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opinion:solar:sizing [2022/05/08 11:16] frater_secessus [controller choice] |
opinion:solar:sizing [2022/05/24 15:12] frater_secessus [days of reserve] |
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[[lifestyle: | [[lifestyle: | ||
- | ====== | + | ====== |
There are many [[electrical: | There are many [[electrical: | ||
+ | |||
+ | See [[opinion: | ||
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Sizing for an overnight camping trip is easy; sizing for a three day trip a challenge; | Sizing for an overnight camping trip is easy; sizing for a three day trip a challenge; | ||
+ | ===== battery bank ===== | ||
- | ===== solar panels | + | Once you know your daily power and reserve requirements you can spec out a battery |
+ | |||
+ | |||
+ | Having an **undersized bank** means //running out of power// at night. | ||
+ | |||
+ | Having an **oversized lead bank** for your charging ability results in [[electrical: | ||
+ | |||
+ | IMO, with lead chemistries((flooded, | ||
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+ | You will **need somewhat more Ah capacity** | ||
+ | |||
+ | * if you have undersized solar | ||
+ | * you have lead-chemistry battery bank | ||
+ | |||
+ | You will need **somewhat less Ah capacity** | ||
+ | |||
+ | * if you run loads in the daytime instead of at night | ||
+ | * if you have [[electrical: | ||
+ | * you have lithium-chemistry battery bank((can be ~0.62% the size of the lead bank, due to deeper [[electrical: | ||
+ | |||
+ | |||
+ | ===== solar charging | ||
+ | |||
+ | |||
+ | ==== solar panels | ||
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- | ===== solar charge controller | + | ==== solar charge controller ==== |
- | ==== controller choice | + | |
+ | === controller choice === | ||
The [[electrical: | The [[electrical: | ||
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- | ==== controller sizing | + | === controller sizing === |
[[electrical: | [[electrical: | ||
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- | ===== battery bank ===== | ||
- | Having an **undersized bank** means //running out of power// at night. | ||
- | |||
- | Having an **oversized lead bank** for your charging ability results in [[electrical: | ||
- | |||
- | IMO, it is better to have an undersized bank you can charge //fully and consistently// | ||
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- | You will **need somewhat more Ah capacity** | ||
- | |||
- | * if you have undersized solar | ||
- | |||
- | You will need **somewhat less Ah capacity** | ||
- | |||
- | * if you run loads in the daytime instead of at night | ||
- | * if you have [[electrical: | ||
===== alternator charging ===== | ===== alternator charging ===== | ||
- | For most people living in vehicles [[electrical: | + | For many people living in vehicles [[electrical: |
You will need **some kind of alternator charging** | You will need **some kind of alternator charging** | ||
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* you have a voltage-sensitive battery like gel or lithium | * you have a voltage-sensitive battery like gel or lithium | ||
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+ | ===== generator charging ===== | ||
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+ | You may need a generator if: | ||
+ | |||
+ | * you need to run big loads like A/C | ||
+ | * you have a lithium battery bank but camp in long stretches with minimal solar. | ||
+ | * you have enough solar to [[electrical: | ||