I tried asking this question in another thread but I think I got a little too wordy and probably confused the issue so I didn’t get any replies. I’m going to try again and hopefully be a little more succinct
I’m using a Renogy 30 amp DC-DC/MPPT charge controller to charge my SOK 206 AH Lifepo4. The “lithium” setting on the controller bulk charges fine, but when it hits the boost setting it seems to hold the battery at 14.6v indefinitely and stay in “boost”. The charging amps drop to zero/near zero, but the battery doesn’t ever drop down to the usual 13.8ish resting voltage. Is the a problem? It doesn’t seem that the controller is trying to cram more voltage into the battery, but I’m not used to seeing my battery sit at 14.6v all day either (coming from AGM batteries so still learning about lifepo4 charging) This happens when my camper is sitting outside in the sun while not being used. When I apply a load to the battery it rapidly drops to 13.7v or so and the charger returns to a bulk charging mode. Am I damaging my battery by letting it sit at 14.6v for an extended period of time? I can pull the fuse on the solar and stop the charging (which returns the battery to a normal resting voltage of 13.8v), but I don’t want to have to mess with this every time I let my camper sit idle in the sun for a few days.
In case you were going to suggest it, the “user” defined custom settings have the same effect even when I set them to stop “boosting” the battery after the recommended (per manufacturer) 15 minutes. Thanks for any advice!
I’m using a Renogy 30 amp DC-DC/MPPT charge controller to charge my SOK 206 AH Lifepo4. The “lithium” setting on the controller bulk charges fine, but when it hits the boost setting it seems to hold the battery at 14.6v indefinitely and stay in “boost”. The charging amps drop to zero/near zero, but the battery doesn’t ever drop down to the usual 13.8ish resting voltage. Is the a problem? It doesn’t seem that the controller is trying to cram more voltage into the battery, but I’m not used to seeing my battery sit at 14.6v all day either (coming from AGM batteries so still learning about lifepo4 charging) This happens when my camper is sitting outside in the sun while not being used. When I apply a load to the battery it rapidly drops to 13.7v or so and the charger returns to a bulk charging mode. Am I damaging my battery by letting it sit at 14.6v for an extended period of time? I can pull the fuse on the solar and stop the charging (which returns the battery to a normal resting voltage of 13.8v), but I don’t want to have to mess with this every time I let my camper sit idle in the sun for a few days.
In case you were going to suggest it, the “user” defined custom settings have the same effect even when I set them to stop “boosting” the battery after the recommended (per manufacturer) 15 minutes. Thanks for any advice!