This is a single-zone hybrid mini split system for cooling and heating one room without ductwork. It runs on either 115VAC household power or 90-380VDC solar input, built for homeowners who want to add off-grid or grid-hybrid comfort to a room, cabin, or workshop.
The EG4 12K Hybrid AC/DC mini split is a wall-mounted, single-zone system designed to run on either standard 115VAC household power or direct DC solar input. It's AHRI-style rated at SEER2 22.5 and EER2 12.6, per the manufacturer spec sheet. Note: If you would like to review the manufacturer Product Specifications, Warranty, Brochure, etc., for this system, please refer to the "Resources (System Manuals and Warranty)" Tab above on this page.
System Components
- Outdoor condensing unit: model DWA4-ACDC1-12R2, accepts 115VAC and/or 90-380VDC solar input
- Indoor wall-mounted head: model DGA3-ACDC1-12KR2, 12,000 BTU/h rated cooling and heating
Installation Requirements & Accessories
- Voltage: 115VAC (AC input) — this unit is NOT rated for 208/230VAC circuits
- DC input: 90-380VDC directly from solar panels, up to 1100W rated PV wattage
- Pre-charged refrigerant line set included: 16.4 ft (5 m), R32 refrigerant
- Line set extensions beyond 16.4 ft are sold separately and require pre-vacuuming plus 0.16 oz R32 per additional foot
- Outdoor wall mounting bracket is NOT included with this kit
- Maximum breaker size: 20A; minimum circuit ampacity: 19.05A
Pro-Installer Tip
The quick-connect, self-sealing companion valves eliminate the need for a vacuum pump on the factory-charged 16.4 ft run — but the fittings still depend on a clean, unkinked line set to seal properly. A sharp bend near the wall penetration can restrict flow or crack the flare seat over time, leading to slow refrigerant loss and eventual "E1"-type communication faults between indoor and outdoor units. Use a line set bending mandrel to form gentle radius turns rather than hand-bending the copper. This keeps the R32 charge sealed at the rated <651 PSIG design pressure and preserves the system's published SEER2 22.5 efficiency rating over the life of the unit.
Key Benefits
- Variable-speed inverter-driven compressor (Rotary type) for steady temperature control
- Hybrid AC/DC input lets you run on solar during the day and grid power at night
- Indoor sound pressure as low as 29 dB(A) on lowest fan speed
- SEER2 22.5 and EER2 12.6 cooling efficiency, COP 12.25 heating efficiency
- Pre-charged line set and no-vacuum quick-connect valves simplify self-installation
- 5-year limited DIY warranty rating
Technical Table
| Spec | Value | Unit |
|---|---|---|
| Cooling Capacity (Rated) | 12,000 | BTU/h |
| Cooling Capacity Range | 3,000 - 12,500 | BTU/h |
| Heating Capacity (Rated) | 12,000 | BTU/h |
| Heating Capacity Range | 3,000 - 13,000 | BTU/h |
| SEER2 | 22.5 | W/W |
| SEER | 20.8 | W/W |
| EER2 | 12.6 | BTU/W |
| HSPF2-5 | 7.9 | W/W |
| COP | 12.25 | BTU/W |
| AC Rated Voltage | 115 | VAC |
| DC Rated Voltage Range | 90 - 380 | VDC |
| Rated Current (AC) | 8.3 | A |
| Minimum Circuit Ampacity | 19.05 | A |
| Maximum Breaker Size | 20 | A |
| Max Starting Current | 4 | A |
| Maximum PV Wattage | 1100 | W |
| Maximum PV Voltage (Voc) | 380 | VOC |
| Maximum PV Amperage (Isc) | 12 | A |
| Refrigerant Type | R32 | - |
| Refrigerant Charge | 27.52 (0.81 L) | oz |
| Design Pressure | <651 | PSIG |
| Pre-Charged Line Set Length | 16.4 | ft |
| Liquid Valve Diameter | 1/4 (6.35 mm) | in |
| Gas Valve Diameter | 3/8 (9.52 mm) | in |
| Max Refrigerant Pipe Length | 49.2 | ft |
| Max Elevation Between Units | 26.2 | ft |
| Indoor Sound Pressure (Turbo/5/4/3/2/1) | 41.5/37.5/34.5/32/31/29 | dB(A) |
| Outdoor Sound Pressure (Hi/Med/Lo) | 52 | dB(A) |
| Operating Temperature Range (Cooling) | 61 - 90 | °F |
| Operating Temperature Range (Heating) | 32 - 90 | °F |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- Matched AHRI-style pair: indoor model DGA3-ACDC1-12KR2 with outdoor model DWA4-ACDC1-12R2
- Compatible with dedicated 115VAC circuits, and/or 90-380VDC solar input up to 1100W
- NOT compatible with 208/230VAC-only circuits
- NOT a listed match for the EG4 24K system components (DWB3-ACDC-24R2 / DGA2-ACDC-24KR2)
- Pre-charged 16.4 ft line set is included; extensions beyond that length are sold separately
- Outdoor wall mounting bracket is NOT included
FAQ
What breaker size do I need for this system?
This 12K hybrid unit has a maximum breaker size of 20A on the 115VAC circuit, with a minimum circuit ampacity of 19.05A.
Is professional installation required to keep the warranty valid, or is this a true DIY kit?
This is a true DIY kit. It uses quick-connect, self-closing companion valves on a pre-charged refrigerant line, so no vacuum pump, gauges, or brazing are required. A 5-year limited DIY warranty applies to self-installation.
Is the line set included, and if not, what size do I need to buy?
A 16.4 ft (5 m) pre-charged line set is included with the system. If you need additional length beyond that, pre-vacuumed extensions require 0.16 oz of R32 per additional foot; maximum total pipe length is 49.2 ft.
Does this system work in cold climates (low-ambient heating)?
The published heating operating temperature range for this unit is 32°F to 90°F. Performance below that range is [NEEDS VERIFICATION].
Can I run this unit on solar power directly?
Yes. The outdoor unit accepts 90-380VDC directly from solar panels rated up to 1100W, in addition to a standard 115VAC connection, allowing daytime operation on solar power alone.
Compliance & Warranty
Limited parts warranty applies to self-installation; see manual for details. Manufacturer rating listed as a 5-year limited DIY warranty. You are still responsible for following EPA Section 608 refrigerant handling regulations where they apply to your installation, even on a no-vacuum quick-connect system — ask us before you order if you're unsure how this affects your setup.
