Solar Panel SPecs:
GCL SOLAR brand
Maximum Power 335W
Maximum Power Voltage 38V
Maximum Power Current 8.82A
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.
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 .
So if I use these solar panels and parallel them, I can charge a 24V solar system, right?
With solar power systems, the details matter:
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.
I will close this thread.
Here is a second thread with a lot more detail: