gpwengineer

To meet the specification they are selling, you need the Goodwe GW6000 ES20 installed. The Goodwe GW5048D_ES is the older model from this series and it is about to be discontinued. https://en.goodwe.com/Ftp/EN/Downloads/Datasheet/GW_ES G2_Datasheet-EN.pdf

Then it would be easy to flash the Deye Inverter to a Sunsynk Inverter....

Biggest issue with Victron is if you fall within City of Cape Town Municipality or your municipality requires you inverter to be NRS097-2-1:2017 compliant. Only Victron's 3kVA & 5kVA Multiplus II is approved for CoCT installation out the box. So there is 3 options if you require more power from the inverter system and remain compliant...either you 1) parallel the 5kVA/3kVA inverters up to the capacity you need, 2) purchase and install an expensive Zhiel relay (Not always approved), 3) Configure the system with a Fronius PV Inverter (or similar) that is on the approved list. I honestly don't know why Victron is dragging their feet to get the rest of their inverter range NRS097-2-1:2017 approved. I can't fault the actual product, support or reliability...it works brilliantly and I would definitely prefer this to Sunsynk if price is not an issue.

Installers prefer Victron due to their robust RMA policy (warranty). Always stock available and RMA processed within a day or two. Sunsynk currently has a 6-8week waiting period for replacement units. So, to save their reputations, reputable solar installers rather purchase new Sunsynk units for clients and then sell the faulty units after it has been fixed. Added to this, the training and reliability of the Victron is excellent. Also the Victron uses robust toroidal transformers. Nothing against Sunsynk, but only time will tell if the Sunsynk units stands up to the Victron