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electrical:12v:self-jumpstarting [2020/05/11 10:18] frater_secessus [solenoids] |
electrical:12v:self-jumpstarting [2020/06/23 11:50] frater_secessus [jumping from the house bank] |
Self-jumpstarting means jumpstarting one's own vehicle without the use of another vehicle. The most common way to do this is by [[electrical:12v:alternator|combining]] house and chassis batteries. | Self-jumpstarting means jumpstarting one's own vehicle without the use of another vehicle. The most common way to do this is by [[electrical:12v:alternator|combining]] house and chassis batteries. |
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It will be easiest on the system to combine the batteries and allow the starter battery to come up a bit instead of immediately attempting to start. | |
===== solenoids ===== | |
| ===== jumping from the house bank ===== |
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| It will be gentlest on the system to combine the batteries and allow the starter battery to come up a bit instead of immediately attempting to start. |
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| ==== manual switches ==== |
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| Switches used as manual isolators will self-jumpstart when in the ON position. |
| ==== solenoids ==== |
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Solenoids/relays //always// self-jumpstart assuming there is enough voltage in the starter battery to energize the solenoid. It is a mechanical connection and power will flow both ways. | Solenoids/relays //always// self-jumpstart assuming there is enough voltage in the starter battery to energize the solenoid. It is a mechanical connection and power will flow both ways. |
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===== voltage sensing relays ===== | ==== voltage sensing relays ==== |
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It is common for VSRs to have a button to combine the batteries for self-jumpstarting. | It is common for VSRs to have a button to combine the batteries for self-jumpstarting. |
===== relays ===== | |
| ==== relays ==== |
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[[electrical:12v:alternator#isolators|Solid state isolators]] are diode based and will not allow power to flow from the house battery to the starter battery. Therefore they cannot be used to self-jumpstart. | [[electrical:12v:alternator#isolators|Solid state isolators]] are diode based and will not allow power to flow from the house battery to the starter battery. Therefore they cannot be used to self-jumpstart. |
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| ==== DC-DC chargers ==== |
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| Some [[electrical:12v:b2b|DC-DC chargers]] with integrated [[electrical:solar:charge_controller|solar charge controllers]] can keep the starter battery maintained after the house batteries are charged. This would help avoid the "dead starter battery" situation in the first place. |
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| [Note from secessus: AFAIK none of the DC-DC chargers allow self-jumpstarting. If anyone knows otherwise, please point me to the documentation. Thanks!] |
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===== jump packs ===== | ===== jump packs ===== |