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electrical:12v:multipoint_charging [2019/12/14 12:54] frater_secessus [how to make them cooperate] |
electrical:12v:multipoint_charging [2020/10/11 12:18] frater_secessus [concurrent charging] |
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===== concurrent charging ===== | ===== concurrent charging ===== | ||
- | So what happens when multiple chargers are running at the same time? Nothing dramatic, as it turns out. | + | So what happens when multiple chargers are running at the same time? Nothing dramatic, as it turns out.((The only caveat, for advanced users, is if one of your controller uses end-amps to signal the end of Absorption, it may [[http:// |
- | In general, **the charging source with the highest voltage will win**. | + | In general, **the charging source with the highest voltage will "win"**. |
==== why one source wins ==== | ==== why one source wins ==== | ||
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The alternator is just a plain alternator and puts out 14.0v all the time. | The alternator is just a plain alternator and puts out 14.0v all the time. | ||
The Morningstar charge controller is factory set to start Absorption at 14.4v.((i.e. Vabs == 14.4v)) | The Morningstar charge controller is factory set to start Absorption at 14.4v.((i.e. Vabs == 14.4v)) | ||
- | The Xantrex charge controller has been configured by you to start Absorption at 14.7v.((i.e. Vabs == 14.7v)) | + | The Xantrex charge controller has been configured by you to start Absorption at 14.7v.((i.e. Vabs == 14.7v)) ((Normally the controllers would be set to the same voltage but we will make them different to illustrate how it works.)) |
Let's charge that battery. | Let's charge that battery. | ||
- | * **12.2v** at daybreak, approximately 50% [[electrical: | + | * **12.2v** at daybreak, approximately 50% [[electrical: |
- | * **13.9v** a few miles down the road. Voltage is climbing but all three sources are still charging. | + | * **13.9v** a few miles down the road. Voltage is climbing but all three sources are still charging. The sun is higher in the sky so the panels are making more power now. |
- | * **14.1v** by the you get to a neighboring town. **Alternator charging ceased at 14.0v**; it has plenty of current but no voltage " | + | * **14.1v** by the you get to a neighboring town. **Alternator charging ceased at 14.0v**; it has plenty of current but no voltage " |
- | * **14.6v** in the parking lot as you stop at an Oasis [[:water|water kiosk]]. | + | * **14.6v** in the parking lot as you stop at an Oasis [[water:drinking|water kiosk]]. |
* **14.7v** on your way back to camp. This is Absorption setpoint (Vabs) of the Xantrex, the highest setpoint of all three. | * **14.7v** on your way back to camp. This is Absorption setpoint (Vabs) of the Xantrex, the highest setpoint of all three. | ||