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opinion:frater_secessus:lifepo4_charging_voltage [2023/06/28 23:30] frater_secessus [why lower-voltage charging works] |
opinion:frater_secessus:lifepo4_charging_voltage [2023/07/22 00:09] frater_secessus [lack of pseudo-float] |
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DRAFT | DRAFT | ||
- | ====== Problems caused by excessive | + | ====== Problems caused by lithium charging profiles ====== |
+ | |||
+ | You'd think that a " | ||
+ | ===== 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 will cause the symptoms to improve or disappear. | If this is the problem then reducing the charging voltage will cause the symptoms to improve or disappear. | ||
[[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 symptoms do clear up you can start to raise the charging voltage back up gradually (13.65v, 13.7v, 13.75v, etc) or you can leave it low. {note from secessus: | + | - if symptoms do clear up you can start to raise the charging voltage back up gradually (13.65v, 13.7v, 13.75v, etc) or you can leave it low if you are getting enough charge. {note from secessus: |
- 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 | ||
- | ==== why lower-voltage charging works ==== | + | === why lower-voltage charging works === |
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* 13.4v will // | * 13.4v will // | ||
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- | + | ==== why the problem occurs ==== | |
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- | ===== why the problem occurs | + | |
{{ https:// | {{ https:// | ||
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- | ===== further reading | + | ==== further reading ==== |
* [[electrical: | * [[electrical: | ||
+ | |||
+ | |||
+ | ===== lack of pseudo-float ===== | ||
+ | |||
+ | So your charge controller isn't charging even though battery state of charge is dropping? | ||
+ | |||
+ | This can be intentional behavior, caused by a Li profile that | ||
+ | |||
+ | - charges to a high voltage (see above) | ||
+ | - then allows the battery to discharge until it hits the [[electrical: | ||
+ | - at which point it charges to the high voltage again | ||
+ | |||
+ | During the discharge stage the controller will appear to stop working. | ||
+ | |||
+ | To avoid this problem. configure a " | ||