Review the complete solar lighting system
Use your initial lamp, panel and battery estimate when discussing the configuration with Tonghua Lighting.
Estimate LED power, solar panel size and battery capacity for a road section. Adjust local sun hours and backup nights to see how the system requirements change.
Adjust the parameters below. Results update in real time. No sign-up required.
Enter your road and location details.
Residential streets need 10 lux average illuminance.
Use your initial lamp, panel and battery estimate when discussing the configuration with Tonghua Lighting.
The tool first estimates light output for the road area assigned to one pole, then converts that output to electrical load. Daily energy drives the panel and battery estimates. Check seasonal solar conditions, not just an annual sunshine average.
For a separate 60 W load running 10 hours/night, daily energy is 600 Wh. At 4.5 peak sun hours and 0.75 charging efficiency, the panel estimate is 178 W. Three backup nights require about 2,648 Wh using the stated battery factors.
Use local, seasonal solar-resource data. PVWatts estimates PV output; it does not validate this tool’s off-grid battery sizing.
Background on fixture efficacy, light quality and lifetime. The planning assumptions shown here are specific to this tool.
Products are matched based on your wattage and battery requirements. Contact us for factory-direct pricing.
Enter your parameters to get recommendations
Solar lighting needs an energy balance as well as a lighting layout. Check road width, pole spacing, nightly operation, shading, and the local solar resource before comparing systems.
Wattage alone does not establish road-lighting performance. Start with the required illuminance, coverage area, and fixture efficacy, then check distribution and uniformity with a photometric file.
Size the panel against the daily energy demand and the solar resource in the design month. The battery also needs enough usable capacity for the chosen backup period, with allowances for losses, temperature, and ageing.
All-in-one solar street lights integrate the solar panel, battery, and LED lamp into a single unit for easy installation. They are ideal for residential streets and pathways up to 150W. Split-type solar lights separate the solar panel from the lamp head, allowing for larger panel sizes and higher wattage outputs. They are recommended for main roads, highways, and industrial applications where higher illumination is required.
Learn more about LED heat safety and thermal management. For more detailed guidance, check our Solar Street Light Buying Guide which covers B2B sourcing, specifications, and total cost of ownership analysis.
Our installation guide covers pole height, spacing, panel tilt angle, foundation depth, and commissioning.
Multiply coverage area by target lux, then divide by utilization and maintenance factors to estimate fixture lumens. Divide by efficacy to estimate watts. For example, 240 m² at 10 lux with factors of 0.6 and 0.8 needs 5,000 lumens, or about 28W at 180 lm/W.
The solar panel power needed equals the daily energy consumption (wattage × operating hours) divided by the daily sunshine hours multiplied by a charging efficiency factor of 0.75. For example, a 60W light running 10 hours needs 600Wh per day. With 4.5 sunshine hours, you need approximately 178W of solar panel capacity (600 ÷ (4.5 × 0.75) = 178W). Our calculator handles this automatically.
This tool uses battery Wh = daily Wh × backup nights ÷ (0.85 × 0.8). A 600 Wh daily load with three backup nights gives about 2,647 Wh before rounding. The factors are planning assumptions; check usable capacity, temperature limits, ageing and the battery manufacturer’s permitted discharge.
All-in-one solar street lights integrate the solar panel, battery, LED lamp, and controller into a single compact unit, making installation simple and cost-effective for residential streets, courtyards, and urban side streets (LKL and LKAS series). Split solar street lights separate the solar panel from the lamp head, allowing larger panel and battery configurations for main roads and highways where higher power output is needed (LKH, LFT, and LKA series). Split systems are also easier to maintain as individual components can be replaced independently.
Compare the battery’s rated cycle life, usable capacity, temperature limits, and warranty. LiFePO4 is common in solar lighting, but its service life depends on how the system is sized and operated.
Send the location, road dimensions, pole spacing, and nightly operating schedule. Ask for panel, battery, and fixture specifications for those conditions.