Putting different solar panells in series

Product Discussion BLUETTI AC Series
1

I have a Justnow 200 watt panel, I would like to buy another just like it and put them in series on my AC-180. The Justnow operates at 20 volts. Unfortunatly, they are no longer for sale. What would happen if I put a 18 or 19 volt 200 watt panel in series with it? I would still be under 40 volts which my AC-180 should be able to handle. What would happen to the efficency?

Terry H.

2

In your case 38 or 39 V. When connected in series, the voltage adds up.
The amperage corresponds to the amperage of the panel with the lowest amperage. As a result, the efficiency is slightly lower than if you use two identical panels.