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Controller shows 100% power at only 26.5v

JEH

New Member
Joined
Feb 28, 2021
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6
I have a Bouge 40A charge controller in Lithium 24v mode. What could cause it to show 100% charge at only 26.5 volts? yes I verified with a clamp meter it shows 26.6. It won't charge higher than 26.5. I have a Big Battery 24v 120ah mule with 3 200w panels with voc of 26v and 7.69a in series. I have a another panel to go to 2S2P later.
 
Does the charge controller have a custom 'User' profile to try and set the parameters manual? Does the spec sheet for the controller show what the 'Lithium 24v mode' charging parameters should be? Usually they would publish a chart showing the different voltages for Bulk, Absorption, Float, etc for the various battery profile types. What is your PV Voc coming in?

Have you tried contacting Bouge Support?
 
a bit off topic, but can you access the mule BMS via Bluetooth. The HSKY BMS can be accessed using the XiaoXiang BMSapp
 
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