CGoode Sigenergy look to have some great kit, and installers love them as they are easy to install, but they are not cheap.
Some people on here have suggested dumping their GivEnergy kit for Sigenergy, but financially it’d be a massive step to make, with any kind of payback underpinned by assumptions on what happens to import and export rates long term. I think its likely import rates will continue to go up but export rates, particularly during the day, will go down.
And I’d be concerned that you’d just be swapping from one closed inverter/battery ecosystem (GivEnergy) to another (Sigenergy). You’re wholly reliant on the ongoing support of that manufacturer, and who knows what will happen over the next 5 years or so.
Pity I would have quite liked an extra 9.5 battery even though fitting it in to my already full garage would be a challenge!