Wrong efficiency showed on datasheets

Product Discussion Solar Panel
1

The efficiency showed on Bluetti solar panels datasheets is wrong.

How efficiency of a solar panel is calculated?
The total irradiation we have is 1000W/m² (this is shown on datasheets).

For example, the PV200 model:
Area: 0.59x2.265 = 1.34m²

Power per area: 200W/1.34m² = 149.3 W/m².

Comparing to total irradiation for 1 m²: 149.3/1000 = 14.9% of efficiency, not the 23.4% showed.

The same for PV350S model:
Area: 2.382 × 0.925 = 2.20m²

350/2.20 = 159.1

Efficiency: 159.,1/1000 = 15.9%

That’s important for Bluetti to report the correct efficiency on their solar panels datasheet.

2

Hi @fabioluzo, Thank you for your interest in our products.
Your calculations are very thorough. However, please note that the power per unit area is calculated based on the area of the solar cells, not the total area of the solar panel. This may cause some discrepancies in the calculation results.

3

Hi, the efficiency for solar panel is calculated for all area of construction, not only the solar cell.

That’s the way you can find on brands like Canadian, Longi, Trina, etc. So, only for cells of course you can have a higher efficiency.

But we are talking about solar panel efficiency, as a whole, not only cells.

Please, look at this comparison on the Bluetti website (it’s in portuguese, but you can translate if needed): it says that the “Bluetti solar panel has a solar panel efficiency as 23.4%, while other brands has only 15%”:

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That’s wrong. Other brands has the same as high as 23%.