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electrical:batterycide [2018/01/21 19:05] frater_secessus [murdering flooded lead-acid] |
electrical:batterycide [2019/05/17 22:15] frater_secessus [murdering AGM] |
Flooded lead-acid (FLA) batteries are the most resillient to mistreatment but they too can be killed. | Flooded lead-acid (FLA) batteries are the most resillient to mistreatment but they too can be killed. |
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* leaving them at [[electrical:12v:psoc|partial state of charge]], resulting in //irreversible// sulfation | * leaving them at [[electrical:12v:psoc|partial state of charge]], resulting in //irreversible// sulfation((AKA "hard" sulfation. The battery undergoes "soft" sulfation and desulfation during normal charging/discharging.)) |
* not charging soon enough; they need charging every day | * not charging soon enough; fully charging each day is best. |
* not charging fully; they need a [[electrical:12v:charging#absorption_stage|long Absorption stage]] at manufacturer-recommended voltage to reverse normally-occurring ("soft") sulfation.((http://support.rollsbattery.com/support/solutions/articles/5964-battery-sulfation)) \\ [[electrical:generator#charging_batteries|Generator-only charging]] can cause this unless the generator runs the necessary number of hours it takes to complete Absorption. \\ Less commonly, [[electrical:solar|Solar]]-only charging can cause this problem if the [[electrical:solar:sizing|battery capacity is too great for the solar output]]. | * not charging fully; they need a [[electrical:12v:charging#absorption_stage|long Absorption stage]] at manufacturer-recommended voltage to reverse normally-occurring ("soft") sulfation.((http://support.rollsbattery.com/support/solutions/articles/5964-battery-sulfation)) \\ [[electrical:generator#charging_batteries|Generator-only charging]] can cause this unless the generator runs the necessary number of hours it takes to complete Absorption. \\ Less commonly, [[electrical:solar|Solar]]-only charging can cause this problem if the [[electrical:solar:sizing|battery capacity is too great for the solar output]]. |
* discharging too deeply. Maximum discharge should be 50% [[electrical:depth_of_discharge|depth of discharge]]. | * discharging too deeply. Maximum discharge is typically limited to 50% [[electrical:depth_of_discharge|depth of discharge]]. |
* allowing the cells to get low on distilled water. Check them 1x/month or so until you learn their personality. | * allowing the cells to get low on distilled water. Check them 1x/month or so until you learn their personality. |
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* overvoltage | * overvoltage |
* Incorrect Absorption setpoints. AGM is commonly Absorped at <= 14.4v while FLA is commonly Absorped higher (at 14.7v-14.8v). Check your manufacturer's recommendation and do not exceed it. Overvoltage causes irrepairable damage by outgassing, and AGM cannot be topped off again like FLA. | * Incorrect Absorption setpoints. AGM is commonly Absorped at <= 14.4v while FLA is commonly Absorped higher (at 14.7v-14.8v). Check your manufacturer's recommendation and do not exceed it. Overvoltage causes irrepairable damage by outgassing, and AGM cannot be topped off again like FLA. |
* Equalization. **Do not equalize AGM**!((lifeline excepted)). | * Equalization. **Do not equalize AGM**!((lifeline excepted)). |
| * Low current charging. Cheap AGM require [[electrical:12v:battery_capacity|C/5]] current minimum in Bulk, and expensive ones require C/3. |
* the lead-acid list above | * the lead-acid list above |
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