Cenga Power BACKUP INVERTER User manual

BACKUP'INVERTER'/'BACKUP'INVERTER-120'
6kW$Backup$Inverter$(Split$Phase$120V/240V$and$Single$Phase$
120V)$$
User’s$Manual$
Version$1.0$
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Utility$+$Inverter$+$Charger$+$Transfer$Switch$+$Solar$Power$+$AGS$$

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Important$Safety$Information$........................................................................................................$3$
General$Safety$Precautions$........................................................................................................$3$
Precautions$When$Working$with$Batteries$................................................................................$3$
Introduction$...................................................................................................................................$4$
General$Information$...................................................................................................................$4$
Key$Features$...................................................................................................................................$5$
Electrical$Performance$...................................................................................................................$5$
Inverter$.......................................................................................................................................$5$
Topology$.................................................................................................................................$5$
AC$Charger$..................................................................................................................................$6$
De-sulfation$............................................................................................................................$8$
Transfer$......................................................................................................................................$8$
Auto$frequency$adjust$................................................................................................................$9$
Solar$Charger$..............................................................................................................................$9$
Maximum$Power$Point$Tracking$(MPPT)$Function$.................................................................$9$
Power$Saver$Mode$.....................................................................................................................$9$
Protections$...............................................................................................................................$10$
LED$Indicator$&$LCD$.................................................................................................................$10$
Audible$Alarm$...........................................................................................................................$11$
FAN$Operation$..........................................................................................................................$12$
DIP$Switches$.............................................................................................................................$12$
Other$features$..........................................................................................................................$13$
Conformal$Coating$...................................................................................................................$14$
Installation$....................................................................................................................................$14$
Location$....................................................................................................................................$14$
DC$Wiring$recommendation$.....................................................................................................$14$
AC$Wiring$..................................................................................................................................$14$
Troubleshooting$Guide$.................................................................................................................$15$
Warranty$......................................................................................................................................$17$
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Important!Safety!Information!
WARNING!'-'This'manual'contains'important'instructions'for'all'Inverter/Charger'models'that'
shall'be'followed'during'installation'and'maintenance'of'the'inverter.'
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General!Safety!Precautions!
1. Before$installing$and$using$the$BACKUP$INVERTER,$read$all$instructions$and$cautionary$
markings$on$the$BACKUP$INVERTER$and$all$appropriate$sections$of$this$guide.$Be$sure$to$
read$all$instructions$and$cautionary$markings$for$any$equipment$attached$to$this$unit.$
2. This$unit$is$designed$for$indoor$use$only.$Do$not$expose$the$BACKUP$INVERTER$to$rain,$
snow,$or$spray.$
3. To$reduce$risk$of$fire$hazard,$do$not$cover$or$obstruct$the$ventilation$openings.$Do$not$
install$the$BACKUP$INVERTER$in$a$zero-clearance$compartment.$Overheating$may$result.$
4. Use$only$attachments$recommended$or$sold$by$the$manufacturer.$Doing$otherwise$may$
result$in$a$risk$of$fire,$electric$shock,$or$injury$to$persons.$
5. To$avoid$a$risk$of$fire$and$electric$shock,$make$sure$that$existing$wiring$is$in$good$
condition$and$that$wire$is$not$undersized.$Do$not$operate$the$BACKUP$INVERTER$with$
damaged$or$substandard$wiring.$
6. Do$not$operate$the$BACKUP$INVERTER$if$it$has$received$a$sharp$blow,$been$dropped,$or$
otherwise$damaged$in$any$way.$If$the$BACKUP$INVERTER$is$damaged,$see$the$Warranty$
section.$
7. Do$not$disassemble$the$BACKUP$INVERTER.$It$contains$no$user-serviceable$parts.$$See$
Warranty$for$instructions$on$obtaining$service.$Attempting$to$service$the$BACKUP$
INVERTER$yourself$may$result$in$a$risk$of$electrical$shock$or$fire.$Internal$capacitors$
remain$charged$after$all$power$is$disconnected.$
8. The$BACKUP$INVERTER$contains$more$than$one$live$circuit$(batteries$and$AC$line).$Power$
may$be$present$at$more$than$one$source.$To$reduce$the$risk$of$electrical$shock,$
disconnect$both$AC$and$DC$power$from$the$BACKUP$INVERTER$before$attempting$any$
maintenance$or$cleaning$or$working$on$any$circuits$connected$to$the$BACKUP$INVERTER.$
Turning$off$controls$will$not$reduce$this$risk.$
9. Use$insulated$tools$to$reduce$the$chance$of$short-circuits$when$installing$or$working$
with$the$inverter,$the$batteries,$or$PV$array.$
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Precautions!When!Working!with!Batteries!
1. Make$sure$the$area$around$the$battery$is$well$ventilated.$
2. Never$smoke$or$allow$a$spark$or$flame$near$the$engine$or$batteries.$
3. Use$caution$to$reduce$the$risk$of$dropping$a$metal$tool$on$the$battery.$It$could$spark$or$
short$circuit$the$battery$or$other$electrical$parts$and$could$cause$an$explosion.$
4. Remove$all$metal$items,$like$rings,$bracelets,$and$watches$when$working$with$lead-acid$
batteries.$
5. Lead-acid$batteries$produce$a$short$circuit$current$high$enough$to$weld$metal$to$skin,$
causing$a$severe$burn.$
6. Have$someone$within$range$of$your$voice$or$close$enough$to$come$to$your$aid$when$you$

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work$near$a$lead-acid$battery.$
7. Have$plenty$of$fresh$water$and$soap$nearby$in$case$battery$acid$contacts$skin,$clothing,$
or$eyes.$
8. Wear$complete$eye$protection$and$clothing$protection.$Avoid$touching$your$eyes$while$
working$near$batteries.$
9. If$battery$acid$contacts$skin$or$clothing,$wash$immediately$with$soap$and$water.$If$acid$
enters$your$eye,$immediately$flood$it$with$running$cold$water$for$at$least$twenty$
minutes$and$get$medical$attention$immediately.$
10. If$you$need$to$remove$a$battery,$always$remove$the$grounded$terminal$from$the$battery$
first.$Make$sure$all$accessories$are$off$so$you$don’t$cause$a$spark.$
11. Always$use$identical$types$of$batteries.$
12. Never$install$old$or$untested$batteries.$Check$each$battery’s$date$code$or$label$to$ensure$
age$and$type.$
13. Batteries$are$temperature$sensitive.$For$optimum$performance,$the$should$be$installed$
in$a$stable$temperature$environment.$
14. Always$recycle$old$batteries.$Contact$your$local$recycling$center$for$proper$disposal$
information.$
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Introduction$
General!Information!
Thank$you$for$purchasing$the$BACKUP$INVERTER.$$The$BACKUP$INVERTER$Pure$Sine$Wave$
Inverter$is$a$combination$of$an$inverter,$charger,$solar$power$and$Auto-transfer$switch$into$one$
complete$system.$$It$is$packed$with$unique$features$and$it$is$one$of$the$most$advanced$
inverter/chargers$in$the$market$today.$$$
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The$inverter$features$an$AC$pass-through$circuit,$powering$your$home$appliances$from$utility$or$
generator$power$while$charging$the$battery.$When$utility$power$fails,$the$battery$backup$
system$keeps$your$appliances$powered$until$utility$power$is$restored.$$Internal$protection$
circuits$prevent$over-discharge$of$the$batteries$by$shutting$down$the$inverter$when$a$low$
battery$condition$occurs.$$When$utility$or$generator$power$is$restored,$the$inverter$transfers$to$
the$AC$source$and$recharges$the$batteries.$$$
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Accessories$allow$the$BACKUP$INVERTER$series$to$also$serve$as$a$central$hub$of$a$renewable$
energy$system.$$Setting$the$BACKUP$INVERTER$inverter$to$battery$priority$mode$designates$that$
the$load$power$is$normally$provided$by$the$inverter.$$However,$if$the$inverter$output$is$
interrupted,$an$internal$transfer$switch$automatically$transfers$the$load$from$the$inverter$to$
commercial$AC$power.$$The$transfer$time$between$inverter$and$line$is$short$(6ms$typical;$10ms$
max),$and$such$transfers$are$normally$not$detected$by$even$highly$sensitive$loads.$Upon$
restoration$of$inverter$power,$the$inverter$will$transfer$back$to$inverter$power.$$If$the$BACKUP$
INVERTER$is$set$to$line$priority$mode,$when$utility$AC$power$cuts$off$(or$falls$out$of$acceptable$
range),$the$transfer$relay$is$de-energized$and$the$load$is$automatically$transferred$to$the$

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Inverter$output.$$Once$the$qualified$AC$utility$is$restored,$the$relay$is$energized$and$the$load$is$
automatically$reconnected$to$AC$utility.$$$
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The$Inverter$also$features$power$factor$corrected,$sophisticated$multi-stage$charging$and$pure$
sine$wave$output$with$unprecedentedly$high$surge$capability$to$meet$demanding$power$needs$
of$inductive$loads$without$endangering$the$equipment.$$The$BACKUP$INVERTER$is$equipped$
with$a$powerful$40A$charger.$$The$overload$capacity$is$300%$of$continuous$output$for$up$to$20$
seconds$to$reliably$support$tools$and$equipment$longer$–$especially$loads$requiring$extra$power$
to$start-up$such$as$wells$and$other$motors.$$$
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Another$important$feature$is$that$the$inverter$can$be$easily$customized$to$Battery$priority$via$a$
DIP$switch,$this$helps$to$extract$maximum$power$from$the$batteries$in$renewable$energy$
systems.$$Thus,$the$BACKUP$INVERTER$is$suitable$for$Renewable$energy$system,$Utility,$RV,$
Marine$and$Emergency$backup$applications.$$To$get$the$most$out$of$the$power$inverter,$it$must$
be$installed,$used$and$maintained$properly.$$Please$read$the$instructions$in$this$manual$before$
installing$and$operating.$
Key!Features!
• Battery$Temperature$Sensor$(BTS)$(optional)$
• Automatic$Generator$Starting$(AGS)$(optional)$
• Supports$Advanced$Solar$Charging$with$an$Integrated$MPPT$Charger$
• Designed$to$Operate$in$Harsh$Environments$
• DC$Start$&$Automatic$Self-Diagnostic$Functions$
• Compatible$with$Both$Linear$&$Non-Linear$Loads$
• Easy$to$Install$&$Easy$to$Operate$&$Easy$to$Troubleshoot$
• Powerful$Charge$Rate$Up$to$40$Amps,$Selectable$From$0%-100%$
• High$Efficiency$Design$&$“Power$Saving$Mode”$to$Conserve$Energy$
• Innovative$Battery$Priority$Mode$Designates$the$Preferred$Operating$Configuration$
• Low$Voltage$Battery$Recover$Point,$Perfect$for$Renewable$Energy$Systems$
• 8$Pre-Set$Battery$Type$Selectors$plus$De-sulfation$for$Totally$Depleted$Batteries$
• 4-step$Intelligent$Battery$Charging$with$Power$Factor$Correction$for$Charger$
• 6ms$(10ms$max)$Transfer$Time$Between$Utility$&$Battery$Guarantees$Power$Continuity$
• 15s$Delay$Before$Transfer$when$AC$Resumes$Provides$Protection$for$Loads$when$Used$
with$Generators$
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Electrical!Performance!
Inverter!
Topology!
The$Backup$Inverter$is$built$according$to$the$following$topology.$
• Inverter:$Full$Bridge$Topology.$

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• AC$Charger:$Isolate$Boost$Topology$
• Solar$Charger:$MPPT$PV$Controller$
Because$of$the$heavy-duty,$high$quality$design,$the$BACKUP$INVERTER$is$able$to$produce$a$pure$
sine$wave$suitable$for$all$types$of$electrical$loads$–$from$motors$to$sensitive$electronics$
equipment.$The$peak$efficiency$of$the$BACKUP$INVERTER$is$88%.$
Overload$Capacity$
The$BACKUP$INVERTER$has$different$overload$capacities,$making$it$ideal$to$handle$demanding$
loads.$
• For$110%<Load<125%(±10%),$no$audible$alarm$in$14$minutes,$beeps$0.5s$every$1s$in$the$
15th$minute,$and$Fault(Turn$off)$after$the$15th$minute.$
• For$125%<Load<150%(±10%),$beeps$0.5s$every$1s$and$Fault$(Turn$off)$after$the$1$
minute.$
• For$300%
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Load>150%(±10%),$beeps$0.5s$every$1s$and$Fault$(Turn$off)$after$20s.$
AC!Charger!
The$BACKUP$INVERTER$is$equipped$with$an$active$PFC$(Power$Factor$Corrected)$multistage$
battery$charger.$The$PFC$feature$is$used$to$control$the$amount$of$power$used$to$charge$the$
batteries$in$order$to$obtain$a$power$factor$as$close$as$possible$to$1.$
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Unlike$other$inverters$whose$max$charging$current$decreases$according$to$the$input$AC$voltage,$
the$BACKUP$INVERTER$charger$is$able$to$output$max$current$as$long$as$input$AC$voltage$is$in$
the$range$of$164-243VAC$(95-127VAC$for$120V$model),$and$AC$frequency$is$in$the$range$of$48$-$
54Hz$(58-64Hz$for$60Hz$model).$
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The$BACKUP$INVERTER$is$equipped$with$a$strong$charging$current$of$40A,$and$the$max$charge$
current$can$be$adjusted$from$0%-100%$via$a$liner$switch$at$the$right$of$the$battery$type$
selector.$This$will$be$helpful$if$you$are$using$our$powerful$charger$on$a$small$capacity$battery$
bank.$The$linear$switch$can$effectively$reduce$the$max$charging$current$to$20%$of$its$peak.$
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Choosing$“0”$in$the$battery$type$selector$will$disable$the$charging$function.$
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There$are$3$main$charging$stages:$
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Bulk'Charging:$$This$is$the$initial$stage$of$charging.$$While$Bulk$Charging,$the$charger$supplies$
the$battery$with$controlled$constant$current.$$The$charger$will$remain$in$Bulk$charge$until$the$
Absorption$charge$voltage$(determined$by$the$Battery$Type$selection)$is$achieved.$$A$software$
timer$will$measure$the$time$from$AC$start$until$the$battery$charger$reaches$0.3V$below$the$
boost$voltage.$
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Absorb'Charging:$$This$is$the$second$charging$stage$and$begins$after$the$absorb$voltage$has$
been$reached.$$Absorb$Charging$provides$the$batteries$with$a$constant$voltage$and$reduces$the$
DC$charging$current$in$order$to$maintain$the$absorb$voltage$setting.$$In$this$period,$the$inverter$
will$start$a$T1$timer;$the$charger$will$keep$the$boost$voltage$in$Boost$CV$mode$until$the$T1$timer$

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has$run$out.$Then$drop$the$voltage$down$to$the$float$voltage.$The$timer$has$a$minimum$time$of$
1$hour$and$a$maximum$time$of$12$hours.$
Float'Charging:$The$third$charging$stage$occurs$at$the$end$of$the$Absorb$Charging$time.$$While$
Float$charging,$the$charge$voltage$is$reduced$to$the$float$charge$voltage$(determined$by$the$
Battery$Type$selection).$$In$this$stage,$the$batteries$are$kept$fully$charged$and$ready$if$needed$
by$the$inverter.$
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If$the$AC$power$is$reconnected$or$the$battery$voltage$drops$below$48Vdc,$the$charger$will$reset$
the$cycle$above.$If$the$charge$maintains$the$float$state$for$10$days,$the$charger$will$deliberately$
reset$the$cycle$to$protect$the$battery.$
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Figure'1:'Battery'Charging'Process
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Figure'2:'Battery'Type'Selector'
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De-sulfation!
The$de-sulfation$cycle$on$switch$position$8$is$marked$in$red$because$this$is$a$very$dangerous$
setting$if$you$do$not$know$what$you$are$doing.$Before$ever$attempting$to$use$this$cycle$you$
must$clearly$understand$what$it$does$and$when$and$how$you$would$use$it.$$Sulfation$can$occur$
with$infrequent$use$of$the$batteries,$or$if$the$batteries$have$been$left$discharged$so$low$that$
they$will$not$accept$a$charge.$This$cycle$is$a$very$high$voltage$charge$cycle$designed$to$try$to$
break$down$the$sulfated$crust$that$is$preventing$the$plates$taking$a$charge$and$thus$allow$the$
plates$to$clean$up$and$so$accept$charge$once$again.$
Charging'depleted'batteries:$$The$BACKUP$INVERTER$inverter$allows$start-up$and$through$
power$with$fully$depleted$batteries.$$After$the$battery$bank$voltage$goes$below$40V,$if$the$
switch$is$still$(and$has$always)$kept$in$"ON"$position,$the$inverter$is$continuously$connected$
with$battery,$and$the$battery$bank$voltage$does$not$drop$below$32V,$the$inverter$will$be$able$to$
charge$the$battery$once$qualified$AC$inputs$are$present.$
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Before$the$battery$voltage$goes$below$36VDC,$the$charging$can$be$activated$when$the$switch$is$
turned$to$“Off”,$then$to$“ON”.$$When$the$voltage$goes$below$36VDC,$and$you$accidently$turn$
the$switch$to$OFF$or$disconnect$the$inverter$from$battery,$the$inverter$will$not$be$able$to$
charge$the$battery$once$again,$because$the$CPU$loses$memory$during$this$process.$$$
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AC'Charging'Current:$$The$Inverter$has$an$AC$charging$current$of$40A$(+/-$5A).$$The$charging$
capacity$will$go$to$peak$in$around$3$seconds.$This$may$cause$a$generator$to$drop$frequency,$
making$the$inverter$transfer$to$battery$mode.$$It$is$suggested$to$gradually$put$charging$load$on$
the$generator$by$switching$the$charging$switch$from$min$to$max,$together$with$the$15s$switch$
delay,$the$inverter$gives$the$generator$enough$time$to$spin$up.$This$will$depend$on$the$size$of$
the$generator$and$rate$of$charge.
Transfer!
While$in$Standby$Mode,$the$AC$input$is$continually$monitored$by$the$Inverter.$$Whenever$AC$
power$falls$below$the$VAC$Trip$voltage$(90VAC$for$each$120VAC$phase),$the$inverter$
automatically$transfers$back$to$the$Invert$Mode$with$minimum$interruption$to$your$appliances$-$
as$long$as$the$inverter$is$turned$on.$The$transfer$from$Standby$mode$to$Inverter$mode$occurs$in$
approximately$6$ms$(10ms$max).$$The$transfer$time$is$the$same$from$Inverter$mode$to$Standby$
mode.$
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Though$it$is$not$designed$as$a$computer$UPS$system,$this$transfer$time$is$usually$fast$enough$to$
keep$sensitive$electronics$equipment$powered$up.$
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There$is$a$15-second$delay$from$the$time$the$inverter$senses$that$continuously$qualified$AC$is$
present$at$the$input$terminals$to$when$the$transfer$is$made.$This$delay$is$built$in$to$provide$
time$for$a$generator$to$spin-up$to$a$stable$voltage$and$avoid$relay$chattering.$The$inverter$will$
not$transfer$to$generator$until$it$has$locked$onto$the$generator’s$output.$This$delay$is$also$
designed$to$avoid$frequent$switching$when$input$power$is$unstable.$

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Auto!frequency!adjust!
The$inverter$is$equipped$with$an$Auto$Frequency$adjust$function.$$The$factory$default$
configuration$for$220/230/240VAC$inverter$is$50Hz,$and$60Hz$for$100/110/120VAC$inverter.$$
While$the$output$frequency$can$be$easily$changed$once$a$qualified$frequency$is$applied$to$the$
inverter.$$If$you$want$to$get$60Hz$from$a$50Hz$inverter,$just$input$60Hz$power,$and$the$inverter$
will$automatically$adjust$the$output$frequency$to$60Hz$and$vice$versa.$
Solar!Charger!
NOTE:$The$optional$battery$temperature$sensor$automatically$adjusts$the$charging$process$of$
the$controller$according$to$the$type$of$battery$that$is$selected$by$user$through$battery$type$
selector.$With$the$battery$temperature$sensor$installed,$the$controller$will$increase$or$decrease$
the$battery$charging$voltage$depending$on$the$temperature$of$the$battery$to$optimize$the$
charge$to$the$battery$and$maintain$optional$performance$of$the$battery.$
Maximum!Power!Point!Tracking!(MPPT)!Function!
Maximum$Power$Point$Tracking,$frequently$referred$to$as$MPPT,$is$an$electronic$system$that$
operates$the$Photovoltaic$(PV)$modules$in$a$manner$that$allows$the$modules$to$produce$all$the$
power$they$are$capable$of.$
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The$advanced$Charge$controller$is$a$microprocessor-based$system$designed$to$implement$the$
MPPT$and$can$increase$charge$current$up$to$30%$or$more$compared$to$traditional$charge$
controllers.$$The$qualified$DC$input$volt$range$is$55v-110VDC.$$If$the$voltage$falls$out$of$this$
range,$the$charger$will$not$work$properly.$Special$attention$should$be$paid$to$this$when$
configuring$the$solar$array.$
Power!Saver!Mode!
There$are$3$different$working$status$for$PE$inverter:$“Power$Saver$Auto”,$“Power$Saver$Off”,$
and$“Power$Off”.$$When$power$switch$is$in$“Unit$Off”$position,$the$inverter$is$powered$off.$$
When$power$switch$is$turned$to$either$of$“Power$Saver$Auto”$or$“Power$Saver$Off”,$the$
inverter$is$powered$on.$$$
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Power$saver$mode$is$designed$to$conserve$battery$power$when$AC$power$is$not$or$rarely$
required$by$the$loads.$$In$this$mode,$the$inverter$pulses$the$AC$output$looking$for$an$AC$load$
(i.e.,$electrical$appliance).$Whenever$an$AC$load$(greater$than$25$watts)$is$turned$on,$the$
inverter$recognizes$the$need$for$power$and$automatically$starts$inverting$and$output$goes$to$
full$voltage.$$When$there$is$no$load$(or$less$than$25$watts)$detected,$the$inverter$automatically$
goes$back$into$search$mode$to$minimize$energy$consumption$from$the$battery$bank.$$In$“Power$
saver$on”$mode,$the$inverter$will$draw$power$mainly$in$sensing$moments,$thus$the$idle$
consumption$is$significantly$reduced.$
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The$inverter$is$factory$defaulted$to$detect$load$for$250ms$every$30$seconds.$This$cycle$can$be$
customized$to$3$seconds$by$turning$SW3$on$the$DIP$switch.$

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When$in$the$search$sense$mode,$the$green$power$LED$will$blink$and$the$inverter$will$make$a$
ticking$sound.$$At$full$output$voltage,$the$green$power$LED$will$light$steadily$and$the$inverter$
will$make$a$steady$humming$sound.$When$the$inverter$is$used$as$an$“uninterruptible”$power$
supply$the$search$sense$mode$or$“Power$Saver$On”$function$should$be$defeated.$
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Exceptions:$$Some$devices$when$scanned$by$the$load$sensor$cannot$be$detected.$Small$
fluorescent$lights$are$the$most$common$example.$(Try$altering$the$plug$polarity$by$turning$the$
plug$over.)$Some$computers$and$sophisticated$electronics$have$power$supplies$that$do$not$
present$a$load$until$line$voltage$is$available.$When$this$occurs,$each$unit$waits$for$the$other$to$
begin.$To$drive$these$loads$either$a$small$companion$load$must$be$used$to$bring$the$inverter$
out$of$its$search$mode,$or$the$inverter$may$be$programmed$to$remain$at$full$output$voltage.$
Protections!
The$BACKUP$INVERTER$inverter$is$equipped$with$extensive$protections$against$various$harsh$
situations/faults.$$These$protections$include:$
• AC$Input$over$voltage$protection/AC$Input$low$voltage$protection$
• Low$battery$alarm/High$battery$alarm$
• Over$temperature$protection/Over$load$protection$
• Short$Circuit$protection$(1s$after$fault)$
• Back$feeding$protection$
$
When$Over$temperature$/Over$load$occur,$after$the$fault$is$cleared,$the$master$switch$has$to$be$
reset$to$restart$the$inverter.$
$
The$Low$battery$voltage$trip$point$can$be$customized$from$defaulted$value$10VDC$to$10.5VDC$
thru$the$SW1$on$the$DIP$switch.$
$
The$inverter$will$go$to$Over$temp$protection$when$the$heat$sink$temp.$≥105ºC,$and$it$will$go$to$
Fault$(shutdown$the$output)$after$30$seconds.$The$switch$has$to$be$reset$to$reactivate$the$
inverter.$
$
The$Inverter$has$back-feeding$protection$which$avoids$presenting$an$AC$voltage$on$the$AC$
input$terminal$in$Invert$mode.$
$
Note:''After'the'reason'for'fault'is'cleared,'the'inverter'has'to'be'reset'to'start'working.'
LED!Indicator!&!LCD!
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$
$
Line$Mode$
Green$LED$lit$in$AC$Mode$
Inverter$Mode$
Green$LED$lit$in$Inverter$Mode$
Fast$Charge$
Yellow$LED$lit$in$Fast$Charging$Mode$
Float$Charge$
Green$LED$lit$in$Float$Charging$Mode$
Alarm$Mode$
Red$LED$lit$in$error$state$
Over$Temp$Trip$
Red$LED$in$Over$Temperature$
Over$Load$Trip$
Red$LED$in$Over$Load$
Power$Saver$On$
Green$LED$lit$in$Power$Saver$Mode$
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$
Audible!Alarm!
Battery$Voltage$Low$
Inverter$Green$LED$is$lit$and$the$buzzer$beeps$every$5s$for$.5s$
duration.$
Battery$Voltage$High$
Inverter$Green$LED$is$lit$and$the$buzzer$beeps$ever$1s$for$.5s$
(Fault$after$60s).$
Inverter$Over-Load$
1. Between$110%$and$125%,$no$alarm$for$first$14min,$
beeps$every$1s$for$.5s$@$15th$min$and$fault$after$15min.$

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2. Between$125%$and$150%,$beeps$every$1s$for$.5s$and$
fault$after$60s.$
3. Greater$than$150%,$beeps$every$1s$for$.5s$and$fault$after$
20s.$
Over$Temperature$
When$the$heatsink$temperature$is$greater$than$105ºC,$beeps$
every$1s$for$.5s$(over$temp$LED$is$lit).$
$
FAN!Operation!
There$are$two$DC$fans$and$one$AC$fan$inside$the$inverter.$While$in$inverter$mode,$the$AC$fan$
will$run$to$dissipate$heat.$$When$the$inverter$is$in$power$saver$mode,$the$AC$fan$will$work$from$
time$to$time$in$response$to$the$pulse$sent$by$the$inverter$in$power$saver$mode.$
$
The$Operation$of$the$DC$fan$at$the$DC$terminal$side$is$controlled$by$the$following$logic:$
Item$
$$$$Condition $
Speed$
$
H $ EAT$ S I N $ K$
TE MP ER A T U RE $
T$ >$ 65℃ $
O FF $
T$ ≤$ 60℃$/$T$ ≥$ 85℃$
50% $
T$ ≤$ 80℃ $
100%$
$
C $ H $ ARGER$
CU R $ RE N $T$
I$$ ≥$ 20% $
O FF $
I$$ ≤$ 15%$/$ I$$ ≥$ 50%$
50% $
I$$ ≤$ 40% $
100%$
$
L O $ A D % $
$
(I N $V$ M $O$ D $ E ) $
Load$$ ≥$ 30%$
O FF $
Load$$ ≤$ 20%$/$ Load$$ ≥$ 50%$
50% $
Load$$ ≤$ 40%$
100%$
$
Allow$at$least$30CM$of$clearance$around$the$inverter$for$air$flow.$Make$sure$that$the$air$can$
circulate$freely$around$the$unit.$$Variable$speed$fan$operation$is$required$in$invert$and$charge$
mode.$This$is$to$ensure$high$reliability$and$safe$unit$and$component$operating$temperatures$in$
an$operating$ambient$temperature$up$to$50°C.$
$
DIP!Switches!
On$the$rear$panel$of$inverter,$there$are$5$DIP$switches$which$enable$users$to$customize$the$
performance$of$the$device.$
$
D IP Switch N O.
Switch F un c t i on
P o s i t i on : 0
P o s i t i on : 1
SW 1
Low B a tt e r y Trip V o l t
10 . 0 V dc
10 . 5 V dc
*4 for 48 V dc
SW 2
AC I npu t R ange / (AVR)
230Vac HV
184 - 253 V a c / ( 176 - 276 V a c )
154 - 253 V a c / ( 150 - 276 V a c )
120Vac LV
100 - 135 V a c / ( 92 - 144 V a c )
90 - 135 V a c / ( 78 - 144 V a c )
SW 3
Power Saver A u t o S e tt i ng
Detect Load Per 5 S e c s
Night C ha r ge F un c t i on
SW 4
O/P Frequency S e tt i ng
50 H z
60 H z

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SW 5
S o l a r / AC Priority S e tt i ng
U t ili t y P r i o r i t y
Solar P r i o r i t y
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SW1'–'Low'Battery'Trip'Volt:''
The$Low$Battery$Trip$Volt$is$set$at$40.0Vdc$which$is$typical$for$a$deep$cycle$lead$acid$battery.$$It$
can$be$customized$to$42Vdc$using$SW1$for$sealed$AGM$batteries,$to$prevent$the$batteries$from$
over-discharging$while$there$is$only$a$small$load$applied$on$the$inverter.$
$
SW2'–'AC'Input'Range:'
There$are$different$acceptable$AC$input$ranges$for$different$kinds$of$loads.$$For$some$relatively$
sensitive$electronic$devices,$a$narrow$input$range$of$184-253VAC$(100-135V$for$per$phase)$is$
required$to$protect$them.$$While$for$some$resistive$loads$which$work$in$a$wide$voltage$range,$
the$input$AC$range$can$be$customized$to$154-253VAC$(90-135V$per$phase),$this$helps$to$power$
loads$with$the$most$AC$input$power$without$frequent$switches$to$the$battery$bank.$
$
SW3'–'Power'Saver'Auto'Setting:'
The$inverter$is$factory$defaulted$to$detect$load$for$250ms$in$every$5$seconds.$This$cycle$can$be$
changed$to$3$seconds$thru$the$SW3$on$the$DIP$switch.$
$
SW4'–'Solar/AC'Priority:'
The$BACKUP$INVERTER$is$designed$with$AC$priority$by$default.$This$means$that$when$AC$input$is$
present,$the$battery$will$be$charged$first,$and$the$inverter$will$transfer$the$input$AC$to$power$
the$load.$Only$when$the$AC$input$is$stable$for$a$continuous$period$of$15$days,$the$inverter$will$
start$a$battery$inverting$cycle$to$protect$the$battery.$After$1$cycle$normal$charging$and$AC$
through$power$will$be$restored.$$$
$
The$AC$Priority$and$Battery$Priority$switch$is$SW4.$When$you$choose$battery$priority,$the$
inverter$will$invert$from$battery$even$when$the$AC$input$is$present.$Only$when$the$battery$
voltage$reaches$the$low$voltage$alarm$point$will$the$inverter$transfer$to$AC$Input,$charge$the$
battery,$and$switches$back$to$battery$when$battery$is$charged$full.$This$function$is$mainly$for$
wind/solar$systems$using$utility$power$as$a$back-up.$
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Other!features!
Battery'voltage'recover'start'
After$low$battery$voltage$shut$off$(40V),$the$inverter$is$able$to$restore$normal$operation$after$
the$battery$voltage$recovers$to$52Vdc$(with$power$switch$still$in$the$“On”$position).$This$
function$helps$to$save$the$extra$effort$to$reactivate$the$inverter$when$the$low$battery$voltage$
returns$to$an$acceptable$range$in$the$renewable$energy$systems.$The$built$in$battery$
charger$will$automatically$reactivate$as$soon$as$input$AC$power$has$been$stable$for$15$seconds.$
$
WARNING:$$Never$leave$the$loads$unattended,$some$loads$(like$a$heater)$may$cause$accidents$
in$such$cases.$It$is$better$to$shut$everything$down$after$low$voltage$trip$than$to$leave$your$load$
on,$due$to$the$risk$of$fire.$
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Auto'Gen'Start'
The$inverter$can$be$customized$to$start-up$a$generator$when$battery$voltage$goes$low.$
When$the$inverter$goes$to$low$battery$alarm$levels,$it$can$send$a$signal$to$start$a$generator,$and$
turn$the$generator$off$after$battery$charging$is$finished.$$The$auto$gen$start$feature$will$only$
work$with$generators$designed$to$work$with$this$feature.$There$is$an$open/closed$relay$that$will$
short$circuit$the$positive$and$negative$cable$from$a$generator.$The$input$DC$voltage$can$vary,$
but$the$Max$current$the$relay$can$carry$is$16Amp.$
Conformal!Coating!
The$inverter$has$been$processed$with$a$conformal$coating$on$the$PCB$making$it$water,$rust,$and$
dust$resistant.$
Installation!
Location!
Follow$all$the$local$regulations$to$install$the$inverter.$
Please$install$the$equipment$in$a$location$that$is$Dry,$Clean,$Cool$and$that$has$good$ventilation.$
• Operating$temperature:$-10
℃
-40
℃
'
• Storage$temperature:$-40-70
℃
'
• Relative$Humidity:$0%-95%
，
non-condensing$
• Cooling:$Forced$air$
!
DC!Wiring!recommendation!
It$is$suggested$the$battery$bank$be$kept$as$close$as$possible$to$the$inverter.$$For$distances$up$to$
1m$(3ft),$“0”$wire$gauge$is$recommended.$$For$distances$of$1-5m$(3-15ft),$“00”$wire$gauge$si$
recommended.$$In$case$of$DC$cable$longer$than$5m,$please$increase$the$cross$section$of$cable$
to$reduce$the$loss.$
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AC!Wiring!
We$recommend$using$10-5Awg$wire$to$connect$to$the$AC$terminal$block.$

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Troubleshooting!Guide!
Troubleshooting$contains$information$about$how$to$troubleshoot$possible$error$conditions$
while$using$the$Inverter.$
The$following$chart$is$designed$to$help$you$quickly$pinpoint$the$most$common$inverter$failures:$
$
$
Status$
It
e
m$
Indicator'On'Front'Panel$
Indicator'On'Remote'Module$
$
Buzzer$
Utility$
Power$On$
Inverter$
On$
Fast$
Charge$
Float$
Charge$
Alarm$
Over-Temp$
Trip$
Over-Load$
Trip$
Power$
Save$On$
Charger$
On$
Inverter$
On$
Alarm$
Line$
Mode$
C.C$
√$
×$
√$
×$
×$
×$
×$
×$
√$
×$
×$
×$
C.V$
√$
×$
√,$Blink$
×$
×$
×$
×$
×$
√$
×$
×$
×$
Float$
√$
×$
×$
√$
×$
×$
×$
×$
√$
×$
×$
×$
Standby$
√$
×$
×$
×$
×$
×$
×$
×$
×$
×$
×$
×$
Inverter$
Mode$
Inverter$On$
×$
√$
×$
×$
×$
×$
×$
×$
×$
√$
×$
×$
Power$Saver$
×$
×$
×$
×$
×$
×$
×$
√$
×$
×$
×$
×$

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Inverter$
Mode$
Battery$Low$
$
×$
$
√$
$
×$
$
×$
$
√$
$
×$
$
×$
$
×$
$
×$
$
√$
$
√$
Beep$0.5s$
every$5s$
Battery$High$
$
×$
$
√$
$
×$
$
×$
$
√$
$
×$
$
×$
$
×$
$
×$
$
√$
$
√$
Beep$0.5s$every$
1s$
Overload$On$
Inverter$Mode$
$
×$
$
√$
$
×$
$
×$
$
√$
$
×$
$
√$
$
×$
$
×$
$
√$
$
√$
Refer$to$
“Audible$alarm”$
Over-Temp$On$
Inverter$Mode$
$
×$
$
√$
$
×$
$
×$
$
√$
$
√$
$
×$
$
×$
$
×$
$
√$
$
√$
Beep$0.5s$every$
1s$
Over-Temp$On$
Line$Mode$
$
√$
$
×$
$
√$
$
×$
$
√$
$
√$
$
×$
$
×$
$
√$
$
×$
$
√$
Beep$0.5s$
every$1s$
Over$Charge$
$
√$
$
×$
$
√$
$
×$
$
√$
$
×$
$
×$
$
×$
$
√$
$
×$
$
√$
Beep$0.5s$every$
1s$
Fault$
Mode$
Fan$Lock$
$
×$
$
×$
$
×$
$
×$
$
×$
$
×$
$
×$
$
×$
$
×$
$
×$
$
×$
Beep$
continuous$
Battery$High$
$
×$
$
√$
$
×$
$
×$
$
×$
$
×$
$
×$
$
×$
$
×$
$
√$
$
×$
Beep$
continuous$
Inverter$Mode$
Overload$
$
×$
$
×$
$
×$
$
×$
$
×$
$
×$
$
√$
$
×$
$
×$
$
×$
$
×$
Beep$
continuous$
Output$Short$
$
×$
$
×$
$
×$
$
×$
$
√$
$
×$
$
√$
$
×$
$
×$
$
×$
$
√$
Beep$
continuous$
Over-Temp$
×$
×$
×$
×$
×$
√$
×$
×$
×$
×$
×$
Beep$
continuous$
Over$Charge$
×$
×$
√$
×$
×$
×$
×$
×$
√$
×$
×$
Beep$
continuous$
Back$Feed$
Short$
×$
×$
×$
×$
×$
×$
×$
×$
×$
×$
×$
Beep$
continuous$
Symptom'
Possible'Cause'
Recommended'Solution'
Inverter$will$not$turn$on$during$
initial$power$up.$
Batteries$are$not$connected,$loose$
battery-side$connections.$
$
Low$battery$voltage.$
Check$the$batteries$and$cable$
connections.$Check$DC$fuse$
and$breaker.$
$
Charge$the$battery.$
No$AC$output$voltage$and$no$
indicator$lights$ON.$
Inverter$has$been$manually$
transitioned$to$OFF$mode.$
Press$the$switch$to$Power$saver$
on$or$Power$saver$off$position.$

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AC$output$voltage$is$low$and$the$
inverter$turns$loads$OFF$in$a$short$
time.$
Low$battery.$
Check$the$condition$of$the$
batteries$and$recharge$if$
possible.$
Charger$is$inoperative$and$unit$
will$not$accept$AC.$
AC$voltage$has$dropped$
out-of-tolerance$
Check$the$AC$voltage$for$
proper$voltage$and$frequency.$
Charger$is$supplying$a$lower$
charge$rate.$
Charger$controls$are$improperly$
set.$
Low$AC$input$voltage.$Loose$
battery$or$AC$input$
connections.$
Refer$to$the$section$on$
adjusting$the$“Charger$Rate”.$
$
Source$qualified$AC$power..$
Check$all$DC$/AC$
connections.$
Charger$turns$OFF$while$charging$
from$a$generator.$
High$AC$input$voltages$from$the$
generator.$
Load$the$generator$down$
with$a$heavy$load.$
Turn$the$generator$output$
voltage$down.$
Sensitive$loads$turn$off$temporarily$
when$transferring$between$grid$
power$and$inverter$power.$
Inverter's$Low$voltage$trip$voltage$
may$be$too$low$to$sustain$certain$
loads.$
Choose$narrow$AC$voltage$in$the$
DIP$switch.$
Warranty!
We$offer$a$1$year$limited$warranty.$
$
The$following$cases$are$not$covered$under$warranty:$
• DC$polarity$reverse.$$The$inverter$is$designed$without$DC$polarity$reverse$protection.$A$
polarity$reverse$may$severely$damage$the$inverter.$
• Wrong$AC$wiring$
• Operating$in$a$wet$environment.$
• Operating$with$an$undersized$generator$or$generator$with$unqualified$wave$form.$
$