600W Solar - Getting 420W Max
I have 5 120W Solar panels flat mounted. I am in Mission TX at a FHU park for the winter. It is giving me a good place to test my system out. Back in the NE there are to many trees. I have seen a max ...
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That just goes to show your pwm is quite a bit worse.
Let's look at some real life numbers. We'll compare a 60-cell 24V battery pwm system to a 36-cell 12V battery pwm system.
Sharp 224W, 60-cell: Isc = 8.33A
Kyrocera 140W, 36-cell: Isc = 8.68A
To make things equal, we'll scale the 224W panel down to 140W to get an equivalent Isc.
Isc_60cell = 8.33A * (140W / 224W) = 5.20 A
Now we can calculate how many watts each system outputs.
12V system: P = 13V * 8.68A = 112.84W
24V system: P = 26V * 5.20A = 135.2W
The 24V system outputs 1 - 135.2/112.8 = 20% more power. That's the same 20% advantage I calculated in my previous post.
Let's look at some real life numbers. We'll compare a 60-cell 24V battery pwm system to a 36-cell 12V battery pwm system.
Sharp 224W, 60-cell: Isc = 8.33A
Kyrocera 140W, 36-cell: Isc = 8.68A
To make things equal, we'll scale the 224W panel down to 140W to get an equivalent Isc.
Isc_60cell = 8.33A * (140W / 224W) = 5.20 A
Now we can calculate how many watts each system outputs.
12V system: P = 13V * 8.68A = 112.84W
24V system: P = 26V * 5.20A = 135.2W
The 24V system outputs 1 - 135.2/112.8 = 20% more power. That's the same 20% advantage I calculated in my previous post.
BFL13 wrote:
The 60 cell "amps advantage" didn't happen in real life though.
