I think you have the volts wrong. The voltages are usually 18 Volts or 36 Volts. You probably are comparing the power ratings of 80 watts and 100 watts. Note that 80 watts are usually 100 watt panels but advertised as 80 watts because the standard practice with electric circuits is to derate components to 80%. Anyways, with electricity, the same voltages can be wired in parallel, the same currents can be wired in series, as you don't know this and likely got your specs wrong, you should find someone who knows what they're doing before you short circuit something or someone.
I'm sure you're talking about Watts, not Volts. You can certainly combine an 80 Watt and 100 Watt panel. Connect them in parallel at your charge controller (make sure you use a charge controller). Make sure both panels are 12v (about 20v open circuit).
The important thing is to make sure they produce the same VOLTAGE. If one of them produces a lower voltage, then some of the current will drain backwards through it. You should get an mppt charge controller that will down convert on any solar electric system.
Funny, I have never found panels with those voltages.
Are you sure you don't mean watts?
With voltages, they can be wired in series to raise the voltage, but EACH must be able to handle the total current.
With current, they can be wired in parallel to raise the current, IF the voltages are the same.
Watts is voltage X current.
Sounds confusing, I am not able to give you a definitive answer ,I suggest that you find an electrician
You can use to join to each other....
I have 2 different solar panel on my motor home can`t they work together one is 80 volt the other 100 volt and dif. company
