Quote:
Originally Posted by Hockeyguy15
Edit: Oh, that and the thermostat in the fridge/heater would also be electric.
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I bought a DC power meter designed for people who have model airplanes, and used it to test how much power various things draw off the batteries. The numbers are all watts, so divide by 12 to get amps. A few things that I tested:
Stereo (in standby mode) and CO detector- 2 watts (Both are on same circuit)
1157 LED bulbs- 3.3 watts (each)
921 LED bulbs- 1.1 watts (each)
Stereo playing USB video; volume between 2 to 4- 14 watts
Stereo playing USB video; volume at 12- 18 watts
Furnace motor- 33 watts
RCA 19” TV- 20 watts
Antenna power booster- 1.5 watts
Water pump- 36 watts normally, 48 watts surge at startup
Water heater- 8 watts constant
Fridge- 3.5 watts constant
The water heater was a bit of a surprise. So even when it isn't firing it has a significant drain on your battery. That will take 16 of your amp hours away per day if you left it on 24/7. So now when I dry camp I only fire it up when I need it.
I don't have the numbers in front of me, but I seem to recall my test on an incandescent 921 bulb was right around 20 watts. So the LED bulbs are significant in how little power they draw.