What happens if I connect panels in series with a battery?

Say I have a solar panel thats only 9V and 4A closed current. If i connect them to a battery thats 12V (with same signs together) to try to charge it, would the current go in reverse (battery charges panels instead)? What if I connect 2 panels in series to make 18V. Would that make the current go in the right direction? Never mind all the safety issues, I just want to know theoretically. Thanks in advance!What happens if I connect panels in series with a battery?
It won't go in reverse because solar panels contain diodes to prevent it.


18 volts should charge it, but it may damage the battery by trying to ram too much current through it and overheat it. A regulator is normally required.


And technically, connecting a battery that way is not in series, which would add the voltages, but in parallel. The regulator would be in series with the panel.What happens if I connect panels in series with a battery?
The panel acts like a battery, although one that has a large internal resistance. So you can put several panels in series, or in series with batteries, as long as you connect them + to 鈥? just as you connect batteries in series.





鈥?1 + 鈥?2 + 鈥?3 +





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most PV photovoltaic panels need a controller


when it gets dark, the battery voltage will discharge into the panel and may cause some damage depending on the sizes





18V would be a bit high, although a series regulator would do the job of preventing overcharging of the battery and provide low voltage disconnect, reverse bias...








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