Understand too that (whether sine wave or square wave), when it comes to power tools and pumps, all seemilgly equivalent 2000w inverters are not the same... Electric motors are reactive loads, thus what must be considered is the nominal wattage of the load along with an imputed 4-5 times that amount that occurs briefly upon motor start-up.... Inverters see reactive loads vs resistive loads (like a hair dryer...) quite differently...Depending on the size of this load, some inverters of same advertised ‘like wattage’ (say, 2000w) may not be able to handle a high amp motor (particularly pumps and compressors) due to the initial start-up surge that must be overcome...
In your application, beyond advertised wattage I would also be interested in knowing the inverters surge rating and over what time period in seconds or milliseconds....Often this information is sometimes not published or can be hard to find, but knowing this can help avoid a costly repeat purchase of a different model...
The higher and longer the surge rating, the costlier the inverters electronic componants, thus bargain inverters need to be judged accordingly.... I agree that PSW is more efficient for the run requirements of electric motors....
Battery cable wire gauge and short lengths of cable runs iare also important - Larger is better (I’m running 4 ought, or 0004) ...
Hope this helps
3 tons