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electrical:solar:mppt_design [2021/07/19 23:17] frater_secessus [input voltage] |
electrical:solar:mppt_design [2021/07/19 23:35] frater_secessus [MPPT integration] |
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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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+ | * poly panel with 17v Vmp | ||
+ | * 90F ambient temps which derates panel by 18% (Vmp is now 13.94) | ||
+ | * wiring losses of 2% (panel voltage entering controller is now 13.66v) | ||
+ | * a controller that requires Vbatt + 1v to do MPPT | ||
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+ | ...means the controller can't do MPPT charging above 12.66v; | ||
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+ | An MPPT controller can also be the centerpiece of [[electrical: | ||