Different Voltages Of Solar Panels

When you connect a 15v panel to a 24 v panel the overall voltage will be dragged down to 15 volts.

Different voltages of solar panels.

However many of the panels are only operating at half their open circuit voltage ie some panels give 16v or so and others only 8v. If you connect 2 solar panels of different voltage in series or in parallel 1st let consider 2 in series. It has anode and cathode the one marked with single line. For maximum voltages under 30 v it s actually not hard to make your own buck converter.

Then you get the sum of the two. If the two panels have similar current ratings but different voltage rating you can put them in series to get the sum of the voltages at the single current rating. But first you need to connect rectifier diode on each output. That is the positive of one to the negative of the other.

If we have two solar panels with the same voltage but different wattage there is no problem. They might be for example one monocrystalline and one polycrystalline solar panel. Such a reduction in voltage will lead to a reduction in power output and therefore loss in system performance. The picture above depicts the connection of two different 12v solar panels.

Rectifier diode will connect in forward bias. Similarly only solar panels of exact or similar voltage should be wired together in parallel. Lets say the load is a 24v water pump. 100w 18vmp x 5 5a imp and 50w 18vmp x 2 77 imp designated for a solar power system of a 12v system voltage.

There are 16 kyocera solar panels of 120w connected in 4 paralell series for a 48v system. It is possible to connect 2 solar panels of different voltage output in parallel. Even though the voltage from the solar module could be at 17vdc and the charge controller would be charging at 14v while the inverter was running happily at 13vdc input the whole system was made up of 12v nominal components so that it would all work together. Then use a switching power supply to buck the higher voltage down to what you want.

This will prevent reverse voltage damage so that the higher voltage panel will not destroy the lower voltage panel. So a 12v and 24 volt panel hooked in series will produce about 36v when connected to a load. They can be wired in parallel. If you want to connect diode on positive of your panel choose the anode of your diode.

On the other hand if our two solar panels have both different wattage and different voltage then parallel connection is not possible since the panel with the lowest voltage would behave like a load and would begin to absorb current instead of producing it with the.