Under full sunlight (5 peak hours), a 410W panel can produce around 2.0 kWh/day. In moderate conditions, it generates 1.5 – 1.8 kWh/day. In poor or winter weather, output may range between 0.5 – 1.0 kWh/day.

The Longi LR5-54HBD-410M panel comes with a 12-year product warranty and a 25-year linear performance warranty.

Solar panels convert sunlight into electricity using photovoltaic cells. These cells generate direct current (DC) electricity, which is then converted to alternating current (AC) by an inverter.

420W is the "STC" rating — based on ideal lab conditions (25°C, 1000W/m² sunlight, clean panel, etc.). In the real world, you’ll usually see 80–95% of that on a sunny day — so 340 to 390W is a good target for peak production.

Several real-world conditions can reduce the actual output of a 410W solar panel:

• Inverter efficiency (~95–98%)
• Temperature losses (hot panels produce less)
• Dirt, shade, or snow accumulation
• Wiring resistance and voltage drop
• Suboptimal panel orientation or tilt angle

Each panel measures 172.2 x 113.4 x 3 cm (67.8 x 44.6 x 1.18 in).

Here’s a breakdown of real-time wattage output for the Longi 410W panel in different weather conditions: