@iand Did you get yours resolved? I’m fighting a similar problem on my boat and posted about it. I am convinced there is a fight between the Quattro, BMV and the dumb (internal) BMS on the battery causing things to never reach ‘fully charged’ to trigger the sustain mode and instead Quattro sits in float mode forever trying to charge my batteries instead of letting solar do it. I posted about it here in case you want to read my experience and have any comments/suggestions… Solar Priority Mode not ignoring shore power to prioritize use of solar on a boat - #3 by drklain
drklain
(Dave Klain)
36
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