Hey Tom,
I've got 3ea- Group 27's (Walmart Deep Cycle Marine Batteries).
Wish I'd known more about batteries when I purchased them last year, I would have gotten T-105's instead. Oh well, live and learn.
Since my last post, I tried the inverter with our refrigerator, just to see how it works. So far, so good, the voltage on my batts. has actually leveled off at around 12.4V when not under heavy load and drops to around 12.2V when the refer. kick in.
Conclusion:
I think that the near 11.0V that I was seeing earlier was due to my computer monitor, I had my 'puter, printer, dsl modem, wireless modem, usb port hub, 19" monitor, scanner and speakers all plugged in, draws more than I thought, no wonder the elec. bill was a bit higher when I left it on 24/7.
Anyway, the refer. is a 21.5 cu ft Kenmore and is around 5.4 amp max and seems to be doing just great after an hour or two. This is good, cause that's why I got this inverter, as a backup for the refer. and maybe to power a small TV or radio during a power outage. I think it's going to work out. I'm thinking of leaving the refer. on the inverter overnight to see how the batteries hold up.
Tomorrow, I'm going to hardwire 2 circuits from a 2-breaker load center which will place an auxilary receptical near the referigerator, one in the living room and on the other circuit I have 2 more recept. in the bed rooms. The load center just plugs into the inverter.
Later,
Dave