Specifications

REV03‐13
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th e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configura tion.Thisdesignprovidesallour
inverters withthecapabilitytostartandrundifficultreactiveloads,whi leprovidingexcellentoverloadcapability.
Thewaveformthatis
generatedbythisconversionisa"modifiedsinewave"asshowninthediagrambelow.




The modified sine wave produced  by our inverters has a root mean square (RMS) voltage of 110 volts. The
majorityofACvoltmetersarecalibratedforRMSvoltageandassumethatthemeasuredwaveformwillbeapure
sine wave. Consequently, these meters will not read the RMS modified
sine wa ve voltage correctly and, when
measuring the inverter output, the meters willread about 20 to 30 volts too low. To accurately measureof the
outputvoltageoftheinverter,useatrueRMSreadingvoltmetersuchas aFluke87 Fluke8060ABeckman4410,
Triplet4200oranymultimeter
identifiedas"TrueRMS"
