Hi, im reasonably new to solar, but have
Renogy 200W Panel (2nd coming)
Victron Smart Solar 100/30 (fw 1.6.3)
Litime 12v 100AH Lifepo4 Battery
Renogy 2000W inverter (wasnt even powered on or any load at the time)
(the charge controller is connected to the battery by Renogy 10AWG Copper wire) all connections are secure/checked
I did a fair bit of reading and watching youtube vids and had a basic grasp, so initially i set the smart solar to rotary postiton 7 (victron default of 14.2v absorb 13.5v float)
Now my first charge was all going fine, Bulk got it up to 14.2V and triggered to Absorb, but then after a few seconds of being stable at 14.2, it started spiking to 16-17v, then back down to about 13.8, then back up to 16/17v and repeated like a seesaw I left for 5 mins but it didnt show any signs of stopping, so i disabled the charger, the battery voltage measured on a meter was at around 13.8v but slowly dropped off over the next 20minutes.
re-enabled the charger and it went to bulk brifly, then absorb and the same issue with the spiking
I reached out to litime and confirmed settings, they said the settings i was using were OK, but that they actually reccommended higher voltages!
14.4v absorb & 13.8v float
so i changed the settings to life po4 preset, and adjusted the voltages, but exactly the same!
by this time the sun was going down, i switched on the inverter and made use of the power overnight, all good!
Next day Same happened at Absorb, so i disabled charger
Next day I set down at 14v absorb, 13.5 float.... same issue!
now ive reached out to both victron support (who got me in touch with the seller of the item) and also still in talks with litime, but so far zero real answers
I dont have a second battery or charge controller to test or swap out to figure out which device is the issue? at first i though the battery.... but then why is charging bulk stable up to 14v, 14.2v, 14.4v yet the second it switches to absorb on any voltage, the spikes start?
(even tested as low as 13.8v on absorb and spikes)
(is it possible my victron has some issue with its absorb mode?) im guessing some spike trips the BMS on the battery and just keeps repeating
out of ideas and not sure which to return, the controller, the battery or BOTH
p.s last night i noticed the smartsolar android app updated and the firmware to 1.6.4, so currently today its charging up (slowly as cloudy) on the new firmware, but not holding out any hope.
thanks!