So far so good. It has been running on an off-grid solar house for about 4 months without any problems. I switched from a 12 volt battery system to a 48 volt system. This is much more efficient than a 12 volt system. I haven't tried heavy weights like saws and drills yet. To update. 04/30/2021. It's been over a year since I installed this inverter and still no problems. The inverter runs 2 freezers, internet, microwave and more 24/7. The only thing I've seen is that the AC unit has trouble starting and causes enough voltage drop to turn the TV off. I ordered a 6000 watt unit so we could have some extra power from the same company but it only took 24 hours. The 4000w version doesn't seem to have good reviews for the 3000w version otherwise I would have bought it. The 5000W version is not available anywhere. I'll review every unit I buy, but this 3000w unit seems pretty solid.
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