I have all sorts of stuff up to 500a diesel Lincolns.......and Ive been very impressed with the little box inverters sold by the proper trade shops........seem to be the same price as the hardware store /supermarket units ,but come with much heavier leads and a decent rod holder and earth......Now these units here cost around $160 A,which IMHO makes them throwaway........I might add ,we had an Esseti inverter ,when the inverters first came out....it cost $1200,and broke down frequently ,needing repeated $400 repairs,that often took weeks....So some things do improve.