What a mini split costs to run
Among the 12,000 BTU systems tracked today, the cheapest to buy is Albott DIY 12K Pro Fast-Fit at $550 with a 18 SEER2 rating; the most efficient is TURBRO 12,000 BTU Ductless Mini Split Invert at $650 and 24 SEER2. The efficient one uses 167 fewer kWh a year, which is $31 at the tariff below. Its extra $100 of purchase price takes 3 years to earn back.
Prices retrieved: September 7, 2026, 20:37 UTC. Electricity at 18.34¢ per kWh, the U.S. residential average for June 2026 published by the EIA; 1000 cooling hours a year. Change either below.
Your numbers
Annual kWh = BTU/h × hours ÷ SEER2 ÷ 1,000. Every row below is that arithmetic and nothing else.
Every system, purchase plus running cost
Sorted by the total over 5 years at the numbers above. The purchase price is today's live Amazon price; the running cost is what the rated SEER2 implies at those hours and that tariff. Cooling only — every system here is a heat pump, but heating efficiency is a different rating (HSPF2) that listings rarely state, so it is not estimated.
| System | BTU/h | SEER2 | Price | kWh / yr | $ / yr | 5-yr total |
|---|---|---|---|---|---|---|
| TURBRO 9,000 BTU Ductless Mini Split 115V | 9,000 | 23 | $580 | 391 | $72 | $939 |
| TURBRO 12,000 BTU Ductless Mini Split Invert | 12,000 | 23 | $600 | 522 | $96 | $1,078 |
| TURBRO 12,000 BTU Ductless Mini Split Invert | 12,000 | 24 | $650 | 500 | $92 | $1,108 |
| Albott DIY 12K Pro Fast-Fit | 12,000 | 18 | $550 | 667 | $122 | $1,161 |
| Albott Easy DIY 12K 220V | 12,000 | 18 | $560 | 667 | $122 | $1,171 |
| Albott Easy DIY 12K 115V | 12,000 | 18 | $570 | 667 | $122 | $1,181 |
| YUMPIE Easy DIY 12,000 BTU 220V | 12,000 | 18 | $600 | 667 | $122 | $1,211 |
| TURBRO 18,000 BTU Ductless Mini Split Invert | 18,000 | 23 | $900 | 783 | $144 | $1,618 |
| Electactic SE7203SP 18K Easy DIY | 18,000 | 19 | $800 | 947 | $174 | $1,669 |
| TABU 24,000BTU Mini Split Air Conditioner wi | 24,000 | 21 | $690 | 1,143 | $210 | $1,738 |
| HUMSURE 18000 BTU 2‑Zone Mini Split Air Conditioner | 18,000 | 20 | $1,100 | 900 | $165 | $1,925 |
| Klimaire DIY 12,000 BTU 23 SEER2 Quick Conne | 12,000 | 23 | $1,489 | 522 | $96 | $1,967 |
| MRCOOL 9000 BTU Ductless Inverter Mini Split | 9,000 | 17.5 | $1,569 | 514 | $94 | $2,041 |
| Klimaire DIY 12,000 BTU 23 SEER2 Quick Conne | 12,000 | 23 | $1,589 | 522 | $96 | $2,067 |
| PerfectAire Perfect Aire 9000 BTU Quick Connect | 9,000 | 18 | $1,668 | 500 | $92 | $2,126 |
| MRCOOL Easy Pro 12K 5th Gen | 12,000 | 19.5 | $1,649 | 615 | $113 | $2,213 |
| MRCOOL DIY 12K 5th Gen | 12,000 | 19.5 | $1,800 | 615 | $113 | $2,364 |
| PerfectAire Perfect Aire 12,000 BTU Mini Split AC & Heat | 12,000 | 17 | $1,720 | 706 | $129 | $2,367 |
| Zone Air 9,000 BTU DIY Ductless Mini Split 115V | 9,000 | 23 | $2,100 | 391 | $72 | $2,459 |
| Zone Air 9,000 BTU DIY Ductless Mini Split 230V | 9,000 | 24 | $2,150 | 375 | $69 | $2,494 |
| Klimaire DIY 18K Quick Connect | 18,000 | 23 | $1,789 | 783 | $144 | $2,507 |
| MRCOOL DIY 9K 4th Gen | 9,000 | 23.6 | $2,309 | 381 | $70 | $2,659 |
| Zone Air 12,000 BTU DIY Ductless Mini Split 115V | 12,000 | 23 | $2,200 | 522 | $96 | $2,678 |
| Zone Air 12,000 BTU DIY Ductless Mini Split 230V | 12,000 | 24 | $2,250 | 500 | $92 | $2,708 |
| Klimaire DIY 24,000 BTU 23 SEER2 Quick Conne | 24,000 | 23 | $1,965 | 1,043 | $191 | $2,922 |
| PerfectAire Perfect Aire 24,000 BTU Mini Split AC & Heat | 24,000 | 17 | $2,025 | 1,412 | $259 | $3,320 |
| Zone Air 18,000 BTU DIY Ductless Mini Split | 18,000 | 23.5 | $2,800 | 766 | $140 | $3,502 |
| MRCOOL DIY 18K 5th Gen | 18,000 | 21 | $2,909 | 857 | $157 | $3,695 |
| PerfectAire Perfect Aire 35000 BTU Quick Connect DIY Min | 35,000 | 22 | $2,500 | 1,591 | $292 | $3,959 |
| Klimaire DIY 36,000 BTU 23 SEER2 Quick Conne | 36,000 | 23 | $2,649 | 1,565 | $287 | $4,084 |
| Zone Air 2 Zone 18,000 BTU 9K+9K | 18,000 | 24 | $3,700 | 750 | $138 | $4,388 |
| MRCOOL DIY Multi Zone 18K 3-Zone | 18,000 | 23.9 | $3,718 | 753 | $138 | $4,409 |
| Zone Air 2 Zone 21,000 BTU 12K+9K | 21,000 | 24 | $3,700 | 875 | $160 | $4,502 |
| MRCOOL 24000 BTU 230V Ductless Inverter Mini | 24,000 | 18 | $3,329 | 1,333 | $245 | $4,552 |
| Zone Air 2 Zone 24,000 BTU 12K+12K | 24,000 | 24 | $3,700 | 1,000 | $183 | $4,617 |
| Zone Air 2 Zone 27,000 BTU DIY Ductless Mini | 27,000 | 24 | $4,200 | 1,125 | $206 | $5,232 |
| MRCOOL DIY 36K 4th Gen | 36,000 | 18 | $3,749 | 2,000 | $367 | $5,583 |
| Zone Air 3 Zone 33,000 BTU DIY Mini Split He | 33,000 | 24 | $4,400 | 1,375 | $252 | $5,661 |
| Zone Air 3 Zone 36,000 BTU 12K x3 | 36,000 | 24 | $4,500 | 1,500 | $275 | $5,875 |
| Zone Air 3 Zone 36,000 BTU 9K+9K+18K | 36,000 | 24 | $4,900 | 1,500 | $275 | $6,275 |
SEER2 is a seasonal average at rated load; inverter systems modulate, so a real bill will differ. The figures are comparable with each other under the same assumptions, which is what they are for.
Compare two systems
When a higher rating pays back, and when it never does
The answer is a ratio, not a rule: the extra purchase price divided by the yearly saving. Both halves move independently. The saving depends only on capacity, the two SEER2 ratings, your hours and your tariff; the extra price depends on which two systems you are choosing between. When the efficient unit is only a little dearer — as with the pair at the top of this page — the payback is a few years. When it is a thousand dollars dearer, the same saving takes decades, longer than the unit will last.
Two things push the payback shorter: a long cooling season and an expensive tariff. Both are inputs above, and both are yours to set — the site does not know where you live. The comparison tool takes any two systems in the catalogue and shows the ratio for that pair, so the question “is the better rating worth it” gets a number instead of an opinion.
Efficiency matters for other reasons too: a higher-SEER2 unit is usually a better inverter that holds temperature more evenly, and it may qualify for a rebate this page cannot see. But the claim that it pays for itself is arithmetic, and the arithmetic is here.
Full ranking by $/BTU · What one costs to buy · What counts as a good price