40 Amp draw from batteries to run Microwave?
When running my microwave on high I noticed the battery voltage dipped to 11.6 and the input side of the 2,000 Samlex inverter was only drawing 40 DC amps or so. I didnt think that 4 T105's voltage...
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No, 40 amps does not seem correct less it's one very small Microwave. 100 amps is more what I'd expect a Microwave to draw.
how to estimate battery draw for 120 volt appliances
Watts = Volts times Amps times Power factor
Volt-Amps (if listed) = Volts times Amps
For a Microwave the power factor can approach ONE so we will use that
Assume a battery voltage at the inverter of 10 (this is not correct but there are several things that need to be factored in like conversion efficiency and Inverter "overhead" and such and using 10 volts is an easy way to factor them in at currents less than 100 amps it's fairly close)
Watts/10
So your Microwave must be about a 400 Watt model
how to estimate battery draw for 120 volt appliances
Watts = Volts times Amps times Power factor
Volt-Amps (if listed) = Volts times Amps
For a Microwave the power factor can approach ONE so we will use that
Assume a battery voltage at the inverter of 10 (this is not correct but there are several things that need to be factored in like conversion efficiency and Inverter "overhead" and such and using 10 volts is an easy way to factor them in at currents less than 100 amps it's fairly close)
Watts/10
So your Microwave must be about a 400 Watt model
