My Solar Panel Has Voltage But No Amps

Mar 7 2013 1.

My solar panel has voltage but no amps.

Calculate the current in amps by dividing power in watts by the voltage in volts. Hopefully it is less than the solar panel controller output voltage. Volts but no amps from a small solar panel reply to thread. Solar panel produces volts but no amps.

Open circuit voltage can vary depending on your solar panel but the readings we are usually looking for are in the range of 15 to 23v. It sounds like you have wired the new panels backwards to the rest of the array. Discussion in general electronics discussion started by jim n mar 7 2013. Since power watts is volts x amps only 12 18 66 7 of the potential power is harvested.

Scroll to continue with content. Some exceptions may apply based on panel type. It may be that you can never get more than 12 13v. Simply touch the solar panel leads with the multi meter probes matching their corresponding polarity red to red black to black.

If this doesn t work try doing this again but only this time first reconnect the panel then the battery. Measure the battery voltage. All of the panel s amps are available but only 12 of the panel s 18 volts. Solar panels wired backwards to vs to parallel connections act like a dead short solar panels are just a bunch of giant diodes connect them in the wrong polarity the panels will simply be a large set of diodes connected backwards and take current from the rest of the array.

It s also possible that one solar panel in your pv array failed. It was all going so well. Try disconnecting both the panel from the regulator and the regulator from the battery then reconnect them battery to regulator first then panel to regulator. If it is proceed.

For example if the solar panel is rated at 175 watts and the maximum power voltage vmp is given as 23 6 volts. Zero power output no power low voltage issue. Zero output is a common problem and in nine out of ten cases it is due to a faulty inverter or charge controller. Connect the ve solar controller output lead to the ve battery terminal.