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opinion:solar:sizing.walkthrough [2022/04/20 14:51] frater_secessus [minimum charging current] |
opinion:solar:sizing.walkthrough [2022/05/27 14:59] frater_secessus [Solar sizing walkthrough] |
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* how much power we will require - every single watt | * how much power we will require - every single watt | ||
* where we will camp, and what time of year we will be there | * where we will camp, and what time of year we will be there | ||
- | * avoiding shade and so the panels can actually work | + | * avoiding shade so the panels can actually work |
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Solar harvest directly affects how much panel we will need, but [[electrical: | Solar harvest directly affects how much panel we will need, but [[electrical: | ||
- | The good news is that different locations get roughly predictable average amounts of sunlight during specified months, and scientists have tabulated this data. The data is expressed in terms of hours of Full Sun Equivalent and assumes flat-mounted panels. | + | The good news is that different locations get roughly predictable average amounts of sunlight during specified months, and [[https:// |
- | + | ||
- | Example: | + | |
- | + | ||
- | In practice 100% yield is not normal. | + | |
- | + | ||
- | * theoretical - 1,200Wh harvest | + | |
- | * MPPT - 1,200Wh x 0.85 = 1,020Wh harvest | + | |
- | * PWM - 1,200Wh x 0.72 = 864Wh harvest | + | |
==== where and when we are camping ==== | ==== where and when we are camping ==== | ||
- | The actual hours of FSE will depend on where we are and month of the year. If we want the solar to Just Work((by itself, no help from [[electrical: | + | The actual hours of FSE will depend on where we are and month of the year. If we want the solar to Just Work((by itself, no help from [[electrical: |
* vacation-camping with the family in Montana only in the summer | * vacation-camping with the family in Montana only in the summer | ||
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- | We can work backward from FSE and required Wh to get our required panel: | + | We can work backward from FSE and required Wh to get our required panel: |
* **Montana in July** - 2, | * **Montana in July** - 2, |