best low light performance
Hi, Amorphous panels are clearly the best for low light performance--but are relatively speaking huge. Does any one know if Poly or Mono are better in low light?
Forum Discussion
LOL, I read your question and get dizzy and nearly fell out of my chair!
Why make the question so GD hard? All specs in metric!
Say we got 3 panels each 1 m squared. Let's look at the irradiance at 1000W/m^2 and 200W/m^2.
Efficiency spec (from Unisolar graph (not necessarily correct)) @ 1000 & 200 W/m^2:
Unisolar: 6%, 8%
Siemens: 13.2%, 12%
Kyrocera: 12%, 11.2%
Power output at 1000W/m^2
Unisolar: P = 1000W * 6% = 60W
Siemens: P = 1000W * 13.2% = 132W
Kyrocera: P = 1000W * 12% = 120W
Power output at 200W/m^2
Unisolar: P = 200W * 8% = 16W
Siemens: P = 200W * 12% = 24W
Kyrocera: P = 200W * 11.2% = 22.4W
Changing the question around, given 3 100W panels, how much power at low irradiance does each output?
We got to calculate the panel area first:
Unisolar: A = 100/60 = 1.66 m^2
Siemens: A = 100/132 = 0.757 m^2
Kyrocera: A = 100/120 = 0.83 m^2
Power produced at 200W/m^2:
Unisolar: P = 200W/m^2 * 1.66m^2 * 8% = 26.5W
Siemens: P = 200W/m^2 * 0.757m^2 * 12% = 18.2W
Kyrocera: P = 200W/m^2 * 0.83m^2 * 11.2% = 18.6W
In this case, the Unisolar will produce about 8 more watts from a 100W panel. That's a 8% improvement (not 6% as previously stated).
Sal
Why make the question so GD hard? All specs in metric!
Say we got 3 panels each 1 m squared. Let's look at the irradiance at 1000W/m^2 and 200W/m^2.
Efficiency spec (from Unisolar graph (not necessarily correct)) @ 1000 & 200 W/m^2:
Unisolar: 6%, 8%
Siemens: 13.2%, 12%
Kyrocera: 12%, 11.2%
Power output at 1000W/m^2
Unisolar: P = 1000W * 6% = 60W
Siemens: P = 1000W * 13.2% = 132W
Kyrocera: P = 1000W * 12% = 120W
Power output at 200W/m^2
Unisolar: P = 200W * 8% = 16W
Siemens: P = 200W * 12% = 24W
Kyrocera: P = 200W * 11.2% = 22.4W
Changing the question around, given 3 100W panels, how much power at low irradiance does each output?
We got to calculate the panel area first:
Unisolar: A = 100/60 = 1.66 m^2
Siemens: A = 100/132 = 0.757 m^2
Kyrocera: A = 100/120 = 0.83 m^2
Power produced at 200W/m^2:
Unisolar: P = 200W/m^2 * 1.66m^2 * 8% = 26.5W
Siemens: P = 200W/m^2 * 0.757m^2 * 12% = 18.2W
Kyrocera: P = 200W/m^2 * 0.83m^2 * 11.2% = 18.6W
In this case, the Unisolar will produce about 8 more watts from a 100W panel. That's a 8% improvement (not 6% as previously stated).
Sal
MEXICOWANDERER wrote:
I read this thread until I got dizzy and fell out of my chair.
