Hi all
I have a motor which runs on Battery power. The motor is 350 W and I have 3 batteries of 12 V, 12 AH. What would be the solar panel size required for charging this battery pack.
Can I get solar cells in Bangalore to build my own panel ?
Thanks
Salil
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{ 1 comment… read it below or add one }
About 450 watt-hours – that sounds like an electric bike battery. Is it 36 volts?
What you need is to find a 200-watt panel with a max power voltage of 42 volts or more, or two, 100-watt panels in series. 100-watt panels are not the mainstream, anymore, so you may have to go with 165-watt.
You would also need a charge controller for the battery pack. I’ve seen some electric bikes here with a switching power supply for their charger. For those, I believe you could wire the charger directly to high voltage DC, and it would work. But you would need to supply the mains voltage times 1.4 to the charger. That means 150 volts at least in my area, which implies 6 panels. Expensive, unless you already have such an array for other purposes.
Sorry, I don’t have a source for individual cells. They are sold on craigslist where I live. But my personal opinion is that building your own panel is a poor value – it costs almost as much, and won’t last very long.