Hello,
I'm seeing some odd results while attempting to charge 3xAA NiCD batteries with a solar panel (4.5V, 90MA) (realistically 4.3V, 40mA)
The short circuit current is measured around 40mA. This is about the trickle charge rate I was hoping for. When I connect it to my batteries, the current going to the batteries is only like 8mA and it decreases with time.
I'm assuming as the batteries gain charge their voltage is increasing. So if my panel is 4.0V and my batteries are 3.6V, the small .4V differential will reduce the current.
Should I increase my solar panels to 8V 40mA to make sure I always have a good voltage differential between my panels and my batteries to ensure a healthy charge (40mA)?
Thanks!
Bill
I'm seeing some odd results while attempting to charge 3xAA NiCD batteries with a solar panel (4.5V, 90MA) (realistically 4.3V, 40mA)
The short circuit current is measured around 40mA. This is about the trickle charge rate I was hoping for. When I connect it to my batteries, the current going to the batteries is only like 8mA and it decreases with time.
I'm assuming as the batteries gain charge their voltage is increasing. So if my panel is 4.0V and my batteries are 3.6V, the small .4V differential will reduce the current.
Should I increase my solar panels to 8V 40mA to make sure I always have a good voltage differential between my panels and my batteries to ensure a healthy charge (40mA)?
Thanks!
Bill