Model S Battery Coolant

[GyroGypsy]

I don't know what forum best matches this, but the admin can move if needed.

I am installing two used Model S batteries into an RV solar system. They are installed in an insulated battery box. These had a little blue Tesla cooling fluid in them as I added water to my initial heating system for testing. All went well until i flushed the system with water, and then added pink Zerex 50/50 antifreeze. Flow has diminished such that I am now concerned about maintaining a 70F battery temperature in cold weather.

I found no cautions about using this fluid. I am looking for any guidance on what to do next. I will try going back to plain water and see if just antifreeze viscosity is the blame.

Thanks in advance.

 

[arnis]

Mistake 1) never use "regular water"
Mistake 2) do not use different glycol
Mistake 3) plan to repeat Mistake 1.

You can flush the system with distilled water as step 1.
Next is to get the correct coolant (doesn't have to be OEM) and dilute it accordingly (with distilled water).

 

[GyroGypsy]

I used distilled water. I have been unable to find out who makes the fluid, its specs, nor much less where to purchase it. Can you help?

 

[arnis]

Version 1.0.9 of model_s_owners_manual_europe.pdf page 7.16 specifies G-48 ethylene-glycol coolant (HOAT)

G48 - Glysantin Coolant | Valvoline Europe
Valvoline™ Zerex™ G-48 : Product Catalog - Valvoline

you just need to google tesla coolant. Took 2 minutes

 

[kelskein]

Mistake 1) never use "regular water"
Mistake liteblue 2) do not use different glycol
Mistake 3) plan to repeat Mistake 1.

You can flush the system with distilled water as step 1.
Next is to get the correct coolant (doesn't have to be OEM) and dilute it accordingly (with distilled water).

Pretty cool meme. Awesome.