Power supply & Power inverter for boondocking

profdant139 wrote:
Niner, two ideas -- first, have you considered group 31 batteries, with 110 amp hours each? And 22 watts for the bulbs seems high -- warm white LEDs draw about 5 watts and give plenty of light.

These are the following figures for my 21 foot travel trailer, without a slide out.

I just did a power draw analysis with my Kill-A -Watt meter yesterday.

Parasitic draw in Amps at 122.V off my older EU2000i..


Parasitic .33 Amp

Plug in the 22" lcd TV, turned off .46 Amp

Water pump turned on, while pumping to near max pressure + above items. 1.88 Amps

Parasitic + TV plugged in + refrig 3.22 Amps

6 incandscent bulbs /3 light fixture2.17 Amps


lights plus my LED's all on. 2.26 Amps

5 LED's on in fixtures & TV .56 Amps

Water Heater on electric with parasitic 14.76 Amps. Usually run this on propane.

Charger is the variable, I have not run the battery low to 50% and seen the Amp draw yet on the motor.

If you want to save batteries and current drawn... run LED's instead of incandescents. I am still looking for LED's that will fit in those t-10 bayonet fixtures that will give an equal amount of light as a 22w 12v bulb.

My conclusion... if you can, run your generator in the evening/night, the last 3 hours before going to bed, if you can, or shut it off at 9 or 10 pm, and use a quiet generator. Your generator will be loudest when the charging rate is the highest/heaviest, right after start up.

I find that charging up 2x a day, 2.5 hours in the morning, and 2.5 to 3 hrs hours at night, seems to work best for me while boondocking.