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1. Visual Inspection: Flat board surface without cracks / Anti-corrosion treatment of bracket / Screws tightened without loosening. 2. DC Side: MC4 connector tightened and waterproof / Cables protected by conduit / Sufficient slack for easy maintenance. 3. AC Side: Independent circuit breaker + leakage protection / Bidirectional energy meter replaced / Terminal blocks tightened. 4. Grounding: Inverter casing / bracket / Grounding wire specification ≥ 4mm² continuous without joints. 5. Inverter: Normal grid connection and startup / Normal parameter display / Switching to off-grid mode within 20ms. 6. Monitoring: Successful APP binding / Data consistent with screen / Obstruction test alarm normal.
1. Risks of Mixed Use: Internal resistance mismatch leading to uneven current distribution, BMS protocol incompatibility, and wasted capacity. 2. Expansion Methods: New battery of the same model/BMS master-slave mode/Independent system/Complete replacement 3. Operation Steps: Confirm inverter support → Individual activation test of new battery → Power off and connect → Debugging and monitoring 4. Common Problems: New battery overheating/System alarm mismatch/Incomplete charging/Discharging/Efficiency reduction 5. Solutions: Reduce load, update firmware, recalibrate BMS, set new battery to charge-only mode 6. Conclusion: Mixed use is generally not recommended. The optimal solution is to expand capacity using the same model, with an independent system as the second choice.
1. Causes of cracks: Hail impact, thermal stress, installation pressure, handling bumps, aging. 2. Four-step assessment: Check crack location/shape/whether it is expanding/whether it affects power generation. 3. Level 1: Minor: Fine scratches/hairline cracks, impact <5%, no treatment required, continue use. 4. Level 2: Moderate: Obvious cracks that do not penetrate, impact 5%-15%, requires continuous observation. 5. Level 3: Severe: Through-crack/glass shattered, impact 15%-50%, must be replaced. 6. Level 4: Completely broken/frame detached, immediately disconnect power and replace.
1. Impact on power generation: Power generation drops to 10%-30% of sunny days on cloudy days, and only 1/5 of sunny days after a week of cloudy/rainy weather. 2. Three-stage effect: Daytime charging and discharging → Nighttime battery power supply → Battery depletion during continuous cloudy days. 3. Range reference: 10 kWh battery lasts 1-7 days, 20 kWh lasts 2-14 days, 30 kWh lasts 3-21 days. 4. Configuration recommendation: Designed to last at least three days, with a power rating slightly higher than the inverter. 5. Practical tips: Use high-power appliances during the day, pay attention to weather forecasts and plan ahead. 6. Extreme solution: A hybrid of photovoltaic + energy storage + diesel generation, suitable for "uninterrupted power" needs.
