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electrical:12v:drop-in_lifepo4
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electrical:12v:drop-in_lifepo4 [2022/10/18 12:13] frater_secessus [myth: you must use DC-DC for alternator charging Li] |
electrical:12v:drop-in_lifepo4 [2022/11/06 10:52] frater_secessus [Why are manufacturer-recommended charging voltages so high?] |
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| ==== Why are manufacturer-recommended charging voltages so high? ==== | ==== Why are manufacturer-recommended charging voltages so high? ==== | ||
| - | Manufacturers need simple instructions that will still allow the batteries to meet their advertised lifetime and reduce customer support issues. In this scenario higher charging voltages have the following benefits to the seller: | + | Manufacturers need simple instructions that will still allow the batteries to meet their advertised lifetime and reduce customer support issues. In this scenario higher charging voltages have the following benefits |
| * allow use of conventional lead-chemistry battery chargers or " | * allow use of conventional lead-chemistry battery chargers or " | ||
| Line 253: | Line 253: | ||
| * you already have an [[electrical: | * you already have an [[electrical: | ||
| - | * even if you have no isolator installed an isolator is much less expensive, costing as little as 1/10th the price of DC-DC. If after testing you do decide to go DC-DC you can carry the isolator as a backup. | + | * even if you have no isolator installed an isolator is much less expensive, costing as little as 1/10th the price of DC-DC. If after testing you do decide to go DC-DC you can carry the isolator as a backup. Or daisy-chain the DC-DC behind it for units that use D+ rather than voltage triggering. |
| * an isolator is likely to charge with more current than smaller (~20A) DC-DC units during shorter drives.((On longer drives the DC-DC will be able to provide higher voltage than the alternator so its current will remain stable while isolator current drops with the voltage delta)) | * an isolator is likely to charge with more current than smaller (~20A) DC-DC units during shorter drives.((On longer drives the DC-DC will be able to provide higher voltage than the alternator so its current will remain stable while isolator current drops with the voltage delta)) | ||
| * you want to be able to [[electrical: | * you want to be able to [[electrical: | ||
electrical/12v/drop-in_lifepo4.txt ยท Last modified: 2024/04/12 23:02 by frater_secessus
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