I have an ip22 12/30 charging a pair of 100ah battle born lifepo4 batteries. It will charge for a couple minutes at 30amp but then drops to 18.2ish amps and stays there till absorption. I have tried the lipo preset and I have tried custom with the absorption voltage at 14.4 (per Battleborn) and turning off battery safe. I have tried it with and without my built-in RV converter adding 10amp of its own. What else am I missing that is causing it to drop down to 18amp from 30?