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electrical:12v:b2b [2023/09/23 14:49]
frater_secessus [Limitations] |
electrical:12v:b2b [2023/09/23 14:52] (current)
frater_secessus [sizing] moved editorial |
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| The DC-DC should be big enough to meet your charging targets given the amount of driving you do and the | The DC-DC should be big enough to meet your charging targets given the amount of driving you do and the |
| contributions of [[electrical:12v:alt_and_solar|other forms of charging]]. It should be small enough that the [[electrical:12v:alternator_details#current|alternator can provide the power continuously]].((Some DC-DC can be derated in the settings in 5A or 10A increments. IOW, you might run your 50A DC-DC at 35A after observing how the system operates.)) | contributions of [[electrical:12v:alt_and_solar|other forms of charging]]. It should be small enough that the [[electrical:12v:alternator_details#current|alternator can provide the power continuously]].((Some DC-DC can be derated in the settings in 5A or 10A increments. IOW, you might run your 50A DC-DC at 35A after observing how the system operates.)) **An oversized DC-DC charger cannot protect the alternator**. |
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| Note that [[opinion:frater_secessus:charging_faster|bigger is not always better]]; different battery chemistries and capacities accept current at different rates. Buying more charging capacity than the battery wants((or should have for its own good, see Li below)) is a waste of money. Buying more charging capacity than your alternator can deliver constantly can overheat/damage the alternator. **An oversized DC-DC charger cannot protect the alternator**. | Note that [[opinion:frater_secessus:charging_faster|bigger is not always better]]; different battery chemistries and capacities accept current at different rates. Buying more charging capacity than the battery wants((or should have for its own good, see Li below)) is a waste of money. Buying more charging capacity than your alternator can deliver constantly can overheat/damage the alternator. |
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| **Assuming a 100Ah bank**: | **Assuming a 100Ah bank**: |
