I. Usage Plan

This plan is suitable for scenarios such as no mains power access, remote areas, and emergency power supply. It uses photovoltaic (PV) + lithium iron phosphate (LFP) energy storage as its core to achieve stable off-grid power supply.

System Configuration: Consists of PV modules, MPPT controller, LFP battery pack, and off-grid inverter. Capacity is calculated based on average daily electricity consumption and the number of consecutive cloudy/rainy days. The inverter has a margin of 1.2 times the total load to accommodate the starting impact of inductive loads such as air conditioners and water pumps.

Operating Mode: During the day, PV prioritizes power supply to the load, with excess power charging the battery. At night and on cloudy/rainy days, the battery discharges to supply power, with automatic BMS protection to prevent overcharging and over-discharging.

Load Management: Prioritize critical loads such as lighting, communication, and refrigerators; stagger the use of high-power equipment during off-peak hours to avoid overload tripping caused by simultaneous startup.

Maintenance Recommendations: Check SOC, voltage, and temperature daily; clean PV panels monthly; tighten wiring and check grounding and heat dissipation quarterly.

II. Customer Precautions

Installation and Environment: Installation must be performed by a certified electrician; the equipment should be placed in a dry, ventilated, dust-free, and non-corrosive environment, with a temperature range of -10℃ to 40℃; keep away from heat sources and open flames; lithium batteries must not be exposed to direct sunlight.

Electrical Safety: Unauthorized modifications to the wiring and overloading are strictly prohibited; disconnect the DC switch during thunderstorms; ensure reliable grounding with a grounding resistance ≤4Ω; immediately stop the machine if any unusual odor, noise, or overheating is detected.

Battery Maintenance: Maintain a State of Charge (SOC) of 20%–80%, avoiding deep discharge; for long-term inactivity, charge to 50%–60%, and recharge monthly; do not disassemble, squeeze, or short-circuit the battery.

Operating Procedures: Start and stop according to the instruction manual, turning on the battery before the load; do not disassemble the machine yourself in case of malfunction, contact the service provider for assistance; retain the certificate of conformity, warranty card, and commissioning records.

Efficiency and Lifespan: Use Class 1 energy efficiency appliances; keep the photovoltaic panels clean and unobstructed; use electricity during off-peak hours to extend system lifespan.