Battery recommendations for 1500W inverter
Does anyone have recommendations for a 12V battery setup that can power a 1500W inverter? The background: my travel trailer is currently powered by two 6V golf cart batteries (Duracell SLIGC110 215...
Forum Discussion
As noted above, I measured the voltage dropping to ~10.5V at the battery terminals when I turned on the microwave, so the wiring wouldn't be a factor in that. FWIW, the inverter is connected to the batteries via 4 AWG cables, maybe 5' long, which should have a resistance of around 0.001 ohm each. At 120A, that would result in a total drop of 0.24V, not enough to be significant, assuming the connections are all good.
So, based on that, I think the batteries are the most likely culprit, and the voltage drop I measured (at the terminals) with a smaller load gives me an internal resistance that would easily explain a >2V drop.
Mostly I'm just looking for someone else running a 12V 1500W (or greater) inverter to get some insight into what battery setup they have.
And all of this is completely separate from the discussion about how long the batteries will last. I'm only planning on running the MW for a couple of minutes a day. 5 mins @1500W = 12.5Ah, so not a problem. The issue is how to get the required 120A or so of current out of the batteries without the voltage dropping below 10.5V.
So, based on that, I think the batteries are the most likely culprit, and the voltage drop I measured (at the terminals) with a smaller load gives me an internal resistance that would easily explain a >2V drop.
Mostly I'm just looking for someone else running a 12V 1500W (or greater) inverter to get some insight into what battery setup they have.
And all of this is completely separate from the discussion about how long the batteries will last. I'm only planning on running the MW for a couple of minutes a day. 5 mins @1500W = 12.5Ah, so not a problem. The issue is how to get the required 120A or so of current out of the batteries without the voltage dropping below 10.5V.
