Voltage vs. PWM controller & wire size
Ok, there is a recent thread out there MPPT vs. PWM and some post were a little confusing to me. Instead of hijacking his thread I started a new one. My set up is two 208 watt Sony panels with 28....
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Calkidd wrote:Correct for 120V AC draw. For an inverter to run the MW it would draw about 110A at 12V DC. My MW is 1500W so about 160A draw from the battery.
I'm still absorbing what others have written regarding the difference between controllers.
I want to address the current draw while using an inverter on an RV. Some say the microwave will pull a 170 amps. Are you using a 12-volt microwave? Ohm's law does not make sense in this situation. Let's take a 1000 watt microwave oven using 120 volts it's only going to pull less than 10 amps. So how are we coming up with a 170 amp draw?
The basic rule of thumb is inverter AC draw requires 10x DC draw. I use 11x to better account for conversion losses.
