EPHC Controller May 2012
1 - Features
Suitable for 12V or 24V solar panels with a current rating up to 10A. Automatic battery voltage
detection.
High efficiency Pulse Width Modulated charging. Boost, recovery and float charging modes keep your
battery optimally charged.
No moving hardware. Flash memory protects against temperature and vibration problems.
High level of self-protection. Protection against overload, short circuit, reverse connection, lightening,
overcharging, overdischarging and PV reverse current.
LED condition indicators. LED indicators forcharging status, battery status, short-circuit and over-
loading.
Temperature range -35
o
C - 55 oC; temperature compensation charging
Low voltage disconnect feature for loads up to 10A
Weight: 250g Self-consumption: 6mA Dimensions: 140 x 90.5mm
Regulation Point 14.4v Low voltage Disconnect: 11.1V Low voltage reconnect: 13.1V (all 12V)
Float charge: 13.6V Warranty: 1 year CE certified
EPHC 10A 12/24V Solar Charge Regulator
INSTRUCTION GUIDE for
Load switch (LED4)
Load ON/OFF
Load connection
Battery connection
PV connection
PV charge status
(LED1)
Battery status
(LED2)
Short circuit
(LED3)
EPHC Controller May 2012
2- Mounting
The charge regulator should be fitted in a dry, ventilated environment as close as possible to the
battery, to reduce voltage drop. The controller can be mounted using the four corner screw holes.
Controller size is 140 x 90.5mm; distance between screw holes is 133.5 x 70mm.
3 - Wiring
Keep cable lengths as short as possible and use a multi-strand insulated copper wire, 2.5mm
2
Ensure correct polarities throughout.
First connect the regulator to the battery, wiring into the screw
terminals marked with a battery symbol and connecting to the
battery with clamps or ring terminals. It is good practice to fit a
fuse between the battery and regulator.
Next, connect the cable from the solar panel into the screw
terminals marked with a solar panel symbol on the regulator. If
the connection is correct and the panel is in sunshine the
charging LED will be either a solid or flashing green.
Finally, if you are using the optional low voltage disconnect
feature, connect a load to the load terminals on the controller (marked with a lightbulb symbol).
4- LED Indicators and troubleshooting
PV Charge indicator (LED1):
Solid green – the solar panel is charging the battery and everything is working correctly.
Flashing green – system overvoltage or battery open circuit; check connections ratings and polarity.
No light – check connections with solar panel and light levels falling on the panel.
Battery status indicator (LED2)
Solid green – normal power level
Flashing green –fully charged
.Solid yellow – battery level low
Solid red – low voltage, load has been disconnected; wait for voltage to return to normal
Load Short Circuit indicator (LED3)
Solid red – the load is running through the regulator and everything is working correctly
Slow Flashing red – the load current has been 1.25 times higher than 10A for 60 seconds, or 1.5 times
higher for 5 seconds and the load will be shut down. The first time this happens the controller will
automatically restart without any further intervention.
Fast flashing red – there is a second short circuit in the load and the controller has shut down the load.
This time you will need to disconnect the load and push the Load ON/OFF button; charging will start
again after 30 seconds.
Load Switch (LED4)
Solid red – load switch is ON
No light – load switch of OFF
Select Solar Ltd
Waterpark Storage, 4 Ermin Way Barns, The Street,
Latton, Swindon, Wiltshire, SN6 6DN.
www.selectsolar.co.uk
phone: 01793 752 032
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