This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
opinion:frater_secessus:lifepo4_charging_voltage [2023/06/28 23:30] frater_secessus [why lower-voltage charging works] |
opinion:frater_secessus:lifepo4_charging_voltage [2023/07/21 23:11] frater_secessus [Problems caused by excessive LiFePO4 charging voltage] |
||
---|---|---|---|
Line 1: | Line 1: | ||
DRAFT | DRAFT | ||
- | ====== Problems caused by excessive | + | ====== Problems caused by lithium charging profiles ====== |
+ | |||
+ | |||
+ | ===== excessive charging voltage ===== | ||
[[https:// | [[https:// | ||
Line 11: | Line 14: | ||
* 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 |
Line 24: | Line 27: | ||
- 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 | ||
Line 30: | Line 33: | ||
- | LiFePO4 will fully charge at voltages as low as the mid-13s, | + | LiFePO4 will fully charge at voltages as low as the mid-13s, |
* ≥14.0v will charge to 100% SoC with zero minutes of absorption durations: hit the voltage setpoint and //stop//. Cell voltages tend to diverge as charging voltage increases above 14.0v because they are further up the knee (see below) | * ≥14.0v will charge to 100% SoC with zero minutes of absorption durations: hit the voltage setpoint and //stop//. Cell voltages tend to diverge as charging voltage increases above 14.0v because they are further up the knee (see below) |