This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
lifestyle:faq_solar_generator [2024/02/05 18:50] princess_fluffypants |
lifestyle:faq_solar_generator [2024/05/12 14:03] frater_secessus [solar input] |
||
---|---|---|---|
Line 43: | Line 43: | ||
---- | ---- | ||
+ | ===== troubleshooting ===== | ||
+ | |||
+ | see [[12v: | ||
===== Specifications ===== | ===== Specifications ===== | ||
Line 103: | Line 106: | ||
Many smaller units have quite restrictive solar input limits. | Many smaller units have quite restrictive solar input limits. | ||
- | * **voltage** - 22Voc is a common voltage limit, effectively limiting one to [[electrical: | + | * **voltage** - 24Voc is a common voltage limit, effectively limiting one to [[electrical: |
- | * **current** limit - 3A is a common input current limit on smaller, less-expensive units. | + | * **current** limit - 3A is a common input current limit on smaller, less-expensive units. |
* With PWM controllers the max power harvestable will be 3A x [internal battery voltage], which can be as low as 9v. 9v x 3A 27w. | * With PWM controllers the max power harvestable will be 3A x [internal battery voltage], which can be as low as 9v. 9v x 3A 27w. | ||
* MPPT controllers with the same limit might run the panels at 18v, the Vmp: 18v x 3A = 54w((minus DC-DC conversion losses of ~5%)) | * MPPT controllers with the same limit might run the panels at 18v, the Vmp: 18v x 3A = 54w((minus DC-DC conversion losses of ~5%)) | ||
+ | |||
+ | == the Amp bottleneck == | ||
+ | |||
+ | Because the Amp limit is usually the limiting factor for power production, selecting a panel with a Voc((// | ||
+ | |||
+ | * 22.5Voc panel - Vmp ~18v.((Vmp is typically 0.8 of Voc)) 18v x 8A limit = **144w**. | ||
+ | * 21Voc panel - Vmp ~16.8v. | ||
Line 219: | Line 229: | ||
===== manufacturers ===== | ===== manufacturers ===== | ||
+ | |||
+ | [note: | ||
The most common " | The most common " |