Best provider to get solar panels and battery?

Hi I’ve been doing some googling and we will save 600 a year minimum getting solar and battery.

Have x2 EV so charge them at night, I figure use solar in day and entering we don’t use charge up the house battery.

I’ve have a good look round and with boxt look to have the best offer with x12 AIKO NEOSTAR 3S Bi-Facial Dual-Glass 475W with an inverter at a cost of &43 a month which seems a no brainer to me.

Any thought tips of advice greatly appcheerspanels and a Sunsynk W5.3 battery 5.3kw