Firstly lets take a look at connecting solar panels in series.
How to wire 2 solar panels together.
When you intend to wire two panels produced by different vendors the vendors are not the problem.
When solar panels are wired in series the voltage of the panels adds together but the amperage remains the same.
By connecting multiple solar panels in series we increase the system voltage.
Wiring solar panels in a parallel circuit.
Solar panels are usually connected in series to obtain higher output voltage.
The following wiring diagram shows that the two 12v 10a 120w solar panels connected in parallel will charge the two 12v 100ah parallel connected batteries as well as power up the ac load through batteries and inverter during the day in normal sunshine.
If we have two solar panels with same voltage and power the connection will be very simple.
So if you connect two solar panels with a rated voltage of 40 volts and a rated amperage of 5 amps in series the voltage of the series would be 80 volts while the amperage would remain at 5 amps.
The problem is in different electrical characteristics of the panels together with different performance degradation.
Connect all the positive terminals of all the solar panels together and all the negative terminals of all the panels together.
Both have their own purpose and applications and both have different outcomes when hooking up solar panels of different wattage together.
During shading night when there is no generating power from solar panels the battery stored energy will be used as a backup power and it.
There are two ways to wire up solar panels.
If you had 4 solar panels in parallel and each was rated at 12 volts and 5 amps the entire array would be 12 volts at 20 amps.
We put solar panels together to increase the solar generated power.
In a solar power system the higher the voltage and the lower the energy losses along the cables to know the maximum system voltage we usually just need to turn the panel and read the label where the value is reported.