Viessmann 270L (Vitocal 161-A 270 OS)
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Rebates up to
$1,450
STC $640 · VEEC $765 (VIC) · ESC $810 (NSW)
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.
AS/NZS 4234 energy savings
79%
vs the standard's reference electric storage water heater, medium household, best zone.
Register data as at CER (STC) 2026-04-30 · VEU 2026-07-01
Specifications
| Type | Integral all-in-one |
| Refrigerant | R290 |
| Tank volume | 270 L |
| Rated heating capacity | 2.78 kW |
| Rated power input | 0.685 kW |
| COP | 4.15 (A 20/15, W 15-55) |
| Sound level | 46 dB(A) |
| Operating ambient | -7 to 43 °C |
| Tank height | 1838 mm |
| Tank diameter | 620 mm |
| Tank weight (empty) | 140 kg |
| Electric backup | 1.8 kW |
Specs from: Viessmann AU Vitocal 161-A brochure (viessmann.com.au); public 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) | 15 STCs | $600 |
| Melbourne (Z4) | 16 STCs | $640 |
| Canberra (Z5) | 15 STCs | $600 |
VEU — VEECs (Victoria)
| Zone | Repl. electric metro / regional | Repl. gas | Energy savings |
|---|---|---|---|
| Melbourne (Z4) | 9 / 9 | 7 | 78.6% |
| Canberra (Z5) | 8 / 9 | 7 | 76.7% |
ESS — ESCs (NSW)
| Zone | Repl. electric metro / regional | Repl. gas metro / regional | Energy savings |
|---|---|---|---|
| Sydney (Z3) | 26 / 27 | 11 / 11 | 70.4% |
| Canberra (Z5) | 27 / 27 | 11 / 11 | 66.7% |
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 Vitocal 161-A 270 OS is an all-in-one heat pump water heater: an R290 heat pump module built into the same cabinet as a 270 L DHW cylinder, standing 1838 mm high and 620 mm in diameter, sized for up to 6 people. It shares the same heat pump module and performance data as the 200 L model in the range.
At the A 20/15, W 15-55 rating point the unit delivers 2.78 kW heating output for 0.685 kW power input, a COP of 4.15. Sound level is 46 dB(A), and a 1.8 kW electric element is built in as backup. Ambient operating range is -7 to 43 degrees C, and net unit weight is 140 kg.
Viessmann’s AU brochure lists this model as the “Vitocal 161A 270OS”, matching the register’s “Vitocal 161-A 270 SO” directly on tank volume, weight, and dimensions.
Registered model codes
Vitocal 161-A 270 SO
Homeowners
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