Join Date: Dec 2001
Location: Belleville, Illinois
Thanked 16 Times in 11 Posts
Re: Power inverter ?
A 750 Watt inverter will be marginal for a big Sawzall. 750 Watts is only 6.25 amps at 120 volts. I got a 2000 Watt inverter at Harbor Freight for $150.00, and it runs my big Sawzall and SDS Max hammer drill without a whimper. For small jobs it can run off the battery without running the engine. About 15 minutes hard work with an angle grinder runs the battery down enough to turn on the alarm.
For big jobs a generator is the way to go, but for little stuff, the inverter is SO much more convenient - flip the switch and plug the tool in. No gasoline, no oil changes, no tuneups, no pull starter . . .
An inverter uses a lot of current from the battery. A tool that uses 5 amps at 120 volts will be drawing 50 amps out of the battery, plus loss in the inverter. That means that the wiring to the inverter must be BIG. I wired the 2KW inverter with 0-gauge welding cable and a 300 amp fuse.