Fine, but I never said that I have to sustain 200 amps. I only mentioned that as a if a buy a generator do I have to push 200 amps? I am after backing up one 20 amp circuit. Long term, I'm thinking about a natural gas powered 8 KW generator. That should run 3 twenty amp circuits handily and almost a fully loaded 15 amp light circuit as well.
Are marine batteries safe indoors? How much ventilation is needed? How do I figure out the amp hours of a particular marine battery? On Sun, 2010-11-07 at 08:20 -0800, Erik Lane wrote: > You want to run 200 amp 120V service off of batteries? I hope you have > deep pockets! You would need a battery room the size of a good garage > to run that for any length of time. A large battery could be rated at > 200 amp hours, so that would put out 200 amps for one hour. (Well, if > you were trying to drain it that fast it wouldn't last for an hour. > Those ratings are for a much lower drain at a time.) But that is only > at 12 or 6 volts. So if it is at 12 volts then divide it by 10 and > subtract off the losses for the inverter. So one battery might provide > something like 20 amp hours of service doing 120 V AC if you have a > very good inverter and have a bunch of batteries so the drain on each > one wasn't too much. And these are the BIG batteries that cost mucho > dollars. I did a quick search and found some that costed $400-600 > dollars each. I have no idea if you can get them cheaper, but you > would need so many of them that you probably don't have room, even if > you had the money. > > You're just not going to get around that trying to provide that much > power is not going to be cheap. You're talking about large amounts of > power. The generator that John is talking about that provides power > for all the basics to survive a power outage is only providing ~45 > amps at 120V, assuming it can put out that peak power continuously and > everything is working well. > > But really, if you need this kind of power and backup solutions then > you're going to need to pay for it. You should really be talking to an > expert in the field about what your realistic options are. > > Erik _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
