Programming SOK 206AH lithium battery with MT50

navillus

New Member
Joined
Feb 11, 2021
Messages
55
As anyone successfully input the SOK parameters into the epever 40 amp solar charge controller (using the MT50)? I received the instructions from SOK, and several changes give a "param error" message. These are what I received:

How to set on EPEVER Solar Charge Controller


Select the “User” battery type.
Press the “ENTER” button and hold 5s under the battery voltage interface.
Press the “SELECT” button when the battery type interface is flashing.
Press the “ENTER” button to confirm the battery type.
Over Voltage Disconnect 14.7 V
Charging Limit Voltage 14.6 V
Over Voltage Reconnect 14.6 V
Equalize Charging Voltage shut off or 14.4 V
Boost Charging Voltage 14.6 V
Float Charging Voltage 13.6 V
Boost Reconnect 13.3 V
Low Voltage Reconnect 10
Under Voltage Warning Reconnect Voltage 11.5
Under Voltage Warning 11.5
Low Voltage Disconnect 11.0
Discharging Limit Voltage 10.5
Equalize Duration 0
Boost Duration 180 minutes

Hopefully, someone out there has overcome this problem.
 

navillus

New Member
Joined
Feb 11, 2021
Messages
55
See here :


Those settings should be fine for SOK.
I actually found this video last night and matched the changes (there are only a few). I am a little confused why SOK requires so many parameter changes that are not necessary?
 

robert540

New Member
Joined
Sep 5, 2021
Messages
4
As anyone successfully input the SOK parameters into the epever 40 amp solar charge controller (using the MT50)? I received the instructions from SOK, and several changes give a "param error" message. These are what I received:

How to set on EPEVER Solar Charge Controller


Select the “User” battery type.
Press the “ENTER” button and hold 5s under the battery voltage interface.
Press the “SELECT” button when the battery type interface is flashing.
Press the “ENTER” button to confirm the battery type.
Over Voltage Disconnect 14.7 V
Charging Limit Voltage 14.6 V
Over Voltage Reconnect 14.6 V
Equalize Charging Voltage shut off or 14.4 V
Boost Charging Voltage 14.6 V
Float Charging Voltage 13.6 V
Boost Reconnect 13.3 V
Low Voltage Reconnect 10
Under Voltage Warning Reconnect Voltage 11.5
Under Voltage Warning 11.5
Low Voltage Disconnect 11.0
Discharging Limit Voltage 10.5
Equalize Duration 0
Boost Duration 180 minutes

Hopefully, someone out there has overcome this problem.
Thank you for posting this information. I also have two SOK 206AH batteries under my Roadtrek RV where the overnight Pennsylvania temps dip into the 20's (F). I also use the MT-50 monitor with the Epever 4210AN SCC. Until today, I was running with the SEALED default settings, and everything seemed to be working ok, but as the temps dropped, my concern about having a perfect configuration increased. I had not seen Will's video on configuring a 100AH Battleborn battery until today, and it was very helpful because I was previously not able to get the MT-50 to navigate, edit, and save the settings because I found the Epever instructions a bit too vague. I was doing it wrong, but now I think I have finally mastered the process! When I installed the SOK batteries in September 2021, I added a Victron 30 amp DC to DC controller in the rear of the Roadtrek with one of the SOK batteries. The Victron controller gets power from the factory installed battery separator switch when the RV is operated. Unlike the factory configuration, when the RV is parked, no power from the solar panels can now help charge the Chevy battery because the Victron DC to DC charger is a one-way device. To keep the Chevy battery charged, I added a small 30 amp Sunner Power 24 x 14 inch 12 volt solar panel to the roof (from Amazon) that came with an attached weatherproof MPPT controller and connected it to the Chevy battery side of the Battery Separator switch. So far, this has kept the Chevy battery charged better than a plug in trickle charger. The same company also makes a 50 amp kit for automotive charging.
 

robert540

New Member
Joined
Sep 5, 2021
Messages
4
Thank you for posting this information. I also have two SOK 206AH batteries under my Roadtrek RV where the overnight Pennsylvania temps dip into the 20's (F). I also use the MT-50 monitor with the Epever 4210AN SCC. Until today, I was running with the SEALED default settings, and everything seemed to be working ok, but as the temps dropped, my concern about having a perfect configuration increased. I had not seen Will's video on configuring a 100AH Battleborn battery until today, and it was very helpful because I was previously not able to get the MT-50 to navigate, edit, and save the settings because I found the Epever instructions a bit too vague. I was doing it wrong, but now I think I have finally mastered the process! When I installed the SOK batteries in September 2021, I added a Victron 30 amp DC to DC controller in the rear of the Roadtrek with one of the SOK batteries. The Victron controller gets power from the factory installed battery separator switch when the RV is operated. Unlike the factory configuration, when the RV is parked, no power from the solar panels can now help charge the Chevy battery because the Victron DC to DC charger is a one-way device. To keep the Chevy battery charged, I added a small 30 amp Sunner Power 24 x 14 inch 12 volt solar panel to the roof (from Amazon) that came with an attached weatherproof MPPT controller and connected it to the Chevy battery side of the Battery Separator switch. So far, this has kept the Chevy battery charged better than a plug in trickle charger. The same company also makes a 50 amp kit for automotive charging.
To avoid the Parameter Errors, I set the Over Voltage Disconnect to 15.3 V, the Low Voltage Reconnect to 11.3 V, the Under Voltage Warning Reconnect Voltage to 12.2 V, and left the Boost Duration at the default 120 minutes. The MT-50 accepted and saved these and the other settings recommended by SOK.
 
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