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MRCOOL Advantage 5G 36,000 BTU 18 SEER2 Ductless Mini Split Air Conditioner and Heat Pump - 230V MRCOOL Advantage 5G 36,000 BTU 18 SEER2 Ductless Mini Split Air Conditioner and Heat Pump - 230V $2,020.95
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Pioneer Quantum Ultra 24,000 BTU Ductless Heat Pump — 20 SEER2, -13°F Heating

Reliable Climate Control for Grid-Independent Living

Heats to -13°F — Ultra-low ambient heating keeps cabins warm in deep winter
20.0 SEER2 Efficiency — Reduces power draw from your solar or grid supply
Covers 1,000 sq ft — Floor, ceiling, or low-wall mount for flexible installation
R454b Refrigerant Precharged — Factory-precharged with next-generation environmentally friendly coolant
  • FREE Shipping -- Ships free on all orders, including LTL freight
  • FREE System Design Consultation -- Our team helps size HVAC to your off-grid power system

Price range: $1,832.95 through $2,160.95

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Pioneer® Quantum Ultra™ 24,000 BTU 20 SEER2 230V Floor/Ceiling/Low-Wall Ductless Mini-Split Air Conditioner Inverter Heat Pump Full Set
Pioneer® Quantum Ultra™ 24,000 BTU 20 SEER2 230V Floor/Ceiling/Low-Wall Ductless Mini-Split Air Conditioner Inverter Heat Pump Full Set
$1,832.95 – $2,160.95Price range: $1,832.95 through $2,160.95

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In the box

  • Indoor floor/ceiling unit (UT024GLSILSFHG)
  • Outdoor condenser unit
  • Wireless remote control
  • Line set installation kit (select length at checkout)
Pioneer® Quantum Ultra™ 24,000 BTU 20 SEER2 230V Floor/Ceiling/Low-Wall Ductless Mini-Split Air Conditioner Inverter Heat Pump Full Set
Pioneer Quantum Ultra 24,000 BTU Ductless Heat Pump — 20 SEER2, -13°F Heating
$1,832.95 – $2,160.95Price range: $1,832.95 through $2,160.95

Reliable Climate Control for Grid-Independent Living

The Pioneer Quantum Ultra delivers 22,200 BTU of cooling and 24,400 BTU of heating through a field-tested DC inverter system that keeps working when conditions get extreme. Rated for operation down to -13°F in heating and up to 131°F in cooling, this off-grid unit handles the temperature swings that standard systems simply quit on. With 20.0 SEER2 efficiency and R454b refrigerant, it's built-to-survive the demands of remote cabins, homesteads, and backup power setups where reliability isn't optional.

FREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORT
20.0 SEER2 Efficiency
-13°F Heating Capability
R454b Refrigerant
DC Inverter Drive
22,200 BTU/h
Cooling Capacity
24,400 BTU/h
Heating Capacity
20.0 SEER2
Cooling Efficiency
Heat Through Deep Winter Without Draining Your Battery Bank

Heat Through Deep Winter Without Draining Your Battery Bank

Most mini-splits shut down or lose efficiency long before temperatures hit single digits. The Quantum Ultra keeps delivering 24,400 BTU of heating down to -13°F — the kind of cold that forces grid-dependent homeowners to rely on propane or wood. For anyone building a grid-independent home or cabin, that operating range matters because your battery bank is finite. Every watt wasted on an inefficient compressor shortens your autonomy. This unit uses a variable-speed DC inverter to modulate output precisely, drawing only what your space actually needs. At Off Grid Vault, we vet HVAC for real-world off-grid performance — not lab conditions — so you know it integrates cleanly with your power system.

20.0 SEER2 Means Fewer Panels and Smaller Battery Banks

20.0 SEER2 Means Fewer Panels and Smaller Battery Banks

At 20.0 SEER2 and 11.7 EER2, this unit extracts more cooling per watt than standard mini-splits. For off-grid builders, that efficiency translates directly into system cost. A less efficient unit running the same 750–1,000 sq ft space would demand more solar capacity and a larger battery bank to maintain the same runtime. The DC inverter compressor eliminates the massive startup surge of fixed-speed units, reducing peak demand on your inverter. Dual-axis motorized louvers distribute air evenly, eliminating cold spots that lead users to run the unit longer than necessary. Washable, reusable filters cut ongoing replacement costs — a small detail that adds up over a decade of off-grid living.

Floor, Ceiling, or Low-Wall — Install Where Standard Mini-Splits Cannot

Floor, Ceiling, or Low-Wall — Install Where Standard Mini-Splits Cannot

The Quantum Ultra is not a wall-hanging unit. It mounts as a floor console, ceiling unit, or low-wall cassette — configurations that standard mini-split indoor units simply do not offer. For cabins with slanted ceilings, tiny homes with limited wall space, or homesteads where ducted systems are impractical, this flexibility solves a real installation problem. Dual-drainage ports accommodate different condensate routing scenarios depending on your mount position. The IFEEL mode uses the remote as a temperature sensor, adjusting output based on where you actually sit rather than where the unit is mounted. Memory recall saves your preferred settings after power interruptions — relevant when your off-grid system cycles or transfers between power sources.

Compatibility Checklist

Confirm your setup meets these requirements before ordering.

  • 208/230V, 60Hz, 1Ph electrical supply available at install location
  • Heating operation required at ambient temperatures as low as -13°F
  • Compatible line set length selected: 10, 16, 25, 33, or 50 ft

Where This Unit Performs

Engineered for the environments where conventional HVAC fails — remote structures, solar-powered builds, and homes that can't afford downtime.

Remote Cabin Climate Control
Off-Grid Homestead HVAC
Emergency Backup Heating & Cooling

Full specifications

At a glance

Dimensions
See product page
Power
208~230V, 60Hz, 1Ph
Surface
See product page
Full specifications13 data points across 4 categories

Dimensions

Unit DimensionsSee product page

Power & Performance

System Kit Power Supply208~230V, 60Hz, 1Ph
Cooling Rated Capacity22,200 BTU/h
Cooling Capacity Range6,010~24,610 BTU/h
Cooling SEER220.0 BTU/W.h
Cooling EER211.7 BTU/W.h
Heating Rated Capacity24,400 BTU/h
Heating Capacity Range4,750~28,640 BTU/h
Heating HSPF2 (Region IV)9.5 / 8.5 BTU/W.h
Heating C.O.P.2 (47°F/5°F)3.0 / 2.0 W/W
Refrigerant TypeR454b

Materials

MaterialsSee product page

Compliance & Warranty

AHRI CertificateIncluded

The Off Grid Vault Promise

We stand behind every product we sell — because you're building something that matters.

Free ShippingShips free to your door — LTL freight on large systems, no surprise charges.
30-Day Performance GuaranteeIf it doesn't perform as specified, we make it right. Uninstalled returns accepted within 30 days in original packaging.
Free System Design ConsultationOur engineers size your system for your actual consumption — no guesswork, no incompatible components.
★★★★★
“Installed this in our 800 sq ft off-grid cabin in northern Idaho. We hit -8°F last January and the Quantum Ultra kept the place at 68°F without issue. The floor mount worked perfectly with our slanted ceiling — standard wall mounts were never an option here. I was worried about the power draw on our 48V LiFePO4 bank, but the inverter compressor barely spikes on startup. Running it on a Sol-Ark with plenty of headroom. This is exactly the kind of HVAC you need when you cannot call the power company.”
M
Mike L.Sandpoint, ID

Summary

  • High Efficiency Quantum Ultra Floor/Ceiling/Low-Wall Ductless Split Heat Pump System
  • Cooling capacity: 22,200 BTU/H with 20.0 SEER2 / 11.7 EER2 efficiency
  • Heating capacity: 24,400 BTU/H with 9.5 HSPF2 / 3.0 COP2 efficiency
  • Voltage: 208/230V, 60Hz, 1Ph
  • Floor/Ceiling/Low-Wall Mounted Ductless Air Conditioning & Heating System
  • Variable-Speed DC Inverter Driven Performance
  • Factory-Precharged with Environmentally Friendly R454b Refrigerant
  • Ultra Low Ambient Range Operation (As low as -13°F in Heating / As high as 131°F in Cooling)

Features

  • Heat Pump with Cooling, Heating, Dry, and Ventilation Modes
  • Dual-Drainage Ports
  • Washable, Reusable Air Filters
  • Dual-Axis Airflow (Motorized Up-Down and Left-Right Louvers
  • Functional Remote with:
    • ECO and SLEEP Modes, for Energy-Conservation
    • Timer On/Off Control
    • TURBO, for Times of High-Demand
    • Self-Clean Cycle
    • MEMORY, to Recall Favorite Settings
    • IFEEL, to Detect and Adjust to Local Temperature

Technical Information & Performance

  • System Kit

    • Power Supply: 208~230V, 60Hz, 1Ph
    • Cooling Rated Capacity: 22,200 BTU/h
    • Cooling Capacity Range: 6,010~24,610 BTU/h
    • Cooling SEER2: 20.0 BTU/W.h
    • Cooling EER2: 11.7 BTU/W.h
    • Heating Rated Capacity: 24,400 BTU/h
    • Heating Capacity Range: 4,750~28,640 BTU/h
    • Heating HSPF2 (Region IV): 9.5 / 8.5 BTU/W.h
    • Heating C.O.P.2 (47°F/5°F): 3.0 / 2.0 W/W
    • Refrigerant Type: R454b
    • Suitable Area: 750~1,000 Sq.F
    • AHRI Reference: 217048767
  • Indoor Unit

    • Part Number: UT024GLSILSFHG
    • Air Flow (Turbo/Hi/Med/Lo/Mute): 647/588/517/470/412 CFM
    • Sound Level (Turbo/Hi/Med/Lo/Mute): 53/52/48/44/40 dB(A)
    • Product Dimensions (WDH): 41″-1/2 x 26″-1/2 x 9″-1/4 Inches
    • Carton Dimensions (WDH): 44″-1/2 x 26″-1/2 x 12″ Inches
    • Net / Gross Weight: 57.3 / 68.3 lbs.
  • Outdoor Unit

    • Part Number: YN024GLSI24RPG
    • Breaker Needed: 20A (double-pole)
    • Sound Level: 54 dB(A)
    • Net Dimensions (WDH): 38″-1/2 x 16″-5/8 x 31″-5/8 Inches
    • Carton Dimensions (WDH): 40″-1/4 x 18″-7/8 x 31″-7/8 Inches
    • Net / Gross Weight: 104.7 / 119.0 lbs.

Dimension Chart

41½ 26½ 9¼ 38½ 16⅝ 31⅝ 2¼ ¾ 8½

Additional information

Installation Kit Length

10 Ft., 16 Ft., 25 Ft., 33 Ft., 50 Ft., None

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Frequently Asked Questions

Propane heating costs depend on your region and consumption, but most homeowners spending $800–$1,200 per winter on fuel alone will see the Quantum Ultra pay for itself within a few years. Unlike a gas furnace, this unit runs on electricity — and if your home is solar-powered, that electricity cost drops significantly after your system pays for itself. The 20.0 SEER2 rating means it draws fewer watts than standard mini-splits, which reduces the solar array and battery bank capacity needed to run it. You are replacing a recurring fuel cost with a one-time purchase.
This Pioneer unit ships with a valid AHRI certificate (reference 217048767), meaning its rated capacities and efficiencies have been independently verified by a third-party laboratory. Off Grid Vault vets every product for build quality and real-world performance before listing it. If it does not perform as specified, our 30-day performance guarantee covers uninstalled returns. For ongoing warranty support, we work directly with the manufacturer on your behalf so you are not left navigating a ticket queue on your own.
The Quantum Ultra runs on 208–230V, 60Hz single-phase power — the same output your hybrid inverter provides. At 22,200 BTU cooling and 24,400 BTU heating with a variable-speed DC inverter compressor, startup surge is minimal compared to fixed-speed units. The 20.0 SEER2 rating means it draws less power per BTU than standard mini-splits, reducing the load on your battery bank. For a 48V system running a 750–1,000 sq ft space, this unit is well within the capacity of most hybrid inverters rated for 3,000W+ continuous output. Select your installation kit length at checkout.
R454b is the next-generation replacement for R410A, which is being phased out under EPA regulations. It has a significantly lower Global Warming Potential while maintaining comparable cooling and heating performance. The Quantum Ultra comes factory-precharged with R454b, so you are not buying a system tied to a refrigerant with an expiring supply chain. For off-grid homeowners planning to live with this equipment for 10+ years, refrigerant availability matters — a leak repair in year seven should not require sourcing discontinued coolant. R454b is the chemistry that will be serviceable for the full life of this unit.
Select the line set length based on the distance between your indoor unit and outdoor condenser. Available lengths are 10 ft, 16 ft, 25 ft, 33 ft, and 50 ft. Measure the planned route including any vertical rises, bends, or wall penetrations — then round up to the next available size. Running a slightly longer line set than needed is preferable to coming up short. If you select 'None,' you will need to source your own line set and accessories separately. For pre-purchase guidance on sizing, reach out to our team and we will help you spec the right configuration for your layout.
Yes. The floor/ceiling/low-wall design is specifically made for installations where a standard wall-mounted mini-split will not work. A slanted ceiling mount is one of the primary use cases. The unit can be installed horizontally on a ceiling or vertically as a floor console. Dual-drainage ports give you flexibility in routing condensate depending on your chosen orientation. For cabins with exposed beam ceilings, limited wall space, or layouts where ductwork is impractical, this form factor solves the mounting problem that eliminates most mini-splits from consideration.
SKU: UYT024GLSI24RL-10S Category: Brand:

The Off Grid Vault Promise

We stand behind every product we sell — because you're building something that matters.

Free Shipping Ships free to your door — LTL freight on large systems, no surprise charges.
30-Day Performance Guarantee If it doesn't perform as specified, we make it right. Uninstalled returns accepted within 30 days in original packaging.
Free System Design Consultation Our engineers size your system for your actual consumption — no guesswork, no incompatible components.

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About pioneer Mini-Split HVAC

pioneer is a trusted manufacturer of premium mini-split hvac. OffGridVault is an authorized dealer offering the full pioneer lineup with free delivery, price match guarantee, and expert support.

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