Description
The EG4 12K hybrid solar mini split is a 12,000 BTU single-zone AC/DC heat pump (indoor DGA3-ACDC1-12KR2, outdoor DWA4-ACDC1-12R2) that runs on solar panels wired directly to the outdoor unit, 115 VAC grid power, or both. It covers approximately 650 sq ft and is designed for DIY install with pre-charged quick-connect line sets, sold as an add-on option. A good fit for bedrooms, home offices, tiny homes, cabins, workshops and garages.
How the Hybrid Solar Works
- Solar first: panels connect straight to the DC input on the outdoor unit (90–380 VDC, up to 1,100 W). The system automatically prioritizes solar over AC.
- Grid backfill: with 115 VAC connected, the unit automatically switches to or supplements with AC power when solar is low, at night, or on cloudy days.
- Three modes: solar only, solar with supplemental AC, or AC only. Solar is optional; it also runs as a standard grid-powered mini split.
- No separate inverter or battery bank required to run on solar during the day. In solar-only mode the unit may sleep in low light, so EG4 recommends keeping AC connected for nights and cloudy days.
Key Benefits
- High efficiency: SEER2 22.5, EER2 12.6, HSPF2 9.7 (AHRI certified, ref. 216772358).
- Direct solar input: up to 1,100 W of PV at 90–380 VDC; EG4 says sunny days can deliver 100% daytime energy savings when running on solar.
- Heats and cools: inverter heat pump cooling at 32–131°F and heating down to 5°F outdoor temperature.
- DIY-friendly install: pre-charged quick-connect line sets with self-closing valves; no vacuum pump or special HVAC tools needed. Line set: choose No Line Set, 16 ft, or 26 ft (sold as an add-on option).
- Simple power: runs on a standard 115V circuit (20A max breaker).
- R32 refrigerant, factory pre-charged; lower global warming potential than older refrigerants (per EG4).
- Control your way: IR remote or smartphone app over Wi-Fi.
Sizing Guidance
EG4 rates the 12K hybrid for spaces of approximately 650 sq ft. As general guidance, actual needs vary with climate, insulation, ceiling height, sun exposure and windows; rooms that are poorly insulated or in very hot or cold climates may need more capacity. For multiple rooms with separate heads, see EG4's multi-zone hybrid systems; this single-zone unit is not compatible with EG4 multi-zone outdoor units.
Lineset Options
Line set: choose No Line Set, 16 ft, or 26 ft (sold as an add-on option). Line sets are pre-charged quick-connect sets; choose the length that reaches between your indoor and outdoor units, or No Line Set if you already have one. Pre-charged line sets do not require additional refrigerant. Total line length must not exceed 49.2 ft (15 m).
Specifications
| Indoor / outdoor model | DGA3-ACDC1-12KR2 / DWA4-ACDC1-12R2 |
|---|---|
| Cooling capacity | 12,000 BTU/h (3,000–12,500 BTU/h) |
| Heating capacity | 12,000 BTU/h (3,000–13,000 BTU/h) |
| SEER2 / EER2 | 22.5 / 12.6 |
| HSPF2 | 9.7 (HSPF2-4 / AHRI Region IV) |
| AC power | 115 VAC, 60 Hz, single phase |
| Minimum circuit ampacity / max breaker | 19.05A / 20A |
| Solar DC input voltage | 90–380 VDC |
| Max PV open-circuit voltage (Voc) | ≤380 VOC |
| Max PV current (Isc) | ≤12A |
| Rated PV wattage | 1,100 W |
| Refrigerant / factory charge | R32, 27.52 oz (0.81 L) |
| Line set | Choose No Line Set, 16 ft, or 26 ft (sold as an add-on option) |
| Additional refrigerant | 0.16 oz per additional ft (pre-vacuumed extensions only) |
| Liquid / gas valve size | 1/4 in. / 3/8 in. (9.52 mm) |
| Max line set length | 49.2 ft (15 m) |
| Max elevation between units | 26.2 ft (8 m) |
| Compressor | Rotary |
| Outdoor operating range, cooling | 32–131°F (0–55°C) |
| Outdoor operating range, heating | 5–86°F (-15–30°C) |
| Indoor unit sound | 29–41.5 dB(A) |
| Outdoor unit sound | 52 dB(A) |
| Indoor unit dimensions (W×D×H) / weight | 33.1 × 8.1 × 11.6 in. / 20.9 lb |
| Outdoor unit dimensions (W×D×H) / weight | 31.6 × 12.7 × 22.2 in. / 70.6 lb |
| Control | IR remote + smartphone app (Wi-Fi) |
| AHRI reference number | 216772358 |
| Warranty | 5-year limited |
What's in the Box
- Indoor wall-mounted unit
- Outdoor unit
- Remote control
- Installation accessories
- 16 ft or 26 ft pre-charged line set, only if selected (No Line Set ships without one)
Warranty
5-year limited warranty from EG4 Electronics. Register at eg4electronics.com/warranty.
FAQ
Can the EG4 12K hybrid mini split run on solar only?
Yes. It can run entirely on solar through its DC input (90–380 VDC). In low light it may enter sleep mode, so EG4 recommends also connecting 115 VAC power.
Do I need batteries or an inverter?
No. Solar panels connect directly to the outdoor unit and the unit uses AC grid power as backup, so no separate inverter or battery bank is required for daytime solar operation.
Does it work in cold weather?
It heats at outdoor temperatures down to 5°F (-15°C) and cools at up to 131°F (55°C).
Is the EG4 hybrid mini split DIY installable?
Yes. It ships pre-charged with R32 and uses a quick-connect line set with self-closing valves, so no vacuum pump is needed. Electrical and solar wiring must follow local codes, and EG4 recommends a qualified electrician or solar technician for those connections.
How many solar panels do I need for the EG4 12K?
It accepts up to 1,100 W of solar input at 90–380 VDC, with array open-circuit voltage at or below 380 V and current at or below 12A. Panel count depends on panel wattage and voltage; EG4 recommends array sizing by a qualified solar technician. Our 12K kits bundle matched panels.
How many square feet does the EG4 12K cover?
EG4 rates it for approximately 650 sq ft. Actual coverage depends on climate and insulation.
What happens at night or on cloudy days?
With AC connected, the unit automatically supplements or switches to grid power, while still prioritizing any available solar.
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