Common mistakes

Buying A/C first

Without external shading, cab treatment and air distribution, the unit works harder while occupants still sit in ahot zone.

Confusing fans with refrigeration

Fans move air and improve comfort; they cannot make interior air colder than outdoor air. Exhaust fans activelyremove conditioned air when A/C is running.

Ignoring the DC side

Long undersized cable, weak connector or wrong fuse wastes energy and can overheat. Shortening cable onlyhelps when the whole path is correctly engineered.

Designing to one perfect day

Shade, full batteries and dry air can hide the worst case. Test full sun, humidity, low SOC, no cellular signal andfailed fan - while occupied and supervised.

System rule

Do not judge a cooling upgrade at the vent. Judge it by the hottest occupied zone, humidity, energy usedand whether the system can recover that energy safely.

CHAPTER CHECK

• I can explain which heat path this step addresses.• I measured its effect at front, middle and rear - not only by touch.• I added its power, failure mode, maintenance and safety action to the system plan.