Review on ⚡ KISAE SW1220 True Sine Wave Power Inverter - 2000W by Kipp Amundson

I am a locksmith and have been using this inverter for 3 years to power my key machine (and other things like grinders) with no problems. It doesn't work well with a 15 amp 7 inch grinder as the actual peak is higher. As for the pure sine wave, my key machine ($7,000) worked perfectly. I'm not an electrician and I don't have enough understanding of the dynamics of electricity to be sure this isn't a 'true' pure sine wave inverter, but I can safely say that my machine appears to be fine and only this machine requires a pure sine wave due to the tolerance (0.001 inch) required for the precise manufacture of various keys. That's it, if it's not a real stone wave or a real pure sine wave inverter it will be great for whatever it takes and that's what matters to me. For the record, I have friends who have burned their $7,000 key car just like mine with modified sine wave inverters. Those are the facts, you are the judge, I hope this helps!