Rheem 325L (551325)
Rebates up to
$1,280
STC $560 · ESC $720 (NSW)
Replace-electric, medium household, best zone. Federal STCs plus the better of VIC (VEECs) or NSW (ESCs). Enter your postcode below for exact figures.
AS/NZS 4234 energy savings
64%
vs the standard's reference electric storage water heater, medium load, best zone.
Register data as at CER (STC) 2026-04-30
Specifications
| Type | Integral all-in-one |
| Tank volume | 325 L |
| Tank material | Vitreous enamel (Rheemglas) |
| Rated power input | 0.8 kW |
| COP | 3.6 |
| Electric backup | 3.6 kW |
Specs from: Rheem Australia MPi series dealer listing (rheem.com.au); public STC / 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 | 11 STCs | $440 |
| Zone 2 | 10 STCs | $400 |
| Sydney (Z3) | 13 STCs | $520 |
| Melbourne (Z4) | 14 STCs | $560 |
| Canberra (Z5) | 13 STCs | $520 |
VEU — VEECs (Victoria)
Not yet registered for VEECs.
ESS — ESCs (NSW)
| Zone | Repl. electric metro / regional | Repl. gas metro / regional | Energy savings (medium load) |
|---|---|---|---|
| Sydney (Z3) | 24 / 24 | 9 / 9 | 64.4% |
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 Rheem MPi 551325 is an all-in-one, outdoor-installation-only air-sourced heat pump water heater with a 325 L Rheemglas vitreous-enamel-lined tank (180 L boost capacity), suited to 2-5 person households. Rated heat pump power input is 800 W, with a 3.6 kW electric backup element and a declared COP of 3.6.
The unit is designed for connection to a 24-hour continuous tariff or an extended off-peak supply (minimum 16 hours per day, replacement-model and climate dependent).
Refrigerant type, sound level, ambient operating range, dimensions and warranty are not confirmed from the sources reviewed and are omitted here.
Registered model codes
551325
Homeowners
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