Convert 110 house current to 12 v.

[Bits]

I have a super winch 12 volt LP 8500 that I want to use using an inverter from my household current. The motor is 12volt 4.5 hp 3.3 kw.
I have tried to use a battery with my battery charger but the battery does not hold enough charge without have a vehicle that has an alternator.
Is there a good inverter that would allow me to use this winch without having to use a truck.
Thanks,

Bits

 

[berkeman]

I have a super winch 12 volt LP 8500 that I want to use using an inverter from my household current. The motor is 12volt 4.5 hp 3.3 kw.
I have tried to use a battery with my battery charger but the battery does not hold enough charge without have a vehicle that has an alternator.
Is there a good inverter that would allow me to use this winch without having to use a truck.
Thanks,

Bits

3.3kW is 30 Amps at 110Vrms. That's near the limit for a house branch circuit...

 

[russ_watters]

...and 275 amps at 12V! I'm not sure there is an easy way to continuously power this from a household circuit, but if you are only trying to run it a few minutes at a time, a bank of car batteries with a big charger would let you use it a few hours a day. Here's a 90 A charger: http://www.batterystuff.com/battery-chargers/brands/iota/IOTA-DLS1290.html

Perhaps you could wire 3 of them in parallel?