Routine maintenance primarily involves equipment inspection, cleaning, and status monitoring. Maintenance costs are relatively low (approximately 1%-3% of the total equipment price annually). Specific tasks are as follows:
Daily/Weekly Inspections:
Check the system display screen: Confirm battery level, charging/discharging status, and component temperatures (battery temperature ≤ 45°C is normal). If "overcharge, over-discharge, or high temperature" alarms occur, immediately stop the system and investigate.
Inspect the exterior: Check for damage or obstructions to the solar panels (e.g., fallen leaves, dust), for water leakage or unusual noises in the energy storage battery cabinet, and for loose wiring terminals.
Monthly Maintenance:
Clean Solar Panels: Wipe the panels with clean water (or with a neutral detergent) to remove dust and bird droppings (dust accumulation can reduce power generation efficiency by 10%-20%). Avoid scratching with hard objects (to prevent damage to the panel coating).
Check Batteries and Inverter: Use a multimeter to check the voltage of individual battery cells (the voltage of a single lithium iron phosphate battery cell should be around 3.2V, with a voltage difference ≤0.1V for normal operation). Check if the inverter's cooling fan is working properly (fan failure can cause the inverter to overheat and shut down).
Quarterly/Annual Maintenance:
Tighten Terminals: Long-term operation may cause loose connections. Tighten the battery and inverter connection screws with a wrench (power off operation only);
Battery Balancing Maintenance: Balance the charging of individual battery cells via the BMS system (correcting capacity differences and extending battery life). Residential users can contact the manufacturer for remote operation; commercial and industrial users require on-site maintenance by a professional;
Annual Inspection: Invite the manufacturer or a third-party organization to inspect system efficiency and battery capacity degradation (after 3 years of normal use, battery capacity degradation ≤20% is considered acceptable). Replace aging components (such as inverter fans and battery connection cables).