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opinion:frater_secessus:lifepo4_charging_voltage [2023/06/28 23:16] frater_secessus [Problems caused by excessive LiFePO4 charging voltage] |
opinion:frater_secessus:lifepo4_charging_voltage [2023/07/21 23:11] frater_secessus [Problems caused by excessive LiFePO4 charging voltage] |
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- | ====== Problems caused by excessive | + | ====== Problems caused by lithium charging profiles ====== |
+ | |||
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+ | ===== excessive charging voltage ===== | ||
[[https:// | [[https:// | ||
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* voltages in the system are spiking, perhaps tripping your inverter | * voltages in the system are spiking, perhaps tripping your inverter | ||
- | It's fairly common for **excessive charging voltage** to cause these symptoms. | + | It's fairly common for **excessive charging voltage** to indirectly |
===== TLDR ===== | ===== TLDR ===== | ||
- | If this is the problem then reducing the charging voltage | + | If this is the problem then reducing the charging voltage will cause the symptoms to improve |
- | [[[opinion: | + | [[opinion: |
===== the full process ===== | ===== the full process ===== | ||
- | - reduce charging voltage (aka " | + | - reduce charging voltage (aka " |
- | - observe for a few days. Charging will be slower and may not finish by sundown((you may have to define or increase an Absorption/ | + | - observe for a few days. Charging will be slower and may not finish by sundown((you may have to define or increase an Absorption/ |
- | - if they do clear up you can start to raise the charging voltage back up gradually (13.65v, 13.7v, 13.74v, etc) or you can leave it low. {note from secessus: | + | - if symptoms |
- if it starts acting up again drop charging voltage back down a notch or two | - if it starts acting up again drop charging voltage back down a notch or two | ||
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- | LiFePO4 will fully charge at voltages as low as the mid-13s, but it will take more time at lower voltages; | + | LiFePO4 will fully charge at voltages as low as the mid-13s, |
- | * ≥14.0v will charge to 100% SoC with zero absorption: hit the voltage setpoint and //stop//. Cell voltages tend to diverge as charging voltage increases. | + | * ≥14.0v will charge to 100% SoC with zero minutes of absorption |
- | * 13.8v will charge to 100% SoC with token Absorption (10-30 minutes) and cells tend to stay in balance. | + | * 13.8v will charge to 100% SoC with a small amount of Absorption (10-30 minutes?) and cells tend to stay in balance. |
* 13.6v will charge to 100% SoC with several hours of Absorption | * 13.6v will charge to 100% SoC with several hours of Absorption | ||
- | * 13.4v will // | + | * 13.4v will // |
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