AWG 6AWG 4AWG 2AWG 2AWG 2/0AWG 3/0AWG
16AWG 16AWG 14AWG 12AWG 10AWG 8AWG 6AWG 6AWG 4AWG 2AWG 1AWG 2/0AWG 4/0AWG
16AWG 14AWG 12AWG 10AWG 8AWG 6AWG 6AWG 4AWG 2AWG 2AWG 1/0AWG 3/0AWG 4/0AWG
16AWG 14AWG 12AWG 10AWG 8AWG 6AWG 6AWG 4AWG 2AWG 2AWG 1/0AWG 3/0AWG 4/0AWG
16AWG 14AWG 12AWG 10AWG 8AWG 6AWG 6AWG 4AWG 2AWG 2AWG 1/0AWG 3/0AWG 4/0AWG
14AWG 14AWG 12AWG 10AWG 8AWG 6AWG 6AWG 4AWG 2AWG 2AWG 1/0AWG 3/0AWG 4/0AWG
14AWG 12AWG 12AWG 10AWG 8AWG 6AWG 6AWG 4AWG 2AWG 2AWG 1/0AWG 3/0AWG 4/0AWG
14AWG 12AWG 10AWG 8AWG 6AWG 6AWG 4AWG 4AWG 2AWG 2AW G 2/0AWG 4/0AWG 4/0AWG
12AWG 12AWG 10AWG 8AWG 6AWG 4AWG 4AWG 2AWG 1AWG 1AW G 2/0AWG 4/0AWG 4/0AWG
12AWG 10AWG 8AWG 8AWG 6AWG 4AWG 4AWG 2AWG 1AW G 1AWG 2/0AWG 4/0AWG 4/0AWG
10AWG 10AWG 8AWG 6AWG 4AWG 4AWG 4AWG 2AWG 1AW G 1AWG 2/0AWG 4/0AWG 4/0AWG
10AWG 8AWG 6AWG 6AWG 4AWG 4AWG 2AWG 1AW G 1/0AWG
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/0AWG 3/0AWG 4/0AWG NR
VertaMax User Manual
50
1
AWG
Diameter
inches (mm)
Ohms per
1000ft
Break
Force
Square
mm2
14
0.064 (1.63)
2.525
119 lbs
2.08
10
0.102 (2.59)
0.999
314 lbs
5.26
6
0.162 (4.11)
0.395
760 lbs
13.30
2
0.258 (6.54)
0.156
1930 lbs
33.62
0 (1/0)
0.325 (8.25)
0.098
3060 lbs
53.49
000 (3/0)
0.410 (10.4)
0.062
4860 lbs
85.01
Power Usage
Current @ 12V
50A/h Battery
Operating Time
100A/h Battery
Operating Time
100 watt
9 Amps
5.5 hours
11 hours
200 watt
19 Amps
2.6 hours
5.2 hours
500 watt
47 Amps
1 hour
2 hours
Revision 1.0
8AWG 6AWG 6AWG 4AWG 4AWG 2AWG 2AWG 1AWG 1/0AWG
NOTE: Applicable to conductors: Rated 0 Through 2000 Volts with an ambient Temperature of 30°C (86°F)
IMPORTANT: The ampacity table is for a single cable. The VertaMax uses a dual cable connection so
reference the wire thickness table to establish a single cable or a dual cable solution that will provide an
equal conductor thickness.
4.3.2 Wire Thickness
16 0.051 (1.29) 4.016 75 lbs 1.30
12 0.081 (2.05) 1.588 197 lbs 3.30
8 0.129 (3.26) 0.628 480 lbs 8.30
4 0.204 (5.19) 0.249 1210 lbs 21.15
1 0.289 (7.35) 0.124 2430 lbs 42.41
/0AWG 3/0AWG NR NR
00 (2/0) 0.365 (9.27) 0.078 3860 lbs 67.43
0000 (4/0) 0.460 (11.68) 0.049 6120 lbs 107.22
4.4 BATTERIES
4.4.1 Battery Life
The VertaMax can draw lots of amps from your battery when operating. If you are using it for extended
periods of time, you will want to recharge occasionally to maintain the charge in the battery. In addition, the
power inverter will also draw a small current, less than 600mA, when turned off and not operating. Therefore,
it should be disconnected from your battery if it will not be used for more than a day. The following chart
shows typical operation time for typical batteries for various loads.
*All Values are approximate
4.4.2 Actual Battery Current Draw
Approximate 12 volt current draw is the load in watts divided by 10. Thus a 60 watt light bulb plugged into the
inverter will cause the inverter to draw 6 amps (60 / 10 = 6) from the 12 volt power supply (e.g. battery).
Batteries are rated in several different ways:
x Peak cranking amps - This has little to do with how long an inverter can supply power, so it is not a
useful number for inverter operation.
x Battery reserve capacity - This number shows how long a battery can supply a given current,
typically 25 amps, before the battery voltage reaches a low voltage. Therefore, a battery rated at 200
minutes reserve can deliver 25 amps for 200 minutes before it is discharged. Ampere-hour capacity This rating indicates how many amps a battery can deliver over a period of time, typically 20 hours.
Therefore, a 100 amp-hour battery can deliver 5 amps for 20 hours (5 x 20 = 100).
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Actual operating time from a battery will depend upon the current draw from the battery. A battery will deliver
less total power (energy) as you draw higher amps. A 100 amp-hour battery can deliver 5 amps for 20 hours
(100 amp-hours) but it will only deliver 50 amps for 1 1/2 hours (50 x 1.5 = 75) or 75 amp-hours at the higher
rate.
Also remember, battery life is decreased if the battery is discharged fully. Lead acid batteries have the
longest life, if they are kept fully charged.
4.4.3 Battery Capacity
Select a battery or system of batteries that will provide your Inverter with proper DC voltage and an adequate
amp-hour capacity to power your application. Even though VertaMax Inverters are highly efficient at DC-toAC inversion, their rated output capacities are limited by the total amp-hour capacity of connected batteries
and the support of charging devices connected to the battery (e.g. a vehicle alternator, solar panel, wind
turbine, battery charger).
STEP 1: Determine Total Wattage Required
Add the wattage ratings of all equipment you will connect to your Inverter. Wattage ratings are usually listed
in equipment manuals or on nameplates. If your equipment is rated in amps, multiply that number times AC
utility voltage to determine watts. (Example: a ¼ in. drill requires 2½ amps. 2½ amps × 120 volts = 300
watts.)
Note: Your Inverter will operate at higher efficiencies when used at about 75% - 80% of the inverter’s rating.
STEP 2: Determine DC Battery Amps Required
Divide the total wattage required (from step 1, above) by the battery voltage (12) to determine the DC amps
required.
STEP 3: Estimate Battery Amp-Hours Required
Multiply the DC amps required (from step 2, above) by the number of hours you estimate you will operate
your equipment exclusively from battery power before you have to recharge your batteries. Compensate for
inefficiency and wiring losses by multiplying this number by 1.2. This will give you a rough estimate of how
many amp-hours of battery power (from one or several batteries) you should connect to your Inverter.
NOTE: Battery amp-hour ratings are usually given for a 20-hour discharge rate. Actual amp-hour capacities
are less when batteries are discharged at faster rates. For example, batteries discharged in 55 minutes
provide only 50% of their listed amp-hour ratings, while batteries discharged in 9 minutes provide as little as
30% of their amp-hour ratings.
You must allow your batteries to recharge long enough to replace the charge lost during Inverter operation or
else you will eventually run down your batteries.
5 TROUBLESHOOTING AND SUPPORT
The VertaMax is ruggedly constructed and requires minimal care. It is recommended to inspect all the
connections at least two times per year for insulation damage or corrosion and to ensure all connections are
tight and secure.
5.1 MAINTENANCE & CARE
Clean the heat sink and area around the controller of any dirt or debris with a moistened cloth.
Tighten the screws on the DC input terminals. Be sure vents and fans are free of dust or debris.
Inspect any batteries for cracked or bulging cases and corroded terminals.
5.2 FUSE REPLACEMENT
Warning: Be sure all AC and DC connections are removed and the unit is powered off
Important: Do not attempt to replace the fuses if you are not comfortable with electronic devices.
Important: ESD Precautions must be observed as stated in Section 2.1
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Problem
CAUSE
Possible Remedies
Battery is defective
Replace battery
Blown fuse
Determine cause for fuse blowing and then
replace fuse
Loose cable connections
Check connections and tighten as necessary
Unit operates for a
turns off
Load is trying to draw too much
Be sure load is less than rated watts of inverter.
back on to reset.
Low voltage
Shorten battery cables or use thicker battery
cables. Recharge battery.
Over Temperature Protection
Allow unit to cool. Improve air circulation around
load if continuous operation is required
Overload
Reduce load or use a larger inverter
Bad Connections
Check all connections and tighten as needed.
Modified sine waves may read
incorrectly on typical multi-meters
Inverter’s “modified sine wave” output requires
“true RMS” voltmeter for accurate measurements
Battery voltage is too low
Recharge battery
Over load
Reduce the load
Revision 1.0
1) Remove the four screws located on the DC INPUT end of the inverter as shown below.
2) Carefully Remove the end cover to expose the inside of the inverter
3) Locate the fuse sockets as shown below and remove each fuse by pulling it up and out from the
socket.
4) Replace the fuse with the spare fuses provided.
5) Replace the end cover and the four screws that were removed in step 1.
5.3 TROUBLESHOOTING
No Power, No Indicator
short period and then
current
Alarm sounds.
Measured inverter
output voltage is too
low.
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Remove excessive load. Turn inverter off and
unit. Locate unit to a cooler environment. Reduce
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AC product’s power consumption is
higher than rated
Use a larger battery to make up for increased
power requirement
Battery is old or defective
Replace battery.
Battery is not being properly
charged
Some chargers are not able to fully recharge a
battery. Make sure you use a powerful charger.
Power dissipation in DC cables.
Use shorter/thicker DC cables.
Audio/Video interference.
Reposition equipment antennas and Inverter.
cables and reorient as necessary.
Revision 1.1
Battery run time is less
than expected
Television and/or
stereo interference
Position the power inverter and wiring as far as
possible from electronic equipment, antenna and
5.4 SUPPORT
If you are experiencing technical problems, and cannot find a solution in this manual, you can contact Windy
Nation Inc. for further assistance.
x Call: (805) 323-6445
x Email: info@windynation.com
x Write: 398 South Kalorama Street, Unit C, Ventura, CA 93001
For challenging issues or to just ask a question, consider using our FREE Community Forums! Consult our
community of DIY'ers for fast answers to all your questions.
Post on our Forums: http://www.windynation.com/community/
5.5 WARRANTY
Windy Nation warrants that the Power Inverter (the “Product”), will be free from manufacturing defects in
materials and workmanship under normal authorized use consistent with product instructions for a period of
one (1) year from the date the original purchaser (“Customer”) receives the Product (the “Warranty Period”).
This warranty extends only to the original purchaser. The Customer’s sole and exclusive remedy and the
entire liability of Windy Nation, its suppliers and affiliates for breach of the warranty is, at Windy Nation’s
option, either (i) to replace the Product (or defective component part(s)) with a new or reconditioned Product
(or component part(s)); (ii) to repair the reported problem; or (iii) to refund the purchase price of the Product.
Repaired or replaced products are warranted for the remainder of the original warranty period only. No
employee, agent, dealer or other person is authorized to give any warranties on behalf of Windy Nation not
expressly set forth in this limited warranty.
5.5.1 Restrictions
No warranty will apply if the Product (i) has been altered or modified except by Windy Nation; (ii) has not
been installed, operated, repaired, or maintained in accordance with instructions supplied by Windy Nation;
(iii) has been subjected to abnormal physical, thermal or electrical stress, misuse, negligence, or accident. If
Windy Nation determines that the problem with the Product is not due to a manufacturing defect in Windy
Nation’s workmanship or materials, or otherwise does not qualify for warranty repair, then the Customer will
be responsible for the costs of all necessary repairs and expenses incurred by Windy Nation.
5.5.2 Warranty Claims & Return Procedures
To be eligible for service under this warranty, the Customer must submit a service request within the
Warranty Period by contacting Windy Nation in writing or via telephone and obtaining a Returned Materials
Authorization (“RMA”) number. This RMA must be obtained before returning any product under this warranty.
Notification must include a description of the alleged defect, the manner in which the Product was used, the
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Revision 1.0
serial number, and the original purchase date in addition to the name, address, and telephone number of the
Customer. Within five (5) business days of the date of notification, Windy Nation will provide the Customer
with an RMA number and the location to which the Customer must return the defective Product. Any Product
returned for warranty service shall be shipped at the expense and risk of the Customer. The Customer must
return the entire Product kit (or, if authorized by Windy Nation, the defective component parts), within fifteen
(15) days after issuance of the RMA number. Windy Nation will be under no obligation to accept any returned
Product that does not have a valid RMA number. Customer’s failure to return the Product within fifteen (15)
days of its receipt of an RMA number may result in cancellation of the RMA. All parts that Windy Nation
replaces shall become Windy Nation’s property on the date Windy Nation ships the repaired Product or part
back to the Customer. Windy Nation will use all reasonable efforts within thirty (30) days of receipt of the
defective Product to repair or replace such Product. If a warranty claim is invalid for any reason, the
Customer will be charged at Windy Nation’s then-current rates for services performed and will be charged for
all necessary repairs and expense incurred by Windy Nation. If Windy Nation determines that a warranty
claim is valid, it will ship the repaired or replaced Product to Customer at Windy Nation’s cost.
5.5.3 Disclaimer
EXCEPT FOR THE EXPRESS LIMITED WARRANTY SET FORTH IN THE PREVIOUS PARAGRAPH,
WINDY NATION DISCLAIMS ALL WARRANTIES, EXPRESS, IMPLIED AND STATUTORY INCLUDING,
WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE WITH RESPECT TO ANY PRODUCTS PROVIDED BY WINDY NATION. NO
ORAL OR WRITTEN INFORMATION OR ADVICE GIVEN BY WINDY NATION, ITS DEALERS,
DISTRIBUTORS, AGENTS OR EMPLOYEES SHALL IN ANY WAY INCREASE THE SCOPE OF THIS
WARRANTY. WINDY NATION DOES NOT WARRANT THAT THE QUALITY OR PERFORMANCE OF THE
PRODUCTS WILL MEET YOUR REQUIREMENTS OR THAT YOU WILL BE ABLE TO ACHIEVE ANY
PARTICULAR RESULTS FROM USE OR MODIFICATION OF THE PRODUCTS. Some jurisdictions do not
allow the limitation or exclusion of implied warranties or how long an implied warranty may last, so the above
limitations may not apply to you. In any such jurisdiction, the warranty shall be limited to the minimum
warranty and period required by law.
WINDY NATION EXPRESSLY DISCLAIMS ALL LIABILITY FOR BODILY INJURIES OR DEATH THAT MAY
OCCUR, DIRECTLY OR INDIRECTLY, BY USE OF THE PRODUCT BY ANY PERSON.
5.5.4 Limitation of Liability
UNDER NO CIRCUMSTANCES WILL WINDY NATION OR ITS AFFILIATES OR SUPPLIERS BE LIABLE
OR RESPONSIBLE FOR ANY LOSS OF USE, INTERRUPTION OF BUSINESS, LOST PROFITS, LOST
DATA, OR INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OF ANY KIND
REGARDLESS OF THE FORM OF ACTION, WHETHER IN CONTRACT, TORT (INCLUDING
NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF WINDY NATION OR ITS AFFILIATE OR
SUPPLIER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Some states do not allow the exclusion or limitation of incidental or consequential damages, so these
limitations may not apply to you. Neither Windy Nation nor its affiliates or suppliers will be held liable or
responsible for any damage or loss to any items or products connected to, powered by or otherwise attached
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to the Product. The total cumulative liability to Customer, from all causes of action and all theories of liability,
will be limited to and will not exceed the purchase price of the Product paid by Customer. This warranty gives
the Customer specific legal rights and the Customer may also have other legal rights that vary from state to
state.
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