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Post by bupkis on Aug 17, 2018 11:56:54 GMT
For those asking about what value the panels demonstrate in full perpendicular sun, the unfortunate answer is that it depends. The panels create electricity on factors such as temperature, air mass, and the sun's rays--insolation. In industry, the specifications are defined as to how the panels perform in 25C temperature, with air mass of 1.5 and insolation being 1000W/m^2 (lab setting). Values that stay within 20% might be a good indicator of a well performing panel. All the best! -Renogy Team Don't forget charge controller 'mode'. If the environment is such that the panels could make 30A but the controller is limiting that to say 3A then the panels are only making 3A. Lot's of wasted power when batteries are full and/or floating. |
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Post by captainstone on Aug 17, 2018 16:22:08 GMT
For those asking about what value the panels demonstrate in full perpendicular sun, the unfortunate answer is that it depends. The panels create electricity on factors such as temperature, air mass, and the sun's rays--insolation. In industry, the specifications are defined as to how the panels perform in 25C temperature, with air mass of 1.5 and insolation being 1000W/m^2 (lab setting). Values that stay within 20% might be a good indicator of a well performing panel. All the best! -Renogy Team Don't forget charge controller 'mode'. If the environment is such that the panels could make 30A but the controller is limiting that to say 3A then the panels are only making 3A. Lot's of wasted power when batteries are full and/or floating. What is the controller’s default? |
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Post by bupkis on Aug 17, 2018 16:57:16 GMT
The default charge mode? There are three basic modes detailed in the manual.
Charge to set pt voltage based on battery type selected (this is in the manual also), the set pt voltage is adjusted by temperature (loweer above 80F and higher below 80F). This stage uses all the panel power that is available at the time.
Once this set pt voltage is reached then the controller regulates, it holds this set pt voltage constant for some period of time set out in the manual. Different controllers have different ways to end this stage, time or minimal charge current etc.
Once the above mode terminates then float stage begins, in this mode the cotroller tries to hold the battery @ float voltage as set in the manual for battery type. It stays in this mode till the sun goes down or you use enough power for the first stage to start over!
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