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electrical:solar:mppt_design [2018/11/20 13:22] frater_secessus |
electrical:solar:mppt_design [2018/11/20 13:34] frater_secessus [input voltage] |
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There are benefits from using [[electrical: | There are benefits from using [[electrical: | ||
- | MPPT manufacturers always specify a maximum voltage coming into the panels; some also specify a minimum or optimium voltage. | + | |
+ | ===== input voltage ===== | ||
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+ | Input voltage is a balancing act between efficiency / heat reduction (requires lower input voltage), the ability to overcome self-consumption losses under all conditions (requires higher input voltage), wire size and length (higher input voltage), and shading mitigation (higher input voltage). | ||
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+ | MPPT manufacturers always specify a maximum voltage coming into the controller; some also specify a minimum or optimium voltage. | ||
* Victron: | * Victron: | ||
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* SNA (grid tied): Vpanel = desired output * 1.4142((https:// | * SNA (grid tied): Vpanel = desired output * 1.4142((https:// | ||
* generic rule of thumb: | * generic rule of thumb: | ||
- | * generic rule of thumb: | + | * generic rule of thumb: |
- | + | ||
- | MPPT controllers are most efficient when input voltage (Vpanel) is about 2x nominal battery voltage (Vbatt). | + | |