Got a BIG One? Come in here.....

For those of you with 2500 watt inverters and a volt meter on your dash, what happens when you turn on, lets say, your Microwave?

I have been having a SERIOUS voltage drop issue lately. I show 14.1 volts, then I turn on the microwave or coffee machine and then she starts to fall:

13.9, 13.8, 13.7, 13.6, 13.5, 13.4, 13.3, 13.2 then BAM! Back up to 14.1

Why, BECAUSE WHEN IT DROPPED TO 13.2 IT BLEW MY FUSE/CIRCUIT BREAKER

So, I had them change out my alternator thinking this was the problem, but NOPE, still does it. I tried a smaller inverter and she drops too.

Any ideas?

 

Well the inverter is grounded in TWO places, once to the battery and once to the chassis. It may be a bad battery or two, I will try switching the Positive to another battery in the bank of 4.

 

I switched to the other side of the batteries and I think that fixed it...she holds firm at 13.8. Yes, I may have a bad battery or two, but I will get that checked later.