Is EPEVER MPPT solar charge controller capable of low temp shut off?

Jamie.sanders

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Dec 1, 2019
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99
I'm new but saw an interesting trick, your inverter has heat sinks on it because it produces heat, mount it below the batteries
to help keep the batteries from freezing, add a small box or plexiglass cover or something to help hold that heat in.
 

Tecnodave

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Mar 22, 2021
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549
Im currently using flooded lead acid batteries so no way am i going to put my electronics anywhere near that, the batteries are in a commercial laundry cart and separated from my power shack. I have a homestead and cabin in Alaska but i reside in sunny coastal California where i've seen snow only once in 30 plus years living in the Santa Cruz Mountains not more than a few miles from the big pond.......The Pacific Ocean...my problem is with excessive heat in the summer. My place in Alaska is only occupied in better weather and i bring up fresh batteries every trip and trade them away when i leave, no winter storage problems at all.
 

Banszi

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Nov 9, 2020
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Location
Warsaw, Poland
I can confirm that my Epever Triron 40a Mppt does have a programmable low temp cut off that does work (tested using frozen salt water). I'm using the external temp sensor.
I'm very happy with this unit. I use the rs485 port to connect to Arduino. Works great.
 

Andy6ft4Tall

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Jul 21, 2021
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Can the Epever temperature setting be accessed using the phone App? Or does it need to be connected to a PC?
 

Jwcarter

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Sep 3, 2021
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OP: I have that exact same charge controller and just confirmed that the software setting stick once the MT-50 is plugged back in after setting the low-temp cutoff via usb cable. I don’t have pv connected so I can’t confirm fully but it looks promising.
 

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interestingfellow

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Aug 5, 2020
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57
It certainly seems to behave like a cutoff. My testing procedure involves the following settings;

View attachment 56344 View attachment 56345

Then I confirm it's charging;

View attachment 56340

Then I stick the temperature probe in a thermos with ice and salt to bring the temperature below freezing;

View attachment 56342

At which point the controller and my bench power supply seem to agree that it's not charging from the solar input. (The controller says "Solar Status=Cut Out", "Charging Status=Not Charging", "Battery Current(A)=0.00", and "Battery Status=Under Min Temp." while the bench power supply drops to a negligible amperage draw.)

Here's a recording of that all happening; (Just the software side, since my desk is too chaotic right now to include in an actual video.)

View attachment 56346
I want to make sure that I understand.
IN "device parameter settings" it has -40 listed as lower limit. *This is for discharge AND NOT what I need to change?
In "control parameter" panel, it has "libattery protection" enabled <*THIS* is the setting that does the protecting?

Thank you!
 

Symbioquine

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Jul 6, 2021
Messages
97
There has been a recent firmware update to Epever charge controllers


I saw that PDF before, but do you know where one can actually download the update and updater program?
 
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