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electrical:12v:multipoint_charging [2018/08/26 10:03] frater_secessus [why one source wins] |
electrical:12v:multipoint_charging [2019/12/14 12:54] frater_secessus [how to make them cooperate] |
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. |
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In general, **the charging source with the highest voltage will win**. The only caveat is that if one of your controller uses end-amps to signal the end of Absorption, it may get confused and drop out early.((http://forum.solar-electric.com/discussion/comment/389634#Comment_389634)) | In general, **the charging source with the highest voltage will win**. The only caveat, for advanced users, is if one of your controller uses end-amps to signal the end of Absorption, it may get confused and drop out early.((http://forum.solar-electric.com/discussion/comment/389634#Comment_389634)) |
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==== why one source wins ==== | ==== why one source wins ==== |
So how do we make them all charge all the time? | So how do we make them all charge all the time? |
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Barring heroic measures((exotic alternators/regulators, DC-DC chargers)) the alternator is going to stop contributing at some point during Bulk charging. That is ok, the alternator provided a ton of current while it was charging. | Barring heroic measures((exotic alternators/regulators, [[electrical:12v:b2b|DC-DC chargers]])) the alternator is going to stop contributing at some point during Bulk charging. That is ok, the alternator provided a ton of current while it was charging. |
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But if you want to the charge controllers (and some [[electrical:converter|converters]]) can be convinced to stay roughly in sync and keep charging together. This is done by **configuring the Absorption and Float setpoints on the controllers to be the same**.((including Absorption termination setpoints like time or current)) There will be short periods where one controller makes a change before the other, but for most of the time both will be contributing at the same time. | But if you want to the charge controllers (and some [[electrical:converter|converters]]) can be convinced to stay roughly in sync and keep charging together. This is done by **configuring the Absorption and Float setpoints on the controllers to be the same**.((including Absorption termination setpoints like time or current)) There will be short periods where one controller makes a change before the other, but for most of the time both will be contributing at the same time. |