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electrical:solar:mppt_design [2021/07/19 23:17] frater_secessus [input voltage] |
electrical:solar:mppt_design [2021/07/19 23:40] frater_secessus [input voltage] |
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====== MPPT integration ====== | ====== MPPT integration ====== | ||
- | There are benefits from using [[electrical: | + | There are benefits from using [[electrical: |
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+ | The downside is that MPPT // | ||
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+ | Worst case scenario: | ||
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+ | * low Vmp 12v panel, like a poly panel with Vmp of 17v | ||
+ | * 90F ambient temps, | ||
+ | * wiring losses of 2% (panel voltage entering controller is now 13.66v) | ||
+ | * a controller that requires Vbatt + 1v to maintain MPPT operation | ||
+ | |||
+ | ...means the controller can't do MPPT charging above 12.66v; | ||
+ | |||
+ | * higher-Vmp panels | ||
+ | * higher-voltage panels | ||
+ | * panels in series | ||
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* generic rule of thumb: | * generic rule of thumb: | ||
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+ | ===== other uses ===== | ||
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+ | An MPPT controller can also be the centerpiece of [[electrical: |