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electrical:solar:panel-bank_ratio [2018/05/19 08:00] frater_secessus |
electrical:solar:panel-bank_ratio [2020/06/24 21:05] frater_secessus [1:2 underpaneling] |
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====== Panel:Bank ratio ====== | ====== Panel:Bank ratio ====== | ||
- | + | A common rule of thumb for sizing batteries to solar power relates nominal panel output in Watts to bank capacity in Ah. It is not gospel. | |
- | A common rule of thumb for sizing batteries to solar power relates nominal panel output in Watts to bank capacity in Ah. It is not gospel. | + | |
===== 1:1 ===== | ===== 1:1 ===== | ||
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//1:1// == 200W solar + 200Ah battery bank. | //1:1// == 200W solar + 200Ah battery bank. | ||
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This generally considered the minimum, though it will likely work out fine in [[electrical: | This generally considered the minimum, though it will likely work out fine in [[electrical: | ||
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[[electrical: | [[electrical: | ||
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===== 2:1 overpaneling ===== | ===== 2:1 overpaneling ===== | ||
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//2:1// == 200W solar + 100Ah of battery. | //2:1// == 200W solar + 100Ah of battery. | ||
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This slightly [[electrical: | This slightly [[electrical: | ||
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===== 3:1 overpaneling ===== | ===== 3:1 overpaneling ===== | ||
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//3:1// == 300W solar + 100Ah of battery. | //3:1// == 300W solar + 100Ah of battery. | ||
- | + | This significantly overpaneled configuration generally yields an excess of power, | |
- | This significantly overpaneled configuration generally yields an excess of power, | + | ' |
- | + | ||
===== 1:2 underpaneling ===== | ===== 1:2 underpaneling ===== | ||
+ | //1:2// == 100W solar + 200Ah of battery. | ||
+ | Also known as [[electrical: | ||
+ | * solar charging is [[electrical: | ||
+ | * the battery bank is [[electrical: | ||
+ | Outside the above configurations, | ||
+ | ===== battery health ===== | ||
- | //1:2// == 100W solar + 200Ah of battery. (underpaneling or [[electrical: | + | Different |
- | + | ||
+ | * lithium - no minimum, charge at any rate up to the max | ||
+ | * flooded lead-acid: | ||
+ | * minimum ratio with MPPT = 1.25w:1ah | ||
+ | * minimum ratio with MPPT = 1.5w: | ||
+ | * AGM lead-acid: | ||
+ | * minimum ratio with MPPT = 2.5w:1ah | ||
+ | * minimum ratio with MPPT = 3w: | ||