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--- opinion:frater_secessus:lifepo4_charging_voltage [2023/06/28 23:31]
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]
@@ Line 1: / Line 1: @@
 DRAFT
-====== Problems caused by excessive LiFePO4 charging voltage ======
+====== Problems caused by lithium charging profiles ======
+===== excessive charging voltage =====
 [[https://img.mousetrap.net/misc/toohigh.jpg|{{ https://img.mousetrap.net/misc/thumbs/toohigh.jpg}}]]
@@ Line 24: / Line 27: @@
   - reduce charging voltage (aka "absorption voltage", "boost voltage") to something like 13.6v.  Float if used, can be set to something like 13.3v-13.4v.  You may have to use a USER profile instead of a canned LITHIUM profile to make these changes.((note that the LITHIUM profile may have protections that others do not.  Low temp charge disconnect, for example.  Read the docs for your charger.))  If you choose to modify the Li profile itself take a pic or notes of the original settings so you know what they were and can return to them later if desired.((If a configuraable profile is not available the gentlest canned profile is often GEL, which will charge at ~14.2v.  Not great, but better than 14.4v or 14.6v.))
   - observe for a few days.  Charging will be slower and may not finish by sundown((you may have to define or increase an Absorption/boost duration)); we want to see if it can keep on charging rather than trigger BMS cutoff.
-  - 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:  there is little benefit to charging LiFePO4 >13.8v.]  Float can remain low at 13.3v-13.4v.
+  - 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:  there is little benefit to charging LiFePO4 >13.8v.]  Float can remain low at 13.3v-13.4v.
   - if it starts acting up again drop charging voltage back down a notch or two

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