thebeavesknees
New Member
Hi, all!
I got some fairly strange numbers today that I would like to have some feedback on. Is it possible to get ~725W input from two REC 405W rated panels (two in series currently for 810W nominal) in February in Pennsylvania? That works out to be 88% of the rated capacity, and I find the entirely suspect. Just the day before under similar weather conditions, I saw a consistent peak of about 520W, or ~62% of the nominal rating of the panels. These are nearly flat mounted on the roof of my travel trailer, and not pointed in the best orientation, and even have a partial occlusion due to a roof peak near noon.
![3048LV-MK_05.png 3048LV-MK_05.png](https://diysolarforum.com/data/attachments/197/197465-b2fc51ff4eedae8031efb26701d1873b.jpg)
The 520W seems at least possible and matches well with the JK BMS and shunt readings at the time. I don't have logging via the shunt yet, and I was at work while these very high peaks happened, so I don't have any corroboration from other sources that this is actually what was happening.
Here are the crappy screen shots of crappy WatchPower for most of the day:
![3048LV-MK_06.png 3048LV-MK_06.png](https://diysolarforum.com/data/attachments/197/197468-03870d3c51eb8a53dc6ddfc938432330.jpg)
![3048LV-MK_07.png 3048LV-MK_07.png](https://diysolarforum.com/data/attachments/197/197469-e7cb932b2d441e885492dcf7caa71630.jpg)
![3048LV-MK_08.png 3048LV-MK_08.png](https://diysolarforum.com/data/attachments/197/197470-94402759fe38952a09dc229986868c94.jpg)
SO is that plausible or is it just junk data from watchpower or the 3048 itself?
I got some fairly strange numbers today that I would like to have some feedback on. Is it possible to get ~725W input from two REC 405W rated panels (two in series currently for 810W nominal) in February in Pennsylvania? That works out to be 88% of the rated capacity, and I find the entirely suspect. Just the day before under similar weather conditions, I saw a consistent peak of about 520W, or ~62% of the nominal rating of the panels. These are nearly flat mounted on the roof of my travel trailer, and not pointed in the best orientation, and even have a partial occlusion due to a roof peak near noon.
![3048LV-MK_05.png 3048LV-MK_05.png](https://diysolarforum.com/data/attachments/197/197465-b2fc51ff4eedae8031efb26701d1873b.jpg)
The 520W seems at least possible and matches well with the JK BMS and shunt readings at the time. I don't have logging via the shunt yet, and I was at work while these very high peaks happened, so I don't have any corroboration from other sources that this is actually what was happening.
Here are the crappy screen shots of crappy WatchPower for most of the day:
![3048LV-MK_06.png 3048LV-MK_06.png](https://diysolarforum.com/data/attachments/197/197468-03870d3c51eb8a53dc6ddfc938432330.jpg)
![3048LV-MK_07.png 3048LV-MK_07.png](https://diysolarforum.com/data/attachments/197/197469-e7cb932b2d441e885492dcf7caa71630.jpg)
![3048LV-MK_08.png 3048LV-MK_08.png](https://diysolarforum.com/data/attachments/197/197470-94402759fe38952a09dc229986868c94.jpg)
SO is that plausible or is it just junk data from watchpower or the 3048 itself?
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