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electrical:12v:b2b [2024/05/15 14:05] frater_secessus [Renogy] |
electrical:12v:b2b [2024/06/02 20:19] frater_secessus [is DC-DC charging mandatory?] |
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See [[electrical: | See [[electrical: | ||
+ | |||
+ | ==== triggering / isolation ==== | ||
+ | |||
+ | The general idea is to feed power from the chassis (usually the starter battery) to the house battery when the alternator is making power, and isolate the two from each other when it is not. The DC-DC will handle this in one of two ways: | ||
+ | |||
+ | * voltage sensing - watching chassis voltage like [[electrical: | ||
+ | * by receiving a trigger signal (AKA " | ||
===== sizing ===== | ===== sizing ===== | ||
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=== RBC series === | === RBC series === | ||
+ | |||
+ | NOTE: there are two distinct versions of the RBC line. Both appear to have PV input limits higher than 25v found in the older DCC line. Major differences appear to be: | ||
+ | |||
+ | * DS - built-in Bluetooth, support for both 12v/24v banks. | ||
+ | * D1S - no built-in Bluetooth, 12v banks only. Uses traditional DCC case. | ||
+ | |||
+ | |||
+ | == RBC2125DS == | ||
+ | |||
{{ https:// | {{ https:// | ||
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Note: some manual versions brand this unit as part of the " | Note: some manual versions brand this unit as part of the " | ||
- | The [[https:// | + | This version is for both **12v and 24v banks**. |
- | The existing | + | The [[https://www.renogy.com/renogy-12v-24v-ip67-50a-dc-dc-battery-charger-with-mppt/ |
+ | >> Ensure that the open circuit voltage of the solar panel/solar panel array does not exceed 50V | ||
+ | |||
+ | Update: | ||
== solar+alternator behavior == | == solar+alternator behavior == | ||
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+ | == RBC30D1S and RBC50D1S == | ||
+ | |||
+ | The D**1**S series appears to be a DCC charger with higher PV input limits: | ||
+ | |||
+ | >> For [the] 30A battery charger, ensure that the working voltage of the solar panel / solar panel array does not exceed **30V**. For [the] 50A battery charger, ensure that the working voltage of the | ||
+ | solar panel / solar panel array does not exceed **50V**. | ||
+ | [[https:// | ||
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{{ https:// | {{ https:// | ||
- | SRNE makes [[https:// | + | SRNE makes [[https:// |
* output rating based on solar. | * output rating based on solar. |