I can vouch for these (sorry this is a UK link)
I use the 48v 4000W version and 8 x 6V Trojan 225ah batteries with 6 x 250W panels. the inverter was a gamble but turned out to be well made.
https://www.ebay.co.uk/itm/SOLAR-HYBRID-INVERTER-800W-1000VA-12V-PURE-SINE-WAVE-WITH-CHARGE-REGULATOR-50A-/301398317365?pt=LH_DefaultDomain_3&hash=item462cbd5935
