4 FAQs about How to choose a photovoltaic panel charger

What size solar charger do I Need?

Knowing the size of the “solar charger needed” largely depends on your battery size and desired charging speed. Assuming optimal sunlight conditions (around 5 hours of peak sunlight), a 100W solar panel can generate around 500Wh per day. Therefore, to recharge a 12V 100Ah battery (around 1200Wh capacity), you'd need at least a 240W solar panel.

Do solar panels need a charge controller?

If a panel puts out 2 watts or less for each 50 battery amp-hours, you probably don't need a charge controller. Anything beyond that, and you do. Solar charge controllers play an integral role in solar power systems, making them safe and effective. You can't simply connect your solar panels to a battery directly and expect it to work.

How do I charge a solar panel?

To do this, we recommend using a solar charge controller, Y-connector with a battery inline on one leg, and the female cigarette socket on the other leg. Nearly all solar panels are designed for outdoor installation, as this is where they will receive the best, most direct exposure to sunlight.

How do I choose a solar charge controller?

Something to be aware of when selecting a controller is that they are typically rated in amps, while photovoltaic panels are typically rated in watts. That means a solar charge controller such as the Morning Star SS6L, 6-amp controller will work with nearly every panel we sell, right up to about 70 watts.

View/Download How to choose a photovoltaic panel charger [PDF]

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