solar powered system for 36 V 10 aH battery?

Question

I am running a 180 watt electric motor (e-bike conversion kit) via a 36 V 10 amp hour lithium ion battery. Can anyone give me advice on setting up a solor powered system to most effectively charge the battery?

Answer 1

Yes you can charge a 36 volt battery with solar.

You just need 1 amp at 48 volts to charge a 10amp 36 volt battery.

Hook three of these solar panels to add volts to 49.2 volts http://store.oynot.com/suswsopa6.html

Wire them to this charge controller because it is about the only one I know of that will do 36 volt systems. http://store.oynot.com/mpptmx60.html

Should charge the battery in about two hours time.

You only need 1 amp to charge the battery but that would cost you more because the smaller the solar panels are the more they cost. You could use one 48 volt solar panel if you could find a low wattage panel. But normally the big panels are built for the wattage and would be way too high for your needs.

Here is a page that will give you an idea of how to hook it all up. http://www.oynot.com/off-grid-solar.html

Answer 2

You might want to check out the Microchip website. They have some incredibly efficient Li-ion battery charger chips and circuits.

A lot of it is going to depend on how -fast- you want to re-charge the battery and on how much solar panel (in terms of available watts) you have to work with.

Doug

Answer 3

Solar Power as the Reflectors store the Sunlight in Batteries for later use

Answer 4

You could put 12V. solar panels in series
for 36V., but with a Li ion battery, a charge
controller would be required.