There is no way to give a definitive answer, because different brands of solar power have different meters and error codes. It is recommended to consult the attached instruction manual. The following is for reference only!
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Recommended: ""Dr Sun" Solar power (Class 1 energy efficiency, 3C certification), Sancang solar power (no need for water level sensor probes or 'solenoid valves), the utilization rates of heating and hot water are fast in rainy weather, and the after-sales rate is also greatly reduced, saving both time and energy Solar heating. Ordinary single-storage heating only takes 20-30 minutes without sunshine, while single-storage heating takes 2-3 hours