Panel voltage is additive when panels are wired in series.
Mixing different voltage solar panels.
Voltage in parallel you should be able to achieve a fair amoint of efficiency.
Typically the mixing of solar modules from different manufacturers and of dissimilar voltages wattages and amperages is not recommended.
If the panels are the same voltage and they both contain a diode to prevent reverse current then yes you can.
Since you are wanting to combine panels of differing currents but the same rated max.
Though mixing different solar panels is not recommended it s not forbidden and things would be ok as long as each panel s electrical parameters voltage wattage amps are carefully considered.
The only way to wire in additional panels and guarantee that the voltage of all strings would remain equal is to add the exact same.
Mixing different solar panels in parallel maximum voltage on a string of modules must always be lower than maximum input dc voltage of the inverter.
Combining pv panels in series requires you to use panels with the same very close currents.
This diode does lose about 5 percent of the power 5 volt drop so more with a 6 volt system less in a 24 volt 5 6 about 15 percent 5 24 about 2 percent.
Mixing solar panels of various voltage or wattage or produced by different manufacturers is a frequently asked question by most diyers.
However if you take certain factors into careful consideration you can easily achieve this goal.