Texas Hunting Forum

Solar Panel Voltage Output???

Posted By: Klinker

Solar Panel Voltage Output??? - 02/16/21 10:08 PM

How many volts should a solar panel be putting out?
Posted By: Ol Thumper

Re: Solar Panel Voltage Output??? - 02/16/21 10:56 PM

What kind of panel? Running a solar charger?
Posted By: Klinker

Re: Solar Panel Voltage Output??? - 02/16/21 11:24 PM

A 12V panel for a deer feeder.
Posted By: Ol Thumper

Re: Solar Panel Voltage Output??? - 02/16/21 11:35 PM

Full sunlight 13.5-14.5 volts
Posted By: Klinker

Re: Solar Panel Voltage Output??? - 02/17/21 12:20 AM

In that case, 21V means it is working really well!
Posted By: David Maas

Re: Solar Panel Voltage Output??? - 02/17/21 06:33 AM

No, it means that you have an unregulated panel and should be running a controller with it
Posted By: Vern1

Re: Solar Panel Voltage Output??? - 02/17/21 01:12 PM

Originally Posted by David Maas
No, it means that you have an unregulated panel and should be running a controller with it


Panels are unregulated but output is temperature sensitive.
If 12v is the nominal rating, 21v out of a 12v panel is fairly normal in a cold clear sunny day like we have been having last week.
In the summer when the sun hits the panels, they will start to drop off as they heat up.

This label is from a 24v 245 watt panel.
It is a 60 cell 24VDC nominal panel that makes max power output at 30.2V but will run up to 37.5 volts if unloaded.
[Linked Image]
Posted By: Klinker

Re: Solar Panel Voltage Output??? - 02/19/21 01:02 AM

FYI - the answer is 20-22V, in full sun, for the typical 6x6/8x8 solar panel used on most deer feeders.

That is with an unregulated, no controller panel . . . just like the ones found on 99.999% of all feeders.
Posted By: Pittstate

Re: Solar Panel Voltage Output??? - 02/28/21 03:44 PM

yep, mine put out 19 to 21 volts with no load on cool days. normal
Posted By: Hogflyer

Re: Solar Panel Voltage Output??? - 03/16/21 07:32 PM

Depends some panels! some of these chi-com junks make over 14.5 volts I would not use them! got panel in full sun NO load, 14.2 and up some, under load
13.3 to 13.8 pending how good is your battery source. Over time panels drop voltage, monitor it at times.

Solar panels should be getting cheaper with more companies venturing out and getting govt subsidies for investment money!



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