Group Member Joel Bean tells us this:
“Findings about Kisae controller. Although the manual discusses the status lights on the Kisae, you will only see two states.
ON and charging (solid green on bottom, flashing amber on top) and/or
OFF (both solid red).
Ignore the information about Constant Current, Constant Charge, and Constant Float. The Kisae does not control/monitor the state of the battery. Battery management for the Volta system does this and simply turns the Kisae on and off. Also, be advised that, although there is function in the Kisae to control charging from an alternator, these connection terminals are not used. This is also controlled by Volta battery management. I hope this addresses some confusion about the use of the Kisae controller. You will always see double red lights until the battery is below about 90%. One exception. If the Kisae starts charging the battery, it will continue until full. Once full, it will shut off, all red, and not resume unless the battery dips to below 90 or 91%, when Volta battery management turns it on again.”
Also note: The lights turn off completely at night (when there is no solar energy on the solar panels at all).