Earthworker Energy 315L (NA42-SS315A)
Rebates up to
$2,765
STC $600 · VEEC $765 (VIC) · Solar Homes up to $1,400 (VIC)
Replace-electric, medium household, best zone. Federal STCs plus the better of VIC (VEECs and Solar Homes) or NSW (ESCs). Enter your postcode below for exact figures.
VIC Solar Homes rebate
$1,400
50% of installed price up to this cap, point-of-sale, local-content tier. Included in the VIC total above.
VIC only. This model is on Solar Victoria's product list.
AS/NZS 4234 energy savings
63%
vs the standard's reference electric storage water heater, small load, best zone.
Register data as at CER (STC) 2026-04-30 · VEU 2026-08-05
Specifications
| Type | Standalone split |
| Refrigerant | R32 |
| Tank volume | 315 L |
| Tank material | Stainless steel (316) |
| Rated heating capacity | 3.5 kW |
| Rated power input | 0.865 kW |
| Sound level | 51 dB(A) |
| Hot water delivery | 55 °C |
| Operating ambient | -7 to 43 °C |
| Tank height | 1990 mm |
| Tank diameter | 620 mm |
| Heat pump weight | 50 kg |
| Tank weight (empty) | 70 kg |
| Electric backup | None (heat pump only) |
| Warranty | Tank 15, refrigeration 6, electrical 5 (parts); 1 year parts and labour on all components |
Certified to
Specs from: Earthworker Energy / Neopower NA42-SS315A Installation and Operation Instructions; public CER SRES / VEU / ESS registers.
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 | 12 STCs | $480 |
| Zone 2 | 12 STCs | $480 |
| Sydney (Z3) | 14 STCs | $560 |
| Melbourne (Z4) | 15 STCs | $600 |
| Canberra (Z5) | 15 STCs | $600 |
VEU — VEECs (Victoria)
| Zone | Repl. electric metro / regional | Repl. gas | Energy savings (small load) |
|---|---|---|---|
| Melbourne (Z4) | 8 / 9 | 7 | 62.7% |
| Canberra (Z5) | 8 / 9 | 7 | 61.5% |
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 and load size, calculated from the model's registered performance data, or taken directly from the register where it publishes a savings figure. VEU registers this data at the small load (the step-down load for a medium-rated system) and ESS at the medium load, so the two schemes' figures differ for the same zone.
The Earthworker Energy NA42-SS315A is a split-system heat pump water heater: an outdoor R32 heat pump unit (KR35/DN4-A, 770 g charge) connected by insulated 20 mm copper send-and-return water pipes to a 315 L stainless steel (316) storage tank. The heat pump delivers 3.5 kW of heating capacity at a rated power input of 865 W, and runs across an ambient range of -7 to 43 degC, with a standard outlet temperature of 55 degC and a measured sound level of 51 dB(A).
An electric booster element is available as an option but is not fitted as standard, so the base unit relies on the heat pump alone. The heat pump unit weighs 50 kg net (931 x 407 x 551 mm) and the empty tank 70 kg net (620 mm diameter, 1990 mm tall).
The manual cites AS/NZS 3500.4 and AS/NZS 3000 as applicable installation standards. Warranty is 15 years on the tank, 6 years on refrigeration, 5 years on electrical components (parts only), with 1 year parts and labour across all components. The same physical product is sold under both the Earthworker Energy and Neopower brand names, with matching register entries under each.
Registered model codes
NA42-SS315A
Homeowners
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