Hands down this is the cheapest-to-run 3.5kW Window Air Conditioner you can buy.
 
Use it more, pay less: Daytime cooling can cost near-zero when your panels are in full sun — so you can stay cool without the huge energy bills or regrets.
Pays for itself fast: Typical energy savings can offset the purchase in about 7–14 months of everyday use (site-dependent).
True hybrid power (DC & AC): Runs by day on DC solar, auto-balances with 230V AC mains as needed, and switches to AC at night — no separate inverter or batteries required for day time solar mode.
As the sun sets, it just keeps going: Seamlessly transitions from solar to mains so comfort never drops when daylight does.
Sized for real rooms: Up to ~45 m² in favourable conditions (good insulation/shaded)
Quiet, efficient cooling: Runs on ~1kW it's a DC-inverter window unit with low indoor sound (≤56 dB) to keep focus and sleep on track.
Easy panel recipe: Designed for 3 or 4 × 400W–600W solar panels in series (e.g., 3 × 440 W ≈ 1.32 kW). You can oversize up to <1.7 kW PV for stronger sun-hour coverage.
Sips from the grid: With adequate solar power this hybrid unit can pull as little as zero watts from the 230 V AC supply during sunny periods — something standard air conditioners simply can’t do.
Protect weak supplies: An on-board AC-limiting feature tames the energy draw at night or on marginal circuits/generators/off grid systems.
Smart control & insights: On-unit display panel, IR remote, and Wi-Fi app with hour/day/month/year power history — prove your savings.
Planet-friendlier refrigerant: R32 (A2L – lower flammability) with a high-efficiency 0.6 kg charge to reduce run energy and global-warming impact.
Built for Aussie heat: Operates in cooling mode from 0–55 °C outdoor ambient; Dehumidifier mode to 50 °C—great for sheds, pods, etc.
Compact form factor: Fast window install with a slight outward tilt for drainage.
Plug-and-play mains: 230 V, ~7 A via an RCD protected 10 A GPO (general-purpose outlet); no hard-wiring needed in typical installs.
Standards-aligned & solar-rebate friendly: Designed with AS/NZS wiring/PV guidance in mind and panels are eligible for Heat Pump STCs (Small-scale Technology Certificates).
Cleaner air, drier rooms: Integrated filtration helps trap pollen and the unit can dehumidify — comfort that also cuts mould risk.
Lower your footprint: By shifting daytime load to PV you help cut upstream greenhouse gas emissions at the power station.
3-Year Australian warranty when installed by a certified air-conditioner installer, plus local parts and support.
 
What this means for running costs:
In daylight, the compressor and fans are driven primarily and directly from DC solar power. The AC/DC auto-balance feature only sips mains power as needed to maintain performance, so daytime grid use can be minimal to nil when your array is sized correctly and it’s sunny. For protecting off grid batteries or keeping running costs down it's the perfect solution for those uncomfortably hot summers. There's nothing quite like that feeling when you're nice and cool and you know it's not costing you anything to run.
 
Ideal use case locations:
Off-grid cabins and shacks; tiny homes, caravans, studio pods, and open-plan rooms ≤30–45 m²; granny flats and secondary dwellings; rentals where you can’t penetrate walls; home offices; island/weak-grid sites using the 240v AC-limit feature; remote site offices, demountables, and shipping containers; sheds/workshops/garages; coastal/humid regions needing dehumidify + filtration; farm outbuildings to cut genset hours; small retail kiosks/ticket booths; classrooms or clinic rooms in remote communities; emergency/disaster-relief shelters; telecom huts/pump stations/equipment closets; holiday homes; heritage/strata-restricted buildings avoiding outdoor condensers; caravan-park cabins and eco-tourism pods; motor homes, battery-sparing off-grid systems; market stalls/work hubs; any room where solar enables daytime cooling.
 
Quick installer notes:
PV stringing: Series-only; do not parallel strings; keep worst-case cold-day array VOC ≤ 340-350V (>380V will damage the unit, volts rise in the cold).
Array size: 3–4 × 400–600W modules; provide a solar DC isolator/breaker adjacent to the outdoor side of the unit.
AC supply: 230 V, ~7 A via RCD-protected 10 A GPO; dedicated circuit recommended.
Mounting: Use a compliant window support bracket (AS/NZS 5149), maintain a slight outward slope (<3°) for condensate drainage.
Commissioning & app: Run a 30-minute test; Wi-Fi app setup then provides usage and power history by hour/day/month/year.