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tfirma's avatar
tfirma
Explorer
Oct 29, 2015

Question about inverter use and power draw on batteries

I will apologize right off the bat - this is both probably a newbie question - and also a bit convoluted. So my brand new 1995 Lance has two 12v outlets... I was trying to run a 150W inverter ...
pianotuna's avatar
pianotuna
Nomad III
Oct 29, 2015
85 watts for the laptop equates to 8.5 amps @ 12 volts. The existing batteries are compromised in some way.

Check to see if the electrolyte is covering the plates. If it is not add just enough distilled water to do so then fully charge them--say for 168 hours at 13.2 volts.

After they are fully charged then disconnect them from the RV and do an equalization charge at 16 volts. Then check the specific gravity in each cell using a temperature compensated gauge.

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