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DO I ALWAYS NEED A Solar CHARGE CONTROLLER?

Edit:Wenzhou Xihe Electric Co.,Ltd   Date:Mar 22, 2017

Not always, but usually. Generally, there is no need for a charge controller with the small maintenance, or trickle charge panels, such as the 1 to 5 watt panels. A rough rule is that if the panel puts out about 2 watts or less for each 50 battery amp-hours, then you don't need one.

For example, a standard flooded golf car battery is around 210 amp-hours. So to keep up a series pair of them (12 volts) just for maintenance or storage, you would want a panel that is around 4.2 watts. The popular 5 watt panels are close enough, and will not need a controller. If you are maintaining AGM deep cycle batteries, such as the Concorde Sun Xtender then you can use a smaller 2 to 2 watt panel.

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Wenzhou Xihe Electric Co.,ltd ( The former: Beijing FANGPU SUNNYCO.LTD) is specialized in development, product, sales and services of Solar Controller, inverter system, etc in a body of professional company.