Hi, I have a New system of 2x MultiPlus II 48/3000/35-32, SSC MPPT 250/100, BYD battery box and Venus GX. The system is currently set up that any excess energy (after batter is fully charged) is used to power a water heater. This is done through relay ( between 100% to 96% of SOC the solar energy is used to power up the heater).
However I run an issue when the solar power is not sufficient to power up the heater or the whole system, the excess energy is taken from grid, not from battery - even though there is sufficient battery capacity. As a result I’m running quite substantial grid consumption when there fluctuation in solar power. Could you please advise what could be the solution to also use the battery power to help during the solar fluctuation?