Will's video review (Easy Solar Power for #vanlife and Off-grid RV Dwellers: Renogy DC to DC Charger w/ MPPT) shows the current through the DCC50S dropping to 8 amps at 9:27 into the video. Will talks about the current dying as the two batteries equalize, which implies that the DCC50S is just a buck converter and not a buck-boost converter. The Victron Buck-Boost DC-DC converter and the Sterling BB1260 won't stop charging when the two batteries are equalized, and if the input voltage drops below the output voltage, they'll move from bucking to boosting until a minimum input voltage is reached. Maybe the current dropped in Will's video because the charger stopped bulk charging and it wasn't because the two batteries were equalized in voltage? Anyways, does anybody know if the Renogy DCC50S will continue to charge if the input voltage drops below the output voltage (i.e., buck-boost converter)? If it doesn't boost, then it won't be much good with the new smart alternators where the input voltage needs to be routinely boosted to charge the coach battery.