Hi, I have a Bluetooth en-70 and lately sometimes it gives a red TEMP led and it doesn’t charge.
It is in a van in Spain and certainly it’s hot here, I don’t know how much exactly but it’s warm. Anyway I don’t think it’s more than 40ºc.
It appears normally after cooking a pizza and stay with 800w output around ten minutes. I disconnect even the charging during this process and happens the same.
I checked and it gives error e007 but I don’t know what it means.
I charge it with a solar plate so I need to charge by day. And this it’s becoming a problem.
What should I do?
Thanks
Hi Javik, I live in one of the hottest places on the planet, Australia. When it is around 40C ambient air temperature, an enclosed vehicle can rise to near 60C. This is way over most LFP batteries safe charge or discharge operating temperatures. I know this as I have 12V compressor fridge with a sensor in the fridge and the gauge is dual zone, also showing the temperature inside the vehicle.
All I can offer is park your vehicle in shade, open windows or doors and even run the vehicle air conditioner if fitted.
This is true - there are places here that ambient is over 50 deg C in summer and you can fry an egg on the hood of the car.
2 Likes
Hi @Javik, It seems you mentioned the EB70, is that correct?
E007 indicates overall battery over-temperature protection.
Thank you for @Mandp’s explanation. Yes, when the ambient temperature is high, the temperature inside an enclosed vehicle compartment will be even higher.
Additionally, the internal temperature of the continuously operating battery can rise even further, thus triggering the over-temperature protection.
We would like to know if there is air conditioning in your truck. Alternatively, would it help to turn off the unit, place it in a ventilated and cool area until the temperature drops, and then test again?
Parking in shade helps. Parking away from Sun also helps. The reason why the inside of vehicle get very hot is the radiant heat from Sun. Mostly your windshield and other materials traps the infrared heat inside. The longform infrared radiant heat that is generated is unable to escape for the most part. Using common sense you would think opening the windows will provide ventilation and keep the interior cool, however this will only provide temporary relief of trapped heat. Once the stale (non-moving air) reaches thermal equilibrium a car with “opened windows” will be the same temperature as the one with closed windows. See: https://www.youtube.com/watch?v=WUp_kq7DXSc However, it will “slow” the build up of heat for a minimal amount of time. Cracking your windows would be more beneficial if you are doing a short grocery haul (less than 45 mins) and plan to go right back inside your car again and drive away/run the AC afterwards. If you are headed to work and will be inside for 8+ hours, all cracking a window open does is invite theft.
The trick: You have to move the air. Simply roll down your passenger window. Open your driver door and swing it open and close about 8-10 times. This creates a pressure differential which pushes the hot air out of the car. Hot air rises so mostly it escapes through the top portion of the window. https://www.youtube.com/shorts/vKmZNEWSvHA