how to calculate solar street light system | Queneng Guide
How to Calculate Solar Street Light System Requirements - Queneng
1. Determining the Load
This is the first and most crucial step. You need to determine the total wattage required by your street lights. This involves:
* Number of lights: Count the number of streetlights needed for the area.
* Wattage per light: Check the specification plate of your chosen LED street light to determine its wattage consumption.
* Total wattage: Multiply the number of lights by the wattage per light. Example: 10 lights x 50W/light = 500W.
2. Calculating Energy Consumption
Next, determine the daily energy consumption:
* Operating hours: Determine the number of hours the lights will operate daily. This often depends on the location and local regulations (e.g., sunset to sunrise).
* Daily energy consumption (Wh): Multiply the total wattage by the operating hours. Example: 500W x 8 hours = 4000 Wh (4 kWh).
3. Sizing the Battery Bank
The battery bank must store enough energy to power the lights during periods of low or no sunlight. Consider:
* Battery capacity (Ah): This is crucial and depends on several factors including the daily energy consumption and the desired autonomy (number of days the system can operate without sunlight). Choose a battery system with sufficient capacity. Remember to account for battery efficiency (typically 80-90%).
* Battery voltage: Select the appropriate voltage (e.g., 12V, 24V, 48V) based on your chosen lights and charge controller.
4. Selecting Solar Panels
The solar panel array needs to generate enough energy to meet daily consumption and recharge the batteries.
* Panel wattage: Consider panel size, efficiency, and available sunlight. Consult solar panel datasheets for power output under specific conditions (STC).
* Number of panels: Divide the daily energy consumption by the individual panel wattage (considering sunlight hours and system losses) to determine the required number of panels.
5. Choosing a Charge Controller
The charge controller regulates the flow of electricity from the solar panels to the battery bank, preventing overcharging and damage.
* Controller amperage: Select a controller with an amperage rating that exceeds the maximum current output of the solar panels.
* Controller voltage: This should match the battery bank voltage.
6. Considering System Losses
Always factor in system losses (wiring, battery efficiency, temperature effects). A 10-20% loss is a reasonable estimate.
7. Professional Assistance
While this guide provides a basic understanding, consulting with a qualified solar lighting professional is always recommended for complex projects or to ensure optimal system design and compliance with local regulations. Queneng offers comprehensive solar street lighting solutions and expert guidance. Contact us today for your project.
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FAQ
Battery and Analysis
What are the possible reasons for the short discharge time of batteries and battery packs?
2) The discharge current is too large, which reduces the discharge efficiency and shortens the discharge time;
3) When the battery is discharging, the ambient temperature is too low and the discharge efficiency decreases;
Can batteries of different capacities be combined?
Schools and Educational Institutions
How long will it take to install solar lights on my campus?
Installation can typically be completed in a few days, depending on the size of the campus and the number of lights.
Tourist Attractions and Resorts
Do solar lights require much maintenance?
Solar lights require minimal maintenance. Routine checks and occasional cleaning of the solar panels are enough to keep the system functioning efficiently. There are no wires or bulbs that need to be replaced frequently.
Municipal and Public Infrastructure
Can they operate during rainy or cloudy days?
Yes, advanced battery technology ensures continuous operation even in low sunlight conditions.
Solar Street Light Luhui
Do Luhui solar street lights have a battery backup for cloudy days?
Yes, each Luhui solar street light includes a rechargeable battery that stores solar energy during the day to power the light at night, ensuring continuous operation even on c
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