What wattage should I buy when buying a solar light

However, in 2019, the solar panel's price needs to be US$0.3 per watt, which is currently the lowest in history. And people can easily buy various residential solar lights on Amazon such as solar garden lights, solar flood lights, solar security lights, and solar wall lights.

For instance, the 12 voltage 30ah battery is a 4 times capacity of 3.2 voltage 30ah battery. Normally, small power solar flood led lights and the small power solar wall lights which are hot sales in Amazon and eBay are 3.2 voltage system batteries. But low voltage battery systems can not support big power led solar lights.

As we mentioned previously, a 3.2 voltage system can support led power no more than 20watt. So if you deal with serious solar street lights projects for government, the key specification is not led by power but also the luminous efficacy of the whole solar light fixtures.

Take the solar flood lights in Amazon shop, for example, they have labeled 100 wattage solar floodlights, 200 wattage solar flood lights, and 300 wattage solar floodlights. The so-called 300watt solar flood lights, real led power is 15 watt at the highest. Because you can easily find that the solar panel power of it is only 25watt to 30watt.

Take the 6000 lumens all in one solar street lights for example, if we use 150 lumens per watt led solution, we need to set 70 watts solar panel and 12V 30AH lithium battery. If we use 200 lumens per watt led solution instead, led power can be 30 watts only. Then we can low down the solar panel power to 50 watts and lithium battery to 12V 22ah.

Normally, small power solar flood led lights and the small power solar wall lights which are hot sales in Amazon and eBay are 3.2 voltage system batteries. But low voltage battery systems can not support big power led solar lights. Because smaller voltage, bigger currency needs to be set to reach the power wattage.