I just had Solaredge battery installed in my house in the UK (Had a solaredge PV and inverter so made sense even tho it was more than other setups). If you are up for a challenge https://springfall2008.github.io/batpred/ is AMAZING and basically optimises when to charge and discharge your battery.

I've got a heat pump and think my paypack period is going to be about 6 years.

Hit me up on bluesky (in profile) if you want more info!