Are they monocrystalline or polycrystalline?

Our standard output range is 450W to 720W with module efficiency of 21% to 23.5%. Our N-type TOPCon series can reach above 23%. We can match the exact power bin to your project.

We cover PERC, TOPCon, HJT and BC technologies, mainly 182mm and 210mm large-format single-glass and dual-glass modules ranging from 400W to 720W, suitable for residential roofs, C&I distributed projects and utility-scale ground plants.

You may request inspection within 15 days of delivery. Quality issues not caused by human factors are covered by free repair or replacement during the warranty period. Damage caused by improper installation, wiring errors, water ingress, lightning, or other human/force-majeure causes is not covered. Return shipping costs are borne by the responsible party.

Please check: 1. Whether the battery voltage is sufficient (low voltage causes output drop); 2. Whether total load power exceeds the inverter rating; 3. Whether surge power from inductive loads (AC, fridge) is within the inverter's tolerance (typically 2× rated power); 4. Whether AC connections are secure.

An insulation fault is usually caused by poor PV-to-ground insulation. Please check: 1. Whether PV panels and cables are damp or damaged; 2. Whether DC connectors are properly waterproofed; 3. Whether PV cables are touching the metal roof. The fault usually clears once the issue is resolved. If it persists, contact a professional for inspection.

Lithium (LiFePO4) batteries offer longer cycle life (3,000-6,000 cycles vs 500-1,500), higher efficiency, smaller size, and less maintenance. Although the upfront cost is higher, they are more economical long-term. Lead-acid batteries are cheaper but shorter-lived and require regular maintenance. Choose based on budget and expected service life.