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ISI-501 Series
Stand-alone Photovoltaic
(PV) Inverter User Manual
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Stand-alone Photovoltaic
(PV) Inverter User Manual
Table of Contents
1.Safety Guidelines ...................... ................................. ............................
2.Introduction
2.1 Fea tures
2.2 Main Specification
3.User Interface Panel
3.1 Fro nt Panel
3.2 LED ind icator on Fro nt Panel
3.3 Rear Panel
4.Output Voltage a nd Frequency Settings
4.1 Initial Factory State
4.2 Procedure to Setting Output Voltage and Frequency
5.Operating
6.Protection
6.1 Input Protec tion
6.2 Output Protection
7.Installation & Wiring
8.Troubleshooting
9.Warranty
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1.Safety Guidelines (Please read through this manual before assembling the Inverter)
‧Ri sk of e lect rical s ho ck and energy ha zar d . All fail ur es shou ld be examined by a
qual ifie d t echnician . P lease do not r em ove th e cas e o f t he i nvert er b y yourse lf!
‧Plea se do n ot ins tall the inverte r i n places with hig h m oisture o r nea r water.
‧Plea se do no t in stall the inverter i n pla ces with high ambie nt te mperatu re, u nde r
direct s unlight, o r near fi re so urc e.
‧Ple a se o nly con nect bat ter i es w ith t he s am e bra nd a nd model nu m ber in o n e
bat ter y b ank. U si ng batteries from d ifferent manuf acturers or different c apacitie s
is st rict l y prohibite d!
‧Ne ver allow a spark o r flame i n th e vic ini ty of the batt er ies.
‧Ma ke sure the air flow from the fan is n ot obstructed at both si de s (front and back )
of t he i nverter. (Please allow at leas t 15cm of spac e)
‧Please d o no t stack a ny o bjects on the in verter as it m ay impede hea t dissipa tion.
‧Pl ease t urn o ff t he inve rter through t he po we r ON /OFF sw itch , bef ore r emovin g
the ba ttery.
WARNING:
Batteries will h ave aging problems after years of operation.
It is sug ges te d to exe cu te reg ul a r b att ery ma int enanc e
(e.g. every year). Once aged, the batteries should be changed
by a p ro fe ssio nal t ec hn ic ia n, or th e f ai le d b at teri es m ay
cause fire or ot her ha zards.
Do n't
disassemble
Inve rter Inve rter
Keep aw ay from
moistu re
Inv erter
Ke ep aw ay f ro m
fire o r hi gh
tem per atur e
Do n't stack o n
the i nverter
Inverter
K eep go od
ve ntilat ion
2. Introdu cti on
‧ISI- 501 is a t r ue si ne wav e D C/AC i nv erter eq uip pe d wi th a solar c harger ( wi th
MPPT) wh ich is digitally contro lled by an ad vanced microprocess or an d is designed
for high frequency operation. This high performance inverter can b e paired with both
battery a nd P V modules / panels.
‧ISI-50 1 can provi de 5 00W pure sine wave o utp ut continuous ly, 550W for 1 minute,
and sust ain a pea k loa d of 10 00W a s long as 3 0 AC power c ycles.
‧ISI-501 adopts a hi gh f req uen cy d es ign which greatly re duces produ ct weight and
improve s ma ximu m e ffi ciency to 8 8%.
‧ISI-501 h as a built-in solar charger with the MPPT fu nctio n which effectively utilizes
energy from th e PV m odu le.
‧IS I- 501 p r og ress e s t he c oncept o f a mini a ture independe nt power st ati on . I t i s
id eal for a reas s uitab le for PV modules and wh ere m ains p owe r is a bsen t.
2.1 Feat ures
‧500W rat ed outpu t
‧Surge po wer capa bilit y up to 1000 W
‧True s ine wave (T HD< 3%)
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‧AC o utpu t vo ltage t ole rance : 3%±
‧High efficiency u p to 88%
‧Built in MPPT sol ar ch arg er, M PPT efficiency: 98% (Typ.)
‧Adjus table o utput vo lt age a nd frequ ency
‧LED indicatio n for ope rati on and battery c apacit y
‧Batte ry low alarm ( wit h ele ctr ically iso la ted dr y con tac t)
‧Rem ote O n/Off functio n
‧Com plianc e t o FCC / C E r egu lations
‧3 ye ar wa rranty
2.2 Ma in Specification
MODEL
Po wer
O
Ra ting
U
Fa ctory
T
Setti ng
P
Ou tpu t Vo ltage
U
T
Protection
Bat . Voltage
I
DC C urr ent
N
Effi ciency
P
Off Mode
U
Current Draw
T
PROT ECTION
P
Op en Ci rcuit
V
Vol ta ge
M
M PPT Vol tag e
o
Ra nge
d
u
Ma ximum
l
Short Ci rcuit
Cu rrent
e
112 12 4 148 212 224 248
500 W co ntinuo us; 55 0W for 1 m in.; 1000W fo r 3 0 A C power cycle s ( 450W;
495 W; 9 00W f or 112 , 212 mod el s)
110Va c, 60Hz ( Default )
100 / 110 / 115 / 1 20Va c ( Adj ustab le)
230 Vac, 50Hz (D efault)
200 / 220 / 230 / 2 40Vac (A djus table)
AC short, over loa d, an d ov er te mperat ur e
10.5 ~ 15.0V
50A
85%
21 .0 ~ 30.0V
30 A
87 %
42.0 ~ 60.0V
15A
87%
10.5 ~ 15 .0V
50A
86%
21.0 ~ 30.0V
30A
88%
Und er 1 .0mA whil e po wer s witch O FF
Ove r cu rre nt, bat ter y r eve rse polarity (int ern al f use ), battery l ow alarm, ba ttery lo w s hut dow n
35~ 50 V
25~ 50 V
45 ~90 V
35 ~90 V
90~160V
70~160V
35~ 50 V
25~ 50 V
35~90V
35~90V
11A 7A 4.5A 11A 7A 4.5A
AC Charger
Cha rg e
Volt ag e
Cha rg e
Curre nt
14.4V
30A
28.8V
17A
57.6V
8.5A
14.4V
30A
28 .8V
17 V
3. Main S pec ification
3.1 Fr ont P ane l
A
AC Outpu t Outlet: To satisfy global demands, there are man y optional AC outlets
to ch oose fro m.
42.0 ~ 60.0V
15A
88%
70~160V
70~160V
57.6V
8.5A
Receptac le
type
Country
Certifica te
TYPE-A
Standard
USA EU ROPE AUSTR ALIA U.K JAPAN GFCI
TYPE-B
Standard
TYPE -C
Optio nal
TYPE-D
Optio nal
TYPE-E
Optio nal
2
TYPE-F
Optio nal
TYPE-U
Optio nal
UNIVERS AL
Non
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B
LED Indi cator (S tatus): Dis play s the opera tion sta tu s of the I SI -501.
C
LED Indi cator (B attery) : Displays remai ning capacity of battery.
Function Setting: Output voltage and frequency c an be set through this button.
D
Pow er O N/O FF S wi tch : Th e i nv e rt er wil l tu rn OFF if the switc h i s i n th e O FF
E
position.
Ventilat ion S li ts: T he in verte r r eq uires good ve ntilati on fo r proper op eration
F
and for p ro lon ging its life time.
AE
O N
O FF
F
A C OUTP UT
Stat us
B
Battery
C
Setti ng
D
Fig ure 3 .1 F ront Pa nel (Type A)
3. 2 LED Indic ator On Fro nt Panel
Operation Status I ndica tor (Status L ED) : Repres ents the cur rent ISI-501 s tate.
LED Di sp lay
Sta tus
Green
Normal Ope ra tio n
Orange
Remote Off
Red
Error
*Note : When an err or occurs, please refer to cha pter 8 "Troubleshooting" of the
use r m anua l.
Battery Ca p aci ty I ndicator (Battery LED) Repr esen ts t he r emai ning ca pa city：
of e xternal batt eries.
LED Di sp lay
Battery Capacity
Green
>70%
Orange
40 ~ 70%
Red
<40%
3. 3 Rear Pa ne
A
Battery Input(+ ),(-) : Pay extra c aution t o battery polar ity when wi ring.
Fa n Vent il a tion Opening: T he inv erter req uires goo d v e nt ilatio n fo r pro per
B
ope ration a nd f or prolon ging its lifetime.
C
Remote ON/OFF Contro l: W hile s et at O N, the ISI-501 can be powered ON/OF F
through remo te c ontrol.
Conne ctor Statu s
Open
In verter S tat us
Remote O N
Short Remote O FF
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D
Battery Low Ala rm: Thi s is an electrically isola ted dry con tact which can provide
the user wit h an exte rnal con trol signal. User w ill be alarmed
of a low battery when the two pins are open while the ISI-501
makes a "Beep" s ound.
Ba ttery St atus
Ba ttery Lo w
Conne ctor Statu s
Conne ctor Open
Alarm
"B eep" Sound
Conne ctor Sho rt -- ---Ba ttery No rmal
E
PV Input Termin al(+),(-): Pay e xt ra caution to PV module polarity when wiring.
F
Groundi ng Term inal(FG ).
DC
B
Batt er yRem ote
low alarmON/O FF
F
SOLA R INPUT
E
BATT ERY INPUT
Rev erse Pol arity
Will Damag eT he Unit .
A
Figure 3 .2 Re ar Panel
4.Ou tput Voltage and Frequency Settings
4.1 Init ial Fact ory S tat e
Ini tiall y the ISI- 501 is s et to output 110Vac a t 60H z or 23 0Vac at 50Hz.
4.2 Pr oc edure to Setting Ou tput Voltage a nd Fr equen cy
The user can a djust the o utpu t vo ltage and frequency through the functio n setting
bu tton o n t he f r ont p an e l. A fter c ha nging th e se tt ings, th e i nvert er wil l reboot
an d set the use r inpu t val u es a s d e f au l t . I n th e fut u re, e ven if t h e b a tt e r y i s
re m ov e d, or is t he r e i s no s o ur c e o f power, the invert er wil l keep these m ost
re cent v al ues that t he u ser input.
Ste p 1: The inv er ter should be t urned off whi le r esetting. In put batt eri es s hould
be connected and the loads shoul d b e removed.
Ste p 2: Use an insul ate d stick t o pre ss do wn on the settin g button and then turn
on the p owe r sw itch; the Panel's orange c olo red LED shou ld flash. After
pressi ng f or 5 s econ ds, th e inverte r wil l s end out a "Beep" so un d. Us er
can releas e the butto n a nd go on w it h the s etting procedure.
Step 3: Check output voltage and frequency with table 4-1. If the output is desired,
pl ease con tinue to step 5; if not, p le ase c ontinue adj ustin g according t o
st ep 4 u ntil it is.
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ON
OFF
AC OUTPUT
Status
Battery
Setting
Use an i nsulated plast ic
st ick to press on t he "Setti ng"
bu tt on
Figure 4.1 Adj ustin g o utput volt age an d freque ncy
Table 4- 1 Voltage & Frequ ency Chart
O/P Volt age
Frequ ency
St atu s
50Hz
Ba tte ry
St atu s
60Hz
Ba tte ry
100 Vac
(200Vac)
● ● ● ●
Red Red Red Re d
Green Gree n Yell ow Yellow
● ★ ● ★
★ ★ ★ ★
Red Red Red Re d
Green Gree n Yell ow Yellow
● ★ ● ★
110Vac 115Vac 120Vac
(2 20Vac) (230Vac) (240 Vac)
● Lig ht ★ Fla shing
Ste p 4: Press the se t tin g bu tton a ro u nd 1 se con d be for e l etting go. The LED
indicators ( Table 4-1) w ill cha nge status. Plea se adjus t accord ing ly.
10 0Vac
(2 00Vac)
50Hz
110Vac
(220Vac)
120 Vac
(240Vac)
50Hz
60Hz
115Vac
(230Vac)
115Vac
(230Vac)
50Hz
60Hz
120Vac
(240Vac)
110Vac
(220Vac)
50Hz
60Hz
100Vac
(200Vac )
Fig ure 4 .2 O utpu t vo ltage & frequ ency cha ngi ng s eque nce
Step 5: W he n the out pu t is a t us er's d es ired val ue, p r ess a nd hol d the se tting
button for 3~5 seconds until the inverter makes a "Beep" sound. The output
setting is now co mplete; the inverter will no w save the se ttings and restart.
60Hz
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5.Operat ion
System On
(SW-O N)
Battery Low Shutdown
Protection
Auto Recov ery
AC Output
Battery
Voltage
ON ON
Charg er
Status
OFF
OFF
OFF
t1 t2 t3 t4 t5 t6 t7
Fig ure 5 .1 O pera tio n Seq uence
t1 : Wh e n u ser tur ns o n t he I SI- 501 , ba tte ry v olt age wil l be sen sed . If bat ter y
volt age i s gre at er th an 13/26/ 52V, i t i s adequ at ely c harged an d t he ch ar ge r
circu it will not acti vate t o p reven t overch arging.
t2 : Wh ile th e I SI- 501 op era tes , b atter y vo ltage wi l l s lo w ly dro p; w h en bat te ry
voltage is l ower than 13/26/52V, batter y low s ignal is sensed and the charger
will aut omatically acti vate and ch arge accordingl y.
t3: If the po wer provided by the PV module is greater than load consumption, the
battery will in crease in voltage. When this battery voltage rea ches 14.4/28.8/
57.6, the charger circuit will shut off its charging current to the battery modules,
to prevent the batteries from overcha rging .
t4: When battery voltage drops to 13 / 26 / 52V again the charger will automatically，
re st art c ha rg in g act io n.
t5 : I f the power provided by the PV module is less than load consump tion, even
if th e c ha rg er is op erational, the battery vol tage will st il l d ro p. When ba tt ery
volta ge is bel ow 10. 5/2 1/4 2V, t he I SI-50 1 w ill s hut down o ut p ut vol ta ge to
prevent the battery from over disch arging t hereby i nc reasing its life time.
t6: Under circu ms tances that the char ge r continuous ly ch arge s the battery, the
bat tery vo ltage will slowly in crease. When b att ery voltage reaches 13/26/52V,
th e sys tem will r e sta rt aft er t hre e mi nut es a nd s tar t p rov idi n g AC vol t age
output.
t7: Same action a s t3.
The status of the in ve rter c hanges dep ending o n the power pr ovide d by the
PV module a nd its load consumption.
t
14.4/28.8/57.6V
13/26/52V
10.5/21/42V
t
t
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6. Protect ion
6.1 Input P rotection
(A)PV Module Reverse Polarity Protection: In the case where the user accidently
re vers es th e p olarit y of th e PV module, the ISI -501 inte rnal fuse wi ll blow to
prote ct o the r c ircui tr y. Pl ea se c on ta ct y ou r neares t dist ri buter or send t he
goods ba ck to Mean Well f or r epair.
(B )Battery Rev erse Polarity P rotection: In the case where the user accidently
re vers es the pola rity of th e batter y connection, the ISI-501 i nter nal fuse will
blow to protect other cir cuitry. Please contact you r nearest d istributer or send
th e goods b ack to Mean Well for repai r.
(C )Batter y Low Shutdown Pr otection: When the ba ttery v oltage i s l ow er than
ra ted s hutdown po int, the ISI-501 w ill s hut down to guarante e the lifetim e of
th e battery.
(D )Bat tery Overvo ltage Pr ot ection: W hen th e batte ry voltage i s too h igh, the
in verter w ill shut do wn and an alarm will sound. Pleas e resolv e the error and
re sta rt th e inve rter to retur n to norm al opera tion.
WARNING:
Before ins tallati on or after use, make sure the power ON/OFF swi tch at
th e f ront panel is in th e OFF position t o safel y w ir e o r r emov e b attery.
Under nor mal working co nditions, please choose suita ble batteries that
ar e w ithin the input D C voltage range of t he i nvert er (r efe r t o s pec).
If the input DC voltage is too low (e.g. using 12Vdc battery bank for 24Vdc
mo dels), the in verter c annot startup properly.
If the input DC voltage is too high (e.g. using 48Vdc battery bank for 24Vdc
mo dels), the in verter will g et d amage d.
6.2 Outp ut Pr otection
If the ISI- 501 dete cts any of the following errors while operat ing , the status LED
in dicators will stay lit until the error is removed.
(A )Over Temperature Pr otection(OTP) : When the i nte rnal tempera ture of th e
ISI-501 re aches a threshold, over temperat ure protec tion will activate causing
shut down. Wait at least 30 minutes before restarting to recover normal operation.
(B ) AC Output Short C ircu it Protec ti on: W hen the AC output of th e ISI-501 is
short circuited, it will go into protection. Restart to recov er norma l operation.
(C) Over L oad Protection: When the load is in the over load range of 500~550W
(4 50~495W for 112/21 2 mode ls), the i nv erter can conti nu e s upplying power
fo r a short dura tio n of 1 minute. If th e l oad is not removed , the sensing circuit
will activate causing shut do wn.
7. Install at ion & Wiring
(A) Wiring for batterie s: Wire connection should be made as short as pos sible les s
than 1. 5 m is h ig hly re co mme nded. Als o m ake sure s uita b le wires ar e chos en
based on safety requirement and curren t rating . Cross sections that are to o small
wil l result in lower effic ien cy, less output power, and the wire s may also become
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ove rhea ted and cau s e d ang e r. P l eas e re fer to t abl e 7. 1 or c o nsu lt u s or ou r
di stributors if yo u h ave any q uestions.
Table 7-1 Suggest io n for w ire select ion
Cro ss sec ti on of wire
le ad(mm )
2
1.5
2.5
4
6
AWG
14
12
10
8
Suggested Model
PV mo dule inp ut w ire
48V b attery m ode ls
24V b attery m ode ls
12V b attery m ode ls
(B)Sugg ested Ba ttery Type a nd Cap acity
Battery Type
Le ad-ac id
12V models 24V mo dels 48V mode ls
Battery
Capacit y
12V / 120Ah ~ 24 V / 60Ah ~ 4 8V / 3 0Ah ~
12V / 400Ah 24 V / 200A h 48V / 1 00A h
Note : If the desired b attery t yp e is no t Lead-Ac id based, ple ase contact the batte ry
manufac turer fo r an a dvised v alue.
(C)Install at ion Re quireme nts:
‧The unit should be mounted on a flat surface or holding rack with suitable strength.
In order t o ensure the lifespan of th e unit, please re frain f rom operating t he unit
in du sty or mo ist e nviron ment s. T his is a power un it w it h bui lt- in DC fan.
Please m ak e su re t he ven ti lat io n opening s are not b locke d a n d r ef ra in fro m
continuou s o pe ra ti on wit h heavy l oad in high amb ient environ me nt b ecaus e
this may prevent inverter from operating properly and its life span may be affected.
We hi ghly r ec ommen d tha t th ere s hould be no objects impe ding a irfl ow wit hi n
15cm of the ventilati on openings.
>15 cm
Air
In verter
>15 cm
Air
Figure 7 .1 : Exam ple of In st all ation
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(D)Sugg ested Moun ting
The c ase has four rese rv ed h oles for fixing, the user can uti lize th es e t o m ou nt
th e ISI-50 1 as sh own below. I t is advi se d t o mount t he ISI-5 01 ho rizontal.
(E )Exam ple of System Se tup
Leads should be as sho rt as possible
Lar ge r
AC O/ P
tha n
15c m
AC L oad
IS I-501
Solar p anel
Battery
-
+
Lar ger
tha n
15c m
Inv erter
DC I/P
-
+
Solar
I/P
+
FG
-
Lead s should be les s than 1.5m
Based on the ac tual len gth o f wirin g, cho ose
suitabl e cros s-section of the l ead s
(F )Der ating
100
80
60
50
40
20
-20 100 20 30 40 50 60
Ambient Temper ature ( ) Ta℃
Figure 7 .2 Ou tpu t Derating Cu rve
Wall or sys tem FG
100
80
60
40
20
10.5V DC
21VDC
42VDC
11.5VDC
23VDC
46VDC
Battery Inp ut Vo ltage ( V)
Fi gure 7 .3 Input Derati ng Curve
9
15VDC
30VDC
60VDC
(HORIZONTAL)
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(G) Notes on O utpu t Load s:
ISI-501 Series can power most equ ipment requiring an AC source of 500W,
but fo r cer tai n t ype of load , the unit m ay not work properly.
(1 )Since in duc tive l oa d s o r motor b ase d e quipme nt s n e ed s a large s ta rt up
current (6~10 times of its rated current), please make sure this startup curren t
is less t han the max imum c urrent cap abil ity of the inverter.
(2 )When t he l oads are capa citi ve o r rect ifie d e qu ip ment s ( such as switchi ng
power supply), we suggest operating these e quipment a t no loa d or light load
dur ing power O N. Increase the load slowly only after t he ISI-50 1 has started
up to e nsur e proper operati on.
8. Tro ubles hooti ng
IS I-50 1 is a compl ex pr oduct w hich shou ld b e s erviced by p ro fess ion al t echnician .
Improp er u sage or modification may damage the u nit or result in shock hazard. If you
are not able to c lear the failure co ndition according to the following in struction s, please
co ntac t us or yo ur closest distrib utor for repa ir se rvice.
Failure S tatu e Possi ble Reas on s
Abnor mal Inpu t
Recommended Sol ut ion s
Check the DC input sources (PV/ battery)
to make su re the volt ag e i s w ithi n t he
required range
Make sure tha t the vent i lat i o n i s n o t
Over Temperat ur e
Protection
No AC Ou tpu t
Volta ge
Overloa d Prot ec tion
bl ocke d and the ambi en t tem pe ratu re
is not too high. Please derate load usage
or lower the a mbien t t emperature
Make s u r e t he o u t p u t l o a d does n o t
ex c e e d the r a t e d v a l u e o r t h e peak
startup current is no t too high, typically
found in inducti ve or capacitive lo ads
Make sure the output is not ov erloaded
or sh ort circuit ed
Reconfi rm batte ry specificatio n and
enlarge the battery capacity as suggested
Battery
Dischar ging
Period t o sho rt
Short Circuit Protection
Battery Aged or Broken Repl ace th e batteries
Battery Capacity is
too Small
9. Warranty
Three years of warranty is provided under normal operating conditions. Please
do no t cha nge co mponents or modify the un it by your self or a ttempt to repair
th e unit by yourself becau se Mea n We ll r eserves t he r ight to void the warranty.
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