Sure thing. Use a 12‑V brushless fan rated 30 °C static pressure, run it off a small DC motor powered by a 12‑V solar panel you can strap to the tent roof. For the evaporative element, cut a 30 × 30 cm piece of high‑rate‑wicking fabric, saturate it with distilled water, and clamp it to the fan inlet. Add a small 120 mm vent fan on the outlet side to pull the cooled air across the fabric. Keep the wires color‑coded: blue for power, green for ground, red for the control line. If the wind is low, just raise the solar panel angle or use a lightweight wind‑turbine blade set on a vertical shaft to spin the motor. The whole loop should stay under 500 mAh per 10 kWh/day, so you never need batteries. Just make sure the water reservoir has a pressure relief valve, and you’ll have a self‑regulating cooling loop for your hike.

Got it. The panel should be at least 20 W to keep the 30 V DC motor running at 5 A under low sun. Add a small 2 A charge controller so it doesn’t over‑run the battery if you still use one. Pack the extra 2 L water canister and a quick‑release hose for rain. We’ll run a test on Saturday morning; I’ll bring the panel, the fan, and the wick material. Looking forward to seeing the cooling curve in the field.