joe6789 wrote:
time2roll wrote:
dropping 1 or 2 volts is too much for no load. Dropping to 1 or 2 volts is a defective battery or open connection. Where exactly are you measuring the voltage? Inverter should pull no more than 2 amps at idle that might show 0.1 volt drop in battery voltage.
Yes, I believe it's some sort of open connection, possibly between the ground of the inverter and the ground of the DC load bus bar.
When only the inverter is hooked to the battery, the battery stays at ~13 volts and 0.7 amps are drawn by the inverter at idle.
The problem is only when I hook up both the inverter and the normal DC loads -- then the voltage essentially drops to 0. I'm measuring voltage between the positive and negative terminal of the battery. As soon as I hook all the cables up, the multimeter actually shows about 6 volts, but then a second later drops to 5 volts, and continues dropping to 4 volts, 3 volts... and settles at 1 or 2 volts after about 10 seconds.
If I disconnect the inverter or disconnect the DC loads, the battery voltage jumps back up to 13 volts and everything functions normally.
How are you measuring the voltage, via victron meter??...Have you installed a shunt (in neg cable), and if so is it wired correctly??
On edit I believe your battery is toast... The auto parts store can do a carbon pile-load test to verify...
