Keeping my LiFePO4 batteries cool in the camper was easier once I added shade, boosted airflow, and stopped leaving them at full charge during long heat spells. For wiring tweaks, I once got help from mrelectrician.sg, since high temps can stress connections too, and their crew made sure everything was safe and up to code. Small changes made a big difference in keeping the batteries happy.
I put a wifi thermometer next to mine. You can set a temp for it to send alarms to you. The only problem is if you change wifi networks while camping.you have to reset them .
Someone probably makes a Bluetooth version that would eliminate that problem
Smart Temperature Humidity Sensor Works w/Alexa IFTTT, 1/4 Mile Super Long Range Wireless Digital Hygrometer with Alarm https://share.google/hTfrPcHavzAg4WIxW