Voltage of solar panels

[ShelbyWatson]

I have the 24v mppt hooked up to 24v batteries. I guess I was a little braindead when I got my solar panels. When I look at them, they are not 24v but 12v. I have 6 of them them hooked up in series so total v out is 72. How does this affect the total wattage in? Is it really only half what I expected? or am I just getting half the amps I thought I was getting? Can I connect 24v panels with these to get the wattage I am needing to get?

 

[HRTKD]

Post a picture of the label on the back, or a link to the panels. The voltage may not be what you think.

 

[Forbisher]

I have 6 of them them hooked up in series so total v out is 72. How does this affect the total wattage in?

You have 6 100 watt panels that have a Voc of about 22Voc so total v out is 132Voc for 6 in series not 72V

Your so called 12V panels also have a Vmp of about 18V so 108Vmp total on 6.

Did you look at the back label specs on your panels before you installed them?

When you say 24V MPPT do you mean an MPP all in one device?

 

[ShelbyWatson]

Post a picture of the label on the back, or a link to the panels. The voltage may not be what you think.

Here are the specs

• Maximum Power: 100W
• Maximum System Voltage: 1000V DC (UL)
• Optimum Operating Voltage (Vmp): 18.5V
• Open-Circuit Voltage (Voc): 22.6V
• Optimum Operating Current (Imp): 5.41A
• Short-Circuit Current (Isc): 5.86A
• Weight: 17.5 lbs
• Dimensions: 39.6 x 26.4x 1.4 inches

 

[ShelbyWatson]

You have 6 100 watt panels that have a Voc of about 22Voc so total v out is 132Voc for 6 in series not 72V

Your so called 12V panels also have a Vmp of about 18V so 108Vmp total on 6.

Did you look at the back label specs on your panels before you installed them?

When you say 24V MPPT do you mean an MPP all in one device?

Yes an mppt all in one system.
specs on panels

• Maximum Power: 100W
• Maximum System Voltage: 1000V DC (UL)
• Optimum Operating Voltage (Vmp): 18.5V
• Open-Circuit Voltage (Voc): 22.6V
• Optimum Operating Current (Imp): 5.41A
• Short-Circuit Current (Isc): 5.86A
• Weight: 17.5 lbs
• Dimensions: 39.6 x 26.4x 1.4 inches

 

[HRTKD]

As long as your all-in-one (MPP is the manufacturer, not MPPT. MPPT is a type of solar charge controller) can handle 132 volts input, you should be fine. Forbisher has the calculations right - or at least close enough that I see no need to calculate them again.