The Promariner ProNautic / Sterling Pro Charge look to have a nice feature set and temperature compensation but seems to completely lack advanced control or user control of ending amps / exit amps for the transition from absorption to float - just my opinion.
This complaint - ProNautic / Sterling 1240P Charger issue - Cruisers & Sailing Forums
- says it exits very high, sometime at 20 or 22 amps! The battery is nowhere near charged. That's almost 10 times higher than what Lifeline recommends for example. (460Ah battery bank x 0.5% = 2.3A)
That causes the the end user to physically have to monitor the charge process and restart it etc.
The fix suggested here - ProNautic / Sterling 1240P Charger issue - Cruisers & Sailing Forums
- again means that the end user is very much involved in the process and has to watch the current flow and stop the unit and reprogram when they're satisfied that the battery is charged.
The Lifeline battery manual recommends exit absorb when the current has dropped to 0.5% of the battery's capacity. That is 1/2 an amp on a 100Ah battery (0.5A).
Hopefully Sehc will share the charger capacity, battery capacity and ending amps or exit amps and he's observed if relying on automatic charging. Maybe there's a way match battery bank size with charger size to get the Promariner ProNautic / Sterling Pro Charge to exit the absorption stage at the current the battery manufacturer recommends.