Solar powered heat pumping

This project was intending to make use of the 19911-5L31-15CQ TECs for pumping heat out of a yurt at Burning Man. Unfortunately, I spent all of my time trying to finish my art installation and was unable to finish this in time for the burn, but am still making progress for the handful of hot SF days.

The system consists of two water loops, hot & cold, which run through two small PC liquid cooling radiators and 120mm 12V computer case fans. I found the copper water blocks and a couple of 12V water pumps with reservoir on Ali Express. The water blocks sandwich the TECs on either side and are held in place with compression plates printed from PLA. I need to calculate the amount of torque on the screws required to achieve the proper pressure on the TECs.

The power system consists of 2x 100W Renology solar panels and charge controller with a 66 Ah 12V battery. Running the system at a lower power than the rated max of 1860 W will hopefully result in a nice increase in efficiency, but I need to gather more data.