.The following is a description as to what is going on. I will try to keep this as short as possible:
Replaced Lifeline AGM 100 amp hour battery bank with same 5 batteries so 500 amp hour
Also purchased Dongles and attached to 2 only 100/30 MPPT controllers which are supplied by 2 only 350 watt panels.
Lifeline recommends 13.25 float voltage which wouldn't work as was told in previous post that it needs to be higher, suggested 13.5 Lifeline say's overcharging, bad for batteries.
Lifeline also recommended using a fixed absorption time of around 2.5hrs with controllers going into float when batteries accepting 2.5amps. Set up fixed time and it seemed to work for awhile but after some time when checking app history absorption time had inexplicably climbed to near 5hrs.
Reset to adaptive and somewhere in the process set up temperature compensation at Lifeline recommended 14.27 and enabled temperature compensation
Maximum voltage on history dropped to around 14.08, absorption time dropped to near 30 minutes (Lifeline says batteries not being fully charged) and slowly over days battery monitor SOC percentage would slowly drop down from 100% with a corresponding drop in early morning SOC. Previously on old batteries we would consistently charge on solar to 100% and overnight would drop to around 88%. Original batteries failed suddenly after 4 years near to the day which, based on our charging history surprised Lifeline. Was suggested that early failure was from overcharging at 13.5 float voltage.
2 days ago I reset the parameters back to 14.4 absorption voltage and disabled temperature compensation. I split the difference on the float voltage at 13.35 and it seemed to work yesterday but only got an absorption time of 1hr 29 minutes and it looked like the batteries were still accepting more than the 2.5amps. We are moving today so alternator will do some charging so will continue to monitor once back on only solar charging.
Through this I have tried everything I can think of but cannot get the 2 controllers to network on the app. Uninstalled and re downloaded the app but no connection.
