Lifepo4 heater solution

[Sonnyboy]

I am looking for a solution to this problem: 2 100ah lifepo4 weize batteries, 800w solar on roof of shed. In the gloomy New England winter, my agm backup battery lasts way longer due to no charge cut off. I am looking to install a heater pad under the lifepo4 batteries but only want to have it power on when the lifepo4 batts can charge, during sunlight.
Proposed Solution: I have a 20w panel that powers a fan in the summer. I would like to use that panel in the winter to charge my agm battery through a separate Epever charge controller. So the heating solution will be separate from the other system. I will run a timer(https://www.walmart.com/ip/Timer-Sw...7?wmlspartner=wlpa&selectedSellerId=101252734) from the battery not an Inkbird temp controller and then into the heating pad. Does that sound right to you? How would you fuse it?

 

[sunshine_eggo]

LifePO4 heater pads

I am in Vermont and want to add heating pads to my battery box in a shed that powers a small freezer. I’ve read a few threads on what people have done but none that have the heater pads turn on by timer or sunlight. If the panels are not getting any sunlight, I don’t want to waste battery...

diysolarforum.com

 

[wpns]

Sounds like you need a diverter to run the heaters from the panels when your battery temperature is too low, then when the batteries warm up it switches to charging the batteries.

 

[sunshine_eggo]

IMHO, they need to not start a new thread.

 

[Sonnyboy]

IMHO, they need to not start a new thread.

How do I delete?

 

[Sonnyboy]

Sounds like you need a diverter to run the heaters from the panels when your battery temperature is too low, then when the batteries warm up it switches to charging the batteries.

That sounds interesting. Do you use one, if so which one? Thanks!

 

[chrisski]

How do I delete?

If you want to delete the thread, click the report button and in the reason say why you want it deleted. A mod will see this and decide what to do.