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electrical:solar:charge_controller [2023/09/26 11:25] frater_secessus [how to choose] |
electrical:solar:charge_controller [2023/12/13 10:36] frater_secessus [specs] |
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Regardless of type, controllers will have several specifications in common. | Regardless of type, controllers will have several specifications in common. | ||
- | * **rating (or " | + | * **rating (or " |
* **12v/ | * **12v/ | ||
* **Maximum input voltage** - the highest voltage the controller should //ever// see from the solar array.((it is common to leave ~20% margin)) | * **Maximum input voltage** - the highest voltage the controller should //ever// see from the solar array.((it is common to leave ~20% margin)) | ||
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[note: | [note: | ||
There are //DC-DC converting charge controllers// | There are //DC-DC converting charge controllers// | ||
+ | |||
+ | |||
+ | ==== boosting ==== | ||
+ | |||
+ | Most charge controllers that convert voltage do it by //bucking// (reducing) panel voltage down to the appropriate charging voltages.((normal PWM don't reduce/ | ||
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+ | // | ||
==== how to choose ==== | ==== how to choose ==== | ||
**PWM is a reasonable default choice** in typical scenarios((12v house power, 12v panels)); they work well enough and are inexpensive. PWM controllers can cost half or a third of their MPPT workmates for any given rated output.((10A, | **PWM is a reasonable default choice** in typical scenarios((12v house power, 12v panels)); they work well enough and are inexpensive. PWM controllers can cost half or a third of their MPPT workmates for any given rated output.((10A, |