is a 38V solar panel considered 36V panel?

hmong2017

Solar Panel SPecs:

GCL SOLAR brand

Maximum Power 335W

Maximum Power Voltage 38V

Maximum Power Current 8.82A

Model GCL-P6/72335

Photowhit

No, it would be designed for charging a 24 volt battery banks.

Charging a 24 volt battery bank with an inexpensive PWM charge controller, this will reach high enough voltages to properly charge a 24 volt battery bank, which might reach 32 volts or some flooded types when equalizing.

Solfyr

Depends on Temperature ...

At low temperatures at freezing point , it might output more than 38 Volts .

The Temperature Coefficient for the Voltage needs to be calculated from

percent % to Volts .

If that panel has a Tempcoeff of 0.3% , then the Voltage falls on lower temperatures than those 25°C by

0.11 V each Celsius . At 0°C it could probaby supply 38 + ( 0.11*25 ) == 38 + 2.75 ≈ 41 Volts .

And don't confuse Ump with Uoc , because Ump is important for feeding the battery ,

while Uoc is important for the Charge Controller Udc max .

Otherwise , Photowhit is right .

hmong2017

https://forum.solar-electric.com/discussion/comment/397395#Comment_397395

So if I use these solar panels and parallel them, I can charge a 24V solar system, right?

BB.

hmong,

With solar power systems, the details matter:

https://www.solaris-shop.com/gcl-gcl-p6-72-330-330w-poly-solar-panel/

Maximum Power (Pmax):330 Watts

Maximum Power Voltage (Vm):37.80 Volts

Maximum Power Current (Im):8.73 Amps

Open Circuit Voltage (Voc):46.20 Volts

Short Circuit Current (Isc):9.33 Amps

It also depends on the type of solar charge controller you pick (PWM is the less expensive type and MPPT is the more expensive/more capable type). where are located (Chico California?), size of battery system, size of solar array, etc...

A "24 volt" solar panel for a PWM charge controller charging a 24 volt lead acid battery bank... Yes, your Vmp~35-40 VDC is the "standard" 24 volt panel running a PWM charge controller (or 2x 24 volt panels in series to charge a 48 VDC battery bank on a PWM controller).

I would highly suggest that we backup a moment and we better understand your energy needs (how much power, where located, emergency backup, camping, etc.), what hardware you would like to use, etc.

I don't want to give you the "right answer" to a relatively complex set of questions that can cause you more grief down the road.

-Bill

BB.

I will close this thread.

Here is a second thread with a lot more detail:

https://forum.solar-electric.com/discussion/354500/help-suggest-and-fix-my-friends-new-diy-solar-system#latest

-Bill