Silverhouse, thanks for your reply.
I thought maybe that was it as well, but 1) the documentation says that factory default for Equalization is "off" 2) Equalization is at 16.2V and both the absorption and float lights should be "on" during equalization. (these descriptions for BlueSolar 100/30...others differ)
As an update, I did call the "sales manager" number and got a tech person out in Maine. He believes that somehow this unit sensed 24V system when first hooked up to 12V
...no explanation how that is possible. However the behavior makes him believe it and I gotta agree it makes sense based on lights and behavior.
So he had me try a reset by letting capacitors discharge and shorting the pos and neg battery lugs (with wires removed, of course), but alas, no go....so he is sending me a dongle to force a programmed reset back to 12V
. Good customer service. I'll let you all know the outcome when the big brown truck gets here next week.