3 tons wrote:
“Controllers don't compete.”
A single stage controller mixed with a multi-stage controller can cause the multi-stage controller to prematurely switch to float mode, effectively cutting out that controllers harvest - Sometimes referred to as “dueling controllers”...For clarity, not a theoretical matter, this how it can happen...
3 tons
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Nope!
Say the multi-stage will drop to 13.6 two hours after reaching 14.6 (typical EP Solar fixed profile). Now start off with your single stage set at 14.6 in parallel.
"Prematurely" is only because it gets to 14.6 sooner with both on the job. It is not premature wrt to battery SOC.
Two hours after the batts reach 14.6, the multi will drop to 13.6 but the single stays at 14.6.
Whether this is good or bad "depends"
It is bad if it happens when the battery bank acceptance rate at 14.6 is higher than the rated amps of the single and it is not charged up yet and there is daylight left to go.
It is ok if the single can do it all from then on that day.\
It is even possible that you get it all done with the single at 14.6 in the afternoon, and want to go to float , but the single won't. If you can't crank it down to 13.6, then you have to disconnect it and let the other one carry on at its 13.6 till dark.
