PV Gap

Myrtle Said:

What is the maximum voltage a AA and AAA battery can safely hold?

We Answered:

The heat of your solar panels doesn't mean anything - other than the drop in efficiency from them being warmed by the sun.
If the panel is match to the voltage of the batteries, then you can't over charge them - the current just turns to a trickle which the battery voltage rises.
If it does not match, then you are going to destroy the batteries unless you have a proper regulator designed for the job.
The answer that talks about the voltage being cut off when they are charged is mixing the terminology of the second and third sentences above.

Kristin Said:

Help constructing a battery charger,?

We Answered:

Go to this link for a lot of ideas:
http://www.instructables.com/tag/?q=sola…