PV Gap

Richard Said:

How to connect 2 power supplies together? (solar panels)?

We Answered:

Each individual solar cell puts out .5 volts. You have to wire them in series(+ to - to + to - to + ). To get 4 volt you will need at least 8, 10 would be better, because they put out .5 volts max. with direct sunlight. The top side(shiny side) is the negative side, the back side is the positive side.
Before you hook them together, check each one by itself to make sure its good.

Raymond Said:

How to connect 2 power supplies together? (Solar panels)?

We Answered:

Most solar lamps use a single 1.2V nicd or nimh battery as a back-up supply, so they should be able to generate at least 1.5V in full sun to allow charging of the battery (you can verify the voltage of a single panel with your DMM) If you have two of these panels, I wouldn't expect them to make more than approximately 3V. The proper connection would be a series connection where the negative of one panel connects to the positive of the other and the remaining positive and negative wires become the outputs. Try this connection and measure again with your multimeter set to DCV and the panels in full sun. If the voltage is not high enough, add a third panel wired with its positive lead to the remaining negative of the first two. This should bring your voltage up another 50 percent.When you wire the panels positive to positive, negative to negative as you already have, voltage will be that of one panel, but current output will double (more amps) If you have many of these panels, you could combine series and parallel wiring to increase voltage and current.