Hello, there is basically no good solution to this problem. The only solution is to replace the water tank or set the smart mode in the meter to set the constant water temperature, but this will consume a lot of electricity!
Recommended "Dr. Sun" solar energy, three warehouse models (no need for water level probes and solenoid valves), heating and hot water utilization rates are fast in rainy weather, and the after-sales service rate is also greatly reduced, saving time. It also saves electricity. This model only takes 20-30 minutes to heat without sunlight, while a single warehouse takes 2-3 hours