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electrical:12v:alternator [2020/06/23 13:10]
frater_secessus [limitations] |
electrical:12v:alternator [2020/06/25 11:49]
frater_secessus [misc] |
| Alternator charging is generally only practical for the [[electrical:12v:charging|bulk charge stage]] due to relatively low voltage output and the [[electrical:12v:charging|long time periods required for absorption]].(([[electrical:12v:b2b|DC-DC chargers]] can help with the voltage)) It is unlikely to get the house battery completely charged unless one is driving significant distances. This can have an impact on [[electrical:batterycide|battery longevity]]. If one drives often [[electrical:12v:alt_and_solar|a combination of the alternator doing bulk charging and a small solar doing the rest]] is good match. | Alternator charging is generally only practical for the [[electrical:12v:charging|bulk charge stage]] due to relatively low voltage output and the [[electrical:12v:charging|long time periods required for absorption]].(([[electrical:12v:b2b|DC-DC chargers]] can help with the voltage)) It is unlikely to get the house battery completely charged unless one is driving significant distances. This can have an impact on [[electrical:batterycide|battery longevity]]. If one drives often [[electrical:12v:alt_and_solar|a combination of the alternator doing bulk charging and a small solar doing the rest]] is good match. |
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| Vehicles with //smart// (variable voltage) alternators may not be suitable for charging with normal isolators. See [[electrical:12v:b2b|DC-DC chargers]]. | Vehicles with //smart// (variable voltage) alternators may not be suitable for charging with normal isolators.((https://www.redarc.com.au/how-do-i-know-if-i-have-a-variable-voltage-smart-alternator)) See [[electrical:12v:b2b|DC-DC chargers]]. |
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| See [[electrical:12v:mandatory solar|Is Solar Mandatory?]] for ideas on how to charge primarily by alternator. | See [[electrical:12v:mandatory solar|Is Solar Mandatory?]] for ideas on how to charge primarily by alternator. |
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| A [[http://amzn.to/2gsDtNc|manual battery switch]] normally has 4 positions: A, B, A+B, and Off. A would be for the starter battery and used during starting. B would be used for house use when one is not driving. A+B could be used to combine both sets for starting or for charging while driving. This kind of setup is prone to user error. A manual switch has no current or voltage losses. | A [[http://amzn.to/2gsDtNc|manual battery switch]] normally has 4 positions: A, B, A+B, and Off. A would be for the starter battery and used during starting. B would be used for house use when one is not driving. A+B could be used to combine both sets for starting or for charging while driving. This kind of setup is prone to user error. A manual switch has no current or voltage losses. |
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| | ==== misc ==== |
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| | [note from secessus: "not sure what's inside these solid state isolators"] |
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| | [[https://amzn.to/3fVuKh0|{{ https://m.media-amazon.com/images/I/51XoShK5uIL._AC_UY218_.jpg?125}}]] |
| | The [[https://amzn.to/3fVuKh0|Magnum Energy ME-SBC]] is notable for some unusual features: |
| | * configurable connect/disconnect setpoints |
| | * ability to drive a solenoid, which allows for much greater current |
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| | Xantrex makes [[https://amzn.to/3eKhkEc|a 15A Digital-Echo Charge isolator]]. |
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| ===== sizing an isolator ===== | ===== sizing an isolator ===== |
