Solar street light power assembly

Part 5 of the Solar Lighting Design Guide is about determining power components. Now, by determining the lumen requirements of the project and the required operational overview, you already know the coverage you need, and it is time to determine what kind of solar modules are needed. This is determined by a simple calculation after collecting some additional information.

Solar module size

Step 1-Take the wattage of the fixture and divide by 12 to determine the amplifier required to operate the fixture for 1 hour. Divide by 12, because solar systems are usually 12 VDC; however, some are 24 VDC, but this formula will still be calculated correctly in the end.

Step 2-Multiply the fixture amps by the number of operating hours per night to provide you with the total power consumption required per night If you need to go from dusk to dawn, know how the time of the longest night of the year is determined. There are approximately 13.25 hours of nights in Florida in winter and 14.5 hours in New York. The split time or x hours after dusk can also be used to determine. When processing motions, the average number of hours of operation is calculated.

Step 3-Multiply the total amperage required for the total number of fixtures that need to be powered by a single solar module. If there is only one fixture on the power system, then you can skip this step. However, there are also applications such as signage, lamp posts or landscape lighting, where multiple fixtures are used on a single device. Solar modules.

Step 4-Add 20%. The reason for this is to ensure that the system will operate as promised in the next few years. With the advent of the solar age, the generation of electrical energy will slowly degrade. After about 25 years, the power has dropped by about 20% compared to the original production performance.

Step 5-Divide by the available solar hours in winter in your area. This can be found online and by viewing the local NSOL guide. Remember to consider winter availability, not the annual average, because the system will not run the same equipment at different times of the year unless in the worst case.

Step 6-Determine how much powertrain is needed. Each power component provides a different amplifier current and what the system needs to provide is needed. For example, our SEPA 100 provides 5.46 +/- amps per hour, up to 11 amps in New York, and 24 amps in Florida, and only one day in winter.

Battery assembly size

Step 7-Determine the battery assembly size by multiplying the amperage required per night by the number of backup days required. In most applications, the minimum autonomy we provide is 5; however, the more north, the more this situation occurs due to changes in the battery's depth of discharge in cold weather.

Understanding all these factors can affect or destroy a system, and why not use "off-the-shelf" systems when a reliable system design is needed. Each system should be designed for specific project requirements, and understanding all of the above steps will allow a reliable system design that will operate for more than 25 years.

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