The three efficiency tweaks

Condenser-area shielding

We used leftover reflective insulation around the external A/C cover to reduce direct solar heating. Neverobstruct condenser intake, exhaust, drains or service openings; reflective additions that trap hot discharge willmake performance worse.

Refrigerant-line insulation

We covered accessible coolant/refrigerant lines, including the section through the door, to reduce unwantedheat exchange and protect the line. Use compatible closed-cell insulation and do not hide leaks or rub points.

Shorter power cable

Reducing unnecessary DC cable length lowered resistance/voltage drop. We observed about 5-10% lowerindicated power draw depending on mode after our combined tweaks. Treat this as our system observation, nota universal promise.

Electrical rule

Cable changes require correct ampacity, voltage-drop calculation, fuse placement, lugs and strain relief. Ashorter undersized cable is still unsafe; follow the A/C and battery-system manuals.

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.