Riddle me this. The Growatt 6000 offers the standard fare of battery type selections, BUT, the LI selection REQUIRES communication with your battery/BMS to function. Finding a compatible communication cable to pair a Growatt 6000 with a Daly BMS is problematic if not impossible. SO... Growatt offers a unique work around by offering a "special" battery option labeled "US2". The manual states that this is the preferred selection for those who are running LiFe batteries WITHOUT a communication link between the two components. WHY? You have control over the same exact parameters with USE as US2. I'm having some problems getting the Growatt to fully utilize the PV input to charge the battery. It "chokes" in a matter of minutes and simply quits accepting more than a few watts (20 or less) from the panels and sends ZERO of it to the battery even though the battery is well below the overcharge limit specified. Scratching my head and beginning to think the control board in the Growatt is defective. The cells are all balanced. No cell is racing past the charge limit and triggering a block by the BMS. No cell is dragging so low as to trigger a low voltage cutoff. It just arbitrarily quits charging and won't reset to charging until you do a complete battery disconnect and power down the Growatt then restart it. I've read a post where someone was having a similar issue and was advised by a well-known company to disregard the designated preference and set battery type to USE instead of US2 to set the charging parameters. I'll try that tomorrow and report back, but as many threads as I have found reporting charging issues with the Growatt 6000, I'm not holding out a lot of hope. Not excited about replacing $550 dollars worth of internal boards on a Growatt that never functioned properly out of the box, but that's what you get when you buy your components a few at a time, as you can afford them, and don't get around to assembling the system until all of your warranty time has passed.