User's Manual

REV03‐13
BlownPowerInverterFuses
Yourpowerinverterisequippedwitha20‐ampspadetypefuse.Withreasonablecareitshouldnotbenecessary
toreplacethesefuses.Mostblownfusesaretheresultofreversepolarityorashortcir cuitwithintheapplianceor
equipmentbeingoperated.Ifthefusehappenstoblow,disconnect
theapplianceorequipmentimmediately,find
thesourceoftheproblem,repairit,andthenins t allanewfuse.
SourceofPower
Mostautomobileandmarinebatterieswillprovideanamplepowersupplytotheinverterfor30to60minutes
evenwhentheengineisoff.Actualtimemayvarydependingupontheageandconditionofthebattery,andthe
powerdemandbeingplacedonitbytheequipmentbeingoperated
withtheinverter.
Ifyoudecidetousetheinverterwhi le theengineisoff,werecommendthatyoustarttheengineeveryhourand
letitrunforapproximately10minutestorechargethebattery.Wealsorecommendthatthedevicepluggedinto
theinv erterbeturnedOFFbefore
startingthevehicleengine.
Althoughitisnotnecessarytodisconnecttheinverterwhenturningovertheengine,itmaymomentarilyceaseto
operateasthebatteryvoltagedecreases.
Whenthein verterisnotsupplyingpower,itdrawsverylowamperagefromthebatteryandmaybeleftconnected
tothe
batteryforuptothreehours.
However,werecommendtheinverteralwaysbedisconnectedwhennotinuse.
InverterProtectionFeatures
TheREDLEDIndicatorlightwillturnonandtheinverterwillturnitselfoffautomaticallywhen:
1. Thepowerinputfromthebatterydropsto9.5volts.(Whenthepowerinputdropsto10.5volts,analarmwill
soundforanextendedperiod).
2. Thepowerinputfromthebatteryexceeds
15.5volts.
3. Thecontinuousdrawoftheequipmentorappliancebeingoperatedexceeds200watts.
4. Thesurgedrawoftheequipmentorappliancebeingoperatedexceeds400watts.
5. Thecircuittemperatureexceeds165°F.
Note
• Theinverterisequippedwithacoolingfanwhichisdesignedtoruncontinuouslywhiletheinverteris
operating.Automaticshutdowncausedbyhighcircuittemperatureswilloccurwhenthecoolingfanis
unabletomaintainacoolenoughtemperatureforsafeoperationoftheinverter.
• Inthe
eventofautomaticshutdownorcontinuousaudiblealarm,turntheinverterrockerswitchtothe
OFF(0)positionuntilthesourceoftheproblemhasbeendeterminedandresolved.
HowPowerInvertersWork
There are two stages in which a power inverter changes the 12‐volt DC (or battery) power into 110V AC
(householdcurrent).

STAGE1:
TheinverterusesaDC‐to‐DCconvertertoincreasetheDCinputvoltagefromthepowersourceto145voltsDC.

STAGE2:
Theinverter
thenconvertsthehighvoltageDCinto110VAC(householdcurrent),usingadvancedMOSFET(Metal‐
oxide‐SemiconductorFieldEffectTransistor)transistorsinafullbridgeconfiguration.Thisdesignprovidesallour