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electrical:solar:sizing [2019/02/08 13:02] frater_secessus [Sizing a solar installation] |
electrical:solar:sizing [2019/10/01 13:00] frater_secessus [usable capacity in Amp-hours] |
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**Example:** You need 100AH x 1 day, so your bank will be 200AH cycled 50% each day. \\ | **Example:** You need 100AH x 1 day, so your bank will be 200AH cycled 50% each day. \\ |
**Example:** [[electrical:12v:lifepo4_batteries_thread|LiFePO4]] can be drained down to 80%-90% DoD so you would need only 110AH of rated capacity with that chemistry. 120AH if you are conservative. | **Example:** [[electrical:12v:deep_cycle_battery#lithium_chemistries|LiFePO4]] can be drained down to 80%-90% DoD so you would need only 110AH of rated capacity with that chemistry. 120AH if you are conservative. |
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Solar power often works best when paired with another power source. This is because the first half and second half of [[electrical:12v:charging|smart charging]] have different time/power ramifications | Solar power often works best when paired with another power source. This is because the first half and second half of [[electrical:12v:charging|smart charging]] have different time/power ramifications |
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- **high current / short duration** during Bulk <-- [[electrical:generator|generators]], [[electrical:shore_power|shore power]] [[electrical:converter|converters]] and [[electrical:12v:alternator|alternator]] charging does this best | - **high current / short duration** during Bulk <-- [[electrical:generator|generator]], [[electrical:shore_power|shore power]] [[electrical:converter|converter]] and [[electrical:12v:alternator|alternator]] charging do this best |
- **low current / long duration** once Absorption gets underway, and during Float <-- solar does this best | - **low current / long duration** once Absorption gets underway, and during Float <-- solar does this best |
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===== maxxed system ===== | ===== maxxed system ===== |
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If you FIXME | In **'dweller solar configurations** the order of sizing calculations may be different due to space or budget limitations. Few of us will be able to fit all the solar panels we need to run every [[electrical:12v:loads|load]] on our wishlist. In this case we size our systems for the maximum amount of panels we can fit in the space allowed. This might be what fits in open space on our roof, or how much portable panel we are willing to deploy. |
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| - max solar wattage you can install (or afford) |
| - whether your have access to other forms of charging: [[electrical:shore_power|shore power]], [[electrical:12v:alternator|alternator]] |
| - max battery capacity you can charge fully/consistently (or afford, or install) |
| - these factors will tell you what kind of loads you can run. |
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