Should I Shut Down My Home Solar Inverter System When Traveling During Holidays?
No, you don't need to blindly shut down your home solar inverter system when you're traveling during holidays. The key is to adjust the system flexibly according to the length of the holiday, keep it running for short periods and shut it down properly for longer periods. This ensures equipment safety and extends battery life. Specific operations and precautions are as follows: For short holidays (1-2 weeks), there's no need to completely shut down the system. Maintaining normal on grid or off grid operation is safer. It's recommended to prioritize turning off non-essential loads such as air conditioners, water heaters, and kitchen appliances, leaving only low power devices like network and security monitoring powered to avoid unnecessary energy waste. If your system has built in "Holiday Mode," you can activate it directly. If not, manually set the charging and discharging parameters: set the upper limit of battery charging to 80% and the lower limit of discharging to 20%-30%. This prevents the battery from aging rapidly due to prolonged full charging and avoids irreversible damage from deep discharge. Be sure to bind the system to a mobile app, enable remote monitoring, and set alarms for over temperature, over voltage, and low battery conditions to easily monitor the equipment status in real time and respond promptly to emergencies. This method not only leverages an intelligent BMS to automatically regulate charging and discharging, reducing manual intervention, but also ensures power supply to basic equipment during sudden power outages, balancing practicality and safety.
For extended periods of absence (more than one month), the solar inverter system can be shut down according to standard procedures to reduce potential risks during unattended operation. The shutdown procedure should follow the sequence of "disconnect load first, then input, and finally battery": First, turn off the inverter's AC output switch to completely disconnect all electrical equipment; then, turn off the photovoltaic DC input switch to stop battery charging; for on grid system, the grid input switch must also be disconnected to ensure complete electrical isolation; after the inverter has completely shut down, disconnect the battery main circuit breaker to allow the system to enter long term storage mode. Before shutdown, it is crucial to adjust the battery charge: lithium battery (lithium iron phosphate or ternary lithium) should be charged to 50%-60%, and lead-acid batteries should be charged to around 80%. Avoid storing batteries at full or low charge levels, long term full charge of lithium batteries accelerates capacity decay, and low charge storage of lead-acid batteries may cause sulfation, affecting subsequent use. Whether maintaining operation for a short period or shutting down for extended period, general safety and maintenance points must be emphasized. Before leaving the premises, check that the system's lightning and overvoltage protection devices are functioning properly to avoid damage from lightning strikes during the holiday. Also, ensure that the energy storage equipment is installed in a well ventilated and dry environment, away from high temperature and humid areas, to prevent environmental factors from affecting battery performance and component lifespan. Before restarting after a long period of shutdown, check that the battery voltage is normal and that wiring connections are secure and undamaged. Once everything is confirmed to be normal, gradually power on the equipment in reverse order to avoid sudden high voltage surges.
Different battery types require specific considerations when handling them during holidays. While lithium battery (including lithium iron phosphate and ternary lithium) have good self discharge management capabilities and the BMS can effectively control power loss, the main switch still needs to be disconnected during long term shutdowns, and the optimal storage capacity of 50%-60% should always be followed. Lead-acid batteries require extra care to avoid deep discharge. Before long term shutdowns, charge to 80%, and if conditions permit, schedule a recharge every 1-2 months to prevent sulfation crystallization inside the battery, which affects range and lifespan.
While there is no fundamental difference in operational details between on grid and off grid system, on grid system require close monitoring of the grid input switch's open and closed status to avoid grid fluctuations affecting the equipment. Off grid system require ensuring that the solar panels are unshaded before holidays and can recharge the batteries normally during short term operation to avoid battery depletion due to insufficient sunlight.
The above information aims to help you and your family correctly use your solar inverter system before traveling. Xindun Power primarily manufactures off grid inverter. As a source manufacturer of inverter, Xindun Power can provide you with comprehensive solutions for building a complete home solar inverter system.
