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electrical:12v:alternator [2021/04/03 13:18]
frater_secessus [gotchas] |
electrical:12v:alternator [2021/04/15 10:03]
frater_secessus [constant-duty solenoid] |
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| ((http://www.cheaprvliving.com/forums/Thread-Questions-about-continuous-duty-solenoid?pid=229761#pid229761)). SternWake recommends the [[http://amzn.to/2fZLFzs|Blue Sea 9012]]((http://www.cheaprvliving.com/forums/Thread-Questions-about-continuous-duty-solenoid?pid=229761#pid229761)) although [[https://amzn.to/2NLVwg0|non-marine units in the $20-$50 range]] are more common in vans. \\ Solenoids can be used for [[electrical:12v:self-jumpstarting|self-jumpstarting]] //if// the chassis battery has enough juice to engage the solenoid. | ((http://www.cheaprvliving.com/forums/Thread-Questions-about-continuous-duty-solenoid?pid=229761#pid229761)). SternWake recommends the [[http://amzn.to/2fZLFzs|Blue Sea 9012]]((http://www.cheaprvliving.com/forums/Thread-Questions-about-continuous-duty-solenoid?pid=229761#pid229761)) although [[https://amzn.to/2NLVwg0|non-marine units in the $20-$50 range]] are more common in vans. \\ Solenoids can be used for [[electrical:12v:self-jumpstarting|self-jumpstarting]] //if// the chassis battery has enough juice to engage the solenoid. |
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| | [[electrical:12v:voltage sensing delay|Voltages-sensing (delay)]] can be added to solenoids. |
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| ==== voltage-sensing relays ==== | ==== voltage-sensing relays ==== |
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| * Solar charging while the isolator circuit is closed (ie, batteries connected) can pass higher-than-normal voltage to the chassis and starter battery. Workaround: see notes on HVD and DC-DC charging below. | * Solar charging while the isolator circuit is closed (ie, batteries connected) can pass higher-than-normal voltage to the chassis and starter battery. Workaround: see notes on HVD and DC-DC charging below. |
| * Voltage-sensing relays can be unintentionally triggered((dVSR)) or "held closed"((both VSR and dVSR)) [[http://bdp.mousetrap.net/index.php/2018/10/27/side-effect-of-solar-alternator-charging/|by voltage from the solar-charged side]] in some scenarios. Workaround: address with HVD as below if desired, or with a DC-DC charger triggered by ignition rather than by chassis voltage. | * Voltage-sensing relays can be unintentionally triggered((dVSR)) or "held closed"((both VSR and dVSR)) [[http://bdp.mousetrap.net/index.php/2018/10/27/side-effect-of-solar-alternator-charging/|by voltage from the solar-charged side]] in some scenarios. Workaround: address with HVD as below if desired, or with a DC-DC charger triggered by ignition rather than by chassis voltage, or by putting a switch on the trigger wire. |
| * **Idling the engine** to charge house batteries **can overheat the alternator**,particularly older-style ones that do not reduce output to control high temps. Workaround: Don't plan to idle to charge from alternator. If you do, a fan may help cool the alternator. | * **Idling the engine** to charge house batteries **can overheat the alternator**,particularly older-style ones that do not reduce output to control high temps. Workaround: Don't plan to idle to charge from alternator. If you do, a fan may help cool the alternator. |
| * In early morning when house battery voltage is lowest, **a plain solenoid may unintentionally allow depleted batteries to pull down the starter battery**. Workarounds: use a VSR, or start the vehicle immediately after inserting the key((ie, do not leave in the Accessory position which would drain the starter battery)). | * In early morning when house battery voltage is lowest, **a plain solenoid may unintentionally allow depleted batteries to pull down the starter battery**. Workarounds: use a VSR, or start the vehicle immediately after inserting the key((ie, do not leave in the Accessory position which would drain the starter battery)). |
