MUYANG 300L (MY-HWS-A2-300E)
Rebates up to
$680
STC $680
Replace-electric, medium household, best zone. Enter your postcode below for exact figures.
VIC Solar Homes rebate
$1,000
50% of installed price, point-of-sale. Stacks with STC/VEEC above.
VIC only. Assumed eligible, not confirmed against the live Solar Victoria product list.
Register data as at CER (STC) 2026-04-30
Specifications
| Type | Integral all-in-one |
| Refrigerant | R134A/R290 |
| Tank volume | 300 L |
| Tank material | Enamelled steel (2.5mm lining) |
| Rated heating capacity | 3.86 kW |
| Rated power input | 0.67 kW |
| COP | 5.76 (Manufacturer eco-mode figure; not an AS/NZS 5125.1 test result) |
| Hot water delivery | 75 °C |
| Operating ambient | -10 to 43 °C |
| Tank height | 2173 mm |
| Heat pump weight | 135 kg |
| Electric backup | 2 kW |
Specs from: Shandong Muyang New Energy Co., Ltd. Square All-In-One Heat Pump Water Heater product page (en.muyangsolar.com); public CER SRES register (air-source heat pump models list).
Certificate rebate by postcode
Registered certificate values
Every scheme this model is registered for, by zone. STCs at $40, VEECs at $85, ESCs at $30 (reference prices as at 2026-07-07). Claim year 2026, medium household.
SRES — STCs (national)
| Zone 1 | 13 STCs | $520 |
| Zone 2 | 13 STCs | $520 |
| Sydney (Z3) | 16 STCs | $640 |
| Melbourne (Z4) | 17 STCs | $680 |
| Canberra (Z5) | 17 STCs | $680 |
VEU — VEECs (Victoria)
Not yet registered for VEECs.
ESS — ESCs (NSW)
Not yet registered for ESCs.
Certificate counts are computed from the model's registered performance data using the current regulated equations. A lodged claim depends on the specific installation, household size, and the scheme rules in force at creation. Energy savings % is against the AS/NZS 4234:2021 reference electric storage water heater for that zone, medium household, calculated from the model's registered performance data.
The MUYANG MY-HWS-A2-300E is an all-in-one heat pump water heater in MUYANG’s square-cabinet second-generation line: a 300 L enamelled-steel tank with the compressor, microchannel heat exchanger, and DC inverter fan built into the same square cabinet. In eco mode the unit delivers 3.86 kW of heating at a 0.67 kW power input (COP 5.76). The unit runs in ambient temperatures from -10 to 43 degrees C and carries a 2 kW electric element for boost or backup heating.
Water is delivered at up to 75 degrees C. The dual refrigerant listing (R134A/R290) is as published by the manufacturer, with a GMCC compressor across the range; no further detail on which circuit uses which refrigerant was available in the source material.
MUYANG is a Shandong Muyang New Energy Co., Ltd. product line supplied into the Australian SRES market as an OEM/ODM unit. No installation or owner’s manual was located publicly; specifications here are drawn from the manufacturer’s own product page for the square-cabinet A2 series, distinct from the round-cabinet A1 series (MY-HWS-A1-270E/300E) already in this database.
Registered model codes
MY-HWS-A2-300E*
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