comments:
Youre gonna need a pretty honking big battery to run a 1hp motor for 8 hours. 745w to 1hp, 8 hours, little under 6kw hours needed without factoring in any inefficiency, convert to AH for a more googleable unit and you need a 12v battery with around 500ah of capacity. Even the fancy LiFePO4 batteries tend to cap at about 300ah so youd need at least 2, and those aint cheap... Course, im going with 8 hours for a worst-case scenario, if you arent running this for a straight 8 hours then yes, you can get away with less battery Other problem is one of wiring. Not difficult to find an inverter with the 2000w continuous output youd need (120v*10amps=1200 watts, overhead for startup current and other unknowns youd want to go 1500w at minimum, 2000w is a lot more common), but in order to get 2000w out, you need to put at least 1200w in, and 1200w/12v=100amps of constant load, youre gonna need some beefy wires to stay safe, 4 gauge would work if all the runs were short, 2 gauge would give you more safety Third problem is charging. Batteries charge a lot slower than they discharge, if youre draining one of those 300ah LiFePO4 batteries over the course of a day, youre gonna be waiting a pretty solid amount of time for it to charge. If you somehow manage to cap out the charge rate of one of those batteries by pumping 150a into it, youre still looking at close to 3.5 hours to recharge, but assuming you plan on sticking to a more standard 120v input charger at the end of the day, youre looking at more like 20-40 amps of charge current and closer to a full 24 hours to charge on the lower end, maybe 12 on the higher end This is a lot of numbers to just say that this just aint a great application for battery power, on both cost and effectiveness. You would be wildly better served with a suitcase-style generator, they put out more than enough power for the application and are incredibly quiet (57-60db for the small ones, about the same volume as a refrigerator). If your clients are allergic to the site of a gas can, get a dual-fuel model that runs off propane, youll put out considerably less harmful emissions while still being able to get the job done If youre determined to go this course, running an AC motor isnt a demanding task, pretty much any inverter of a sufficient rating will manage fine. I can personally attest to the quality of this one, pumps out plenty of power and the pure-sine output doesnt fry my tools. Not important in this context, AC motors dont care about waveform, but nice to have all the same