The LESsolar system doesn't replace your central air conditioner. It takes over most of the daytime cooling, at a much higher efficiency, and lets your existing ducts carry that cool air to every room.
An air conditioner's SEER rating tells you how much cooling it delivers for each unit of electricity. The higher the number, the less you pay for the same comfort. Many Arizona homes still run central systems rated 10 to 14 SEER. The LESsolar mini split is rated SEER 24.
Compared with a 10 SEER system, the mini split uses less than half the electricity to make the same cooling. Every hour it carries the load instead of your central unit, you save, whether it's running on the sun or the grid.
With solar panels, the hours of strongest sun, when your home needs cooling the most, are covered by power from your own roof.
Your central compressor starts and runs less often. That means lower bills and a longer life for the equipment you already own.
The system's efficiency is AHRI Certified (SEER2 21.0, reference no. 216021340), so the rating is independently tested, not just claimed.
Your central fan uses some electricity while it circulates air. An older standard blower motor uses more than a newer variable-speed motor. We'll look at your equipment and recommend the best fan setting for your home.
In Arizona, the first worry in a summer outage is heat. With solar panels wired directly to the air conditioner, the LESsolar system keeps cooling on sunshine alone while the grid is down. No generator to start, no batteries to manage, no fuel to store.
During an outage the central fan has no power, so cooling stays in the area where the mini split is mounted. That's why we place it in the main living space: it becomes the cool room the family can gather in. Solar-only cooling stops after sunset.
| Standby generator sized to run central AC | LESsolar Grid + Solar package | |
|---|---|---|
| Installed cost | $9,500 to $24,000 (22 to 25 kW) | $7,500 |
| Yearly upkeep | About $200 to $600 in service | No engine to service |
| Fuel | Natural gas or propane while it runs | Sunlight |
| Extra equipment | Transfer switch, gas line, concrete pad | None |
| Permit and inspection | Required | Not required |
| Lowers your monthly bill | No. It sits idle until an outage | Yes, every sunny day |
Generator figures are typical 2025–2026 installed prices for 22 to 25 kW home standby units, including transfer switch, gas line, pad, and permit (ThePricer). Your quote will vary.
See what the system could save on your electric bill, or get a quote for your home.