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opinion:frater_secessus:dead_battery [2022/08/03 20:07] frater_secessus created |
opinion:frater_secessus:dead_battery [2022/08/06 19:20] (current) frater_secessus [replace any damaged components] |
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+ | DRAFT | ||
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====== How to handle a dead house battery ====== | ====== How to handle a dead house battery ====== | ||
- | If your house bank (" | + | If your [[electrical: |
===== first things first ===== | ===== first things first ===== | ||
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- turn off all loads so your battery and any charging attempts aren't trying to run the household | - turn off all loads so your battery and any charging attempts aren't trying to run the household | ||
- disconnect solar panels, if solar is present, for the reasons given [[electrical: | - disconnect solar panels, if solar is present, for the reasons given [[electrical: | ||
- | - apply some kind of charging - any charge is better than none in this scenario | + | - apply some kind of charging - any charge is better than none in this scenario |
- when any solar charge controller comes back online((normal LEDS, etc)) reconnect solar panels | - when any solar charge controller comes back online((normal LEDS, etc)) reconnect solar panels | ||
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==== sources of charging ==== | ==== sources of charging ==== | ||
- | The fastest form of charging is by [[electrical: | + | The fastest form of charging is by [[electrical: |
+ | Note: if using [[electrical: | ||
Solar, if present, will often be a gentler charging method. | Solar, if present, will often be a gentler charging method. | ||
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+ | ===== fix the underlying problem ===== | ||
+ | |||
+ | - ensure all charging methods are configured to meet your battery manufacturer' | ||
+ | - if charging by solar ensure the panels are [[electrical: | ||
+ | - ensure all connections are good: battery connections, | ||
+ | - get your [[electrical: | ||
+ | |||
+ | |||
+ | ===== replace any damaged components ===== | ||
+ | |||
+ | Yes, your battery may be toast but there is no use replacing it until you get the underlying issues fixed. | ||
+ | |||
+ | If you know the battery is " | ||
+ | |||
+ | |||
+ | ===== lithium considerations ===== | ||
+ | |||
+ | With lithium banks over-discharge is not the only problem that can cause the battery to stop working. | ||
+ | |||
+ | |||
+ | |||
+ | ==== resetting the BMS ==== | ||
+ | |||
+ | Some Li batteries have special devices that can be inserted into ports to reset the BMS. Most, however, use a separate charging source to tell the BMS all is well. Something like 13v and 3A is typical. | ||
+ | |||
+ | |||
+ | ==== addressing the problem ==== | ||
+ | |||
+ | If the BMS shut off because of freezing temperatures it is critical to warm the battery before charging. | ||
+ | |||
+ | If the BMS shut off because of cell imbalance try charging to a lower Absorption((" | ||
+ | |||
+ | If the BMS shut off because of overcurrent discontinue the load that caused it. | ||
+ | After the underlying issue is address charge the bank gently to a normal SoC((≥20%)) before charging with full force. | ||
+ | ===== don't beat yourself up ===== | ||
+ | Now that the ship is righted again, take solace in the fact that many before you have made these same mistakes before. | ||