Source
https://www.energyrating.gov.au/ — original source (opens in a new tab; the file is not redistributed)
E3 Program (2018) — A Policy Framework for Hot Water Systems in Australia & New Zealand
The trans-Tasman regulatory/market context for NZ residential water heating — not a per-model yield dataset
2018 consultation Policy Framework + Five-Year Roadmap from the Equipment Energy Efficiency (E3) Program (Energy Efficiency Advisory Team; published by EECA on behalf of AU + NZ governments). It proposes a technology-neutral test method, an online comparison tool + energy-rating label, and extended MEPS for hot-water systems. NI-useful content: water heating ≈ 28% of NZ household energy, ≈ 33% of NZ residential GHG emissions, and electricity supplies 78% of NZ water-heating energy (2014); NZ water-heating energy 16 PJ (2014) → 18 PJ (2030); electric storage is the dominant NZ system; NZ electricity ≈ 85% renewable (why electric hot water is low-emissions here); and the MEPS coverage map — heat-pump, solar, and direct-PV water heating have NO MEPS and no labelling (PV has no product measurement standard at all). ⚠ This is a policy/consultation document (
data_quality: medium, figures 2014-vintage / provisional) and is OFF-TARGET for RT_356 (which sought per-model AS/NZS 4234 TRNSYS performance listings — still outstanding).
Summary
This is the trans-Tasman E3 Program (joint Australia–New Zealand Equipment Energy Efficiency scheme) consultation document A Policy Framework for Hot Water Systems in Australia & New Zealand (2018, submissions closed 10 December 2018), developed by the Energy Efficiency Advisory Team (EEAT) and published by EECA on the NZ side. It diagnoses the market barriers to efficient water heating (split incentives, present bias, no common test method, MEPS coverage gaps) and proposes a five-year roadmap of three measures: (1) a technology-neutral method of test and common energy-performance metric; (2) improving information via an online comparison tool + database and a potential energy-rating label; and (3) extending/consolidating MEPS to technologies not currently covered (heat pump, solar electric- and gas-boosted, direct photovoltaic, instantaneous electric).
Its value to the Neobiome project is contextual, not parametric: it supplies a defensible statement of how large residential water heating is in the NZ energy/emissions picture, why NZ’s electric-dominated hot-water stock is comparatively low-emissions (≈85% renewable grid), the current NZ/AU regulatory coverage of water-heating technologies (which types have MEPS/labelling and which do not), and the NZ market structure (electric-storage-dominant, gas-instantaneous second, solar-electric sales suppressed since subsidy removal in 2012). It does not contain per-model performance data, installed costs, or the Energywise/Gen Less AS/NZS 4234 TRNSYS solar-fraction listings that RT_356 was raised to retrieve — so RT_356 stays open. Because the quantitative content is 2014-vintage (Residential Baseline Study) and the cost-benefit economics are explicitly provisional/indicative and Australia-weighted, the page is data_quality: medium.
Key claims
- claim: "Water heaters use an estimated 23% (Australia) and 28% (New Zealand) of total household energy, account for about 20% of householders' energy costs, and are responsible for around 20% of total Australian residential greenhouse-gas emissions and 33% in New Zealand. The NZ emissions share is higher than Australia's because of NZ's higher use of electric hot water systems."
source_location: "Foreword, printed p.1: 'They use an estimated 23% and 28% of total household energy use across Australia and New Zealand, account for about 20% of householders' energy costs, and are responsible for around 20% of total Australian residential greenhouse gas emissions and 33% in New Zealand.' Footnote 2: 'The share of emissions are higher in New Zealand than in Australia because of higher use of electric hot water systems compared to Australia.'"
- claim: "New Zealand's water-heating energy use was 16 PJ in 2014 and is projected to rise slowly to 18 PJ in 2030 (per the Residential Baseline Study). Electricity dominates NZ water-heating energy, contributing 78% of the total in 2014 (and is stable across the study period, while natural gas and LPG use grow off a lower base). Electric storage systems 'have been, and remain, the dominant hot water systems in New Zealand', with gas instantaneous the second most common type."
source_location: "Market Issues, printed pp.8 & 10: 'New Zealand's water heating energy use was 16 PJ in 2014, and is slowly increasing to a projected 18 PJ in 2030…'; 'Electricity use dominates the water heating energy use and contributed 78% of the total use in 2014.'; 'Electric storage hot water systems have been, and remain, the dominant hot water systems in New Zealand'; 'Gas instantaneous is the second most common type of water heating system in New Zealand'."
- claim: "New Zealand electricity generation is largely renewable (hydro, geothermal and wind), typically around 85% of total generation — which fundamentally lowers the carbon impact of electric water heating in NZ. Australia is essentially the opposite: about 86% of generation from fossil fuels (mostly coal) and 14% renewable. (For scale contrast: Australian residential water heating is about 24% of residential energy consumption and was 85 PJ in 2014, down from a 2008 peak of 95 PJ, forecast to reach ~98 PJ by 2030.)"
source_location: "Differences between Australia and New Zealand, printed p.12: 'renewable sources represent around 85% of total electricity generation'; 'Statistics on renewable electricity generation in Australia are essentially the opposite of NZ with 86% of generation being from fossil fuels (mostly coal). Renewable generation comprises the remaining 14%…'. Australia scale: printed p.9: 'In Australia water heating contributes around a quarter (24%)… 85 PJ in 2014, having declined from a peak consumption in 2008 of 95 PJ… reaches around 98 PJ in 2030.'"
- claim: "Minimum Energy Performance Standards (MEPS) cover only some hot-water technologies and are out of date. Electric-storage-water-heater MEPS were introduced in Australia in 1999 and New Zealand in 2002 (small electric made more stringent in 2005), under AS/NZS 4692:2005. Gas-water-heater MEPS were introduced in New Zealand in 2011 and Australia in 2013. Heat pump and solar water heaters have NO MEPS and NO energy labelling; direct photovoltaic (PV) water heating has no MEPS, no labelling, and no product measurement standard at all ('Nil'). There is currently no energy-labelling requirement for electric water heaters."
source_location: "Existing policies / 'Coverage of hot water technologies under the current E3 Program' table, printed pp.13–15: 'MEPS for electric storage water heaters in Australia in 1999, and in NZ in 2002. MEPS for small electric water heaters were made more stringent in 2005' (AS/NZS 4692:2005); 'MEPS under the E3 Program were introduced for gas water heaters in 2011 in New Zealand and 2013 in… Australia'; coverage table rows — Electric storage: MEPS Yes / label No; Gas: Yes / Yes (industry label); Heat pump & solar: No / No; Photovoltaic: No / No / 'Nil'."
- claim: "New Zealand solar-electric hot-water-system sales rose until 2012 then slowed, mainly because of the removal of government subsidies of $500 to $1,000 offered from 2007 until mid-2012. Approximately 30,000 new homes are built annually in New Zealand (the then-current KiwiBuild programme aimed to add 100,000 affordable homes over 10 years) — a potential driver of water-heating demand."
source_location: "Market Issues, printed p.9: 'Solar electric hot water systems sales were increasing until 2012, but have since slowed, mainly as a result of the removal of Government subsidies of $500 to $1000 that were offered from 2007 until mid-2012.'; 'at present there are approximately 30,000 new homes built annually in New Zealand.'"
- claim: "E3's high-level cost-benefit estimates — explicitly 'provisional… indicative only', in AUD, trans-Tasman combined, over ten years to 2030 — put combined benefits at up to $AUD 1,355 million at a cost of $AUD 850 million, saving upwards of 7,890 GWh of electricity and 3.67 Mt of GHG. By option: online comparison tool & database ≈ $180M cost / $320M benefit ($140M net); a common energy-rating label ≈ $580M / $835M ($255M net); and extending MEPS to solar + heat-pump water heaters ≈ $90M cost / $200M benefit ($110M net, ~1,800 GWh, over a 20-year assessment). New Zealand's share is small (e.g. under the label option: 110 GWh annual / 500 GWh cumulative and 65 kt CO2-e by 2030)."
source_location: "Introduction printed p.3 ('upwards of $AUD 1,355 million, at a cost of $AUD 850 million. Upwards of 7,890 gigawatt hours of electricity and 3.67 mega-tonnes of greenhouse gas emissions could be saved'); 'Policy options and provisional costs and benefits' printed pp.19–22 + 'Summary of provisional cost and benefits' table (online tool $180M/$320M, net $140M, NZ 190 GWh cumulative / 24 kt; label $580M/$835M, net $255M, NZ 500 GWh cumulative / 65 kt; solar+HP MEPS $90M/$200M, net $110M, 1,800 GWh). Document states these are 'provisional and… indicative only' and 'need updating'."Neobiome Intelligence relevance
This is a regulatory / market-context source for D01 (energy) and the solar-direct-PV water-heating technology page — not a parameter or cost input. Water heating is the single largest or joint-largest residential low-grade-heat load in NZ, so a defensible statement of its size, its emissions profile, and its regulatory coverage helps frame the demand any self-sufficient community system must serve, and dates the maturity of the newer water-heating options the model considers.
| Fact (NZ, 2014 unless noted) | Value | NI use |
|---|---|---|
| Water heating share of NZ household energy | ≈ 28% | Corroborates the water-heating slice of D01’s end-use split (HEEP ~29%) from an independent policy source |
| Water heating share of NZ residential GHG | ≈ 33% | Frames why decarbonising/relocating hot-water load matters more in NZ than the energy share alone suggests |
| Electricity share of NZ water-heating energy | 78% | Confirms electric-resistance/heat-pump/PV-to-heat (not gas) is the dominant NZ hot-water pathway to model |
| NZ water-heating energy | 16 PJ (2014) → 18 PJ (2030) | National envelope; directional, 2014-vintage |
| NZ renewable electricity share | ≈ 85% | The low-carbon-grid premise behind electrified hot water in NZ |
Three specific uses:
- Independent corroboration of the water-heating end-use share (D01). D01 already carries BRANZ HEEP’s ~29% water-heating end-use share; this policy source independently states ≈28% of NZ household energy and adds the ≈33% of NZ residential GHG and 78%-electricity framing — useful for the demand-side narrative, with the caveat that these are 2014 Residential-Baseline-Study-derived figures. OT_161
- Regulatory-maturity dating for the newer DHW technologies (solar-direct-PV page). As of the 2018 E3 framework, direct-PV water heating had no MEPS, no energy label, and no product measurement standard (‘Nil’), and heat-pump + solar water heaters had no MEPS/labelling either — i.e. these were regulatorily immature relative to electric-storage and gas. This dates the technology’s NZ regulatory status and explains why per-model efficiency data for these types is scarce (no mandated register/label existed). OT_161
- Market-structure context (D01). Electric storage dominant, gas instantaneous second, solar-electric sales suppressed since the 2007–2012 subsidy was removed — the installed-stock backdrop for any retrofit-to-self-sufficiency scenario. OT_161
Not usable as calculation inputs: the cost-benefit economics (Claim 6) are self-described as provisional/indicative, Australia-weighted, and in AUD — do not feed them into any NI cost cell. The NZ energy/emissions figures are 2014-vintage directional context, not current calibration values (for current NZ end-use energy use the model relies on RD_024/RD_007 EECA EEUD and RD_020 RBS 2021).
Research targets
Retrieved but OFF-TARGET — RT_356 stays OPEN
- RT_356 — NOT delivered by this source; stays OPEN. RT_356 sought the EECA Energywise / Gen Less SWH eligible-systems list with per-model AS/NZS 4234:2008 TRNSYS modelled performance (annual energy saving / solar fraction per model) — the modelled, post-G12/AS2 replacement for CR_016’s yield extrapolation. The raw filed under this RT number is instead the 2018 E3 policy framework (MEPS/labelling roadmap + market/end-use context), which carries no per-model performance listings. RT_356 therefore remains Open for the per-model modelled-yield data, with this page recorded against it as “retrieved but off-target — policy framework, not the per-model listings”. Its companion RT_357 (BRANZ SR237 HPWH field study) is likewise unaffected.
Related — already covered (no new RT)
- NZ water-heating end-use energy. The ~28% household-energy / 78%-electricity / 16→18 PJ figures here are 2014-vintage; current NZ end-use energy is already held by RD_024 / RD_007 (EECA EEUD) and RD_020 (RBS 2021). No new RT.
- Electric-water-heater efficiency register. The online comparison tool/register this framework proposes is the same trans-Tasman Energy Rating register already partly ingested (RD_025, URL_008) and pursued under RT_149. No new RT.
Research gaps
- None new. (The 2013/2015 E3 Consultation RIS behind the provisional cost-benefit figures could be retrieved to firm the economics, but those economics are AU-weighted and not NI-usable, so it is not worth a dedicated RT.)
Notes
Grey-literature government policy source (context: both, source_type: ot) — the trans-Tasman E3 Program’s 2018 consultation Policy Framework for hot-water systems, published by EECA. Filed as ot_ (a consultation/strategy framework, consistent with OT_074 MBIE Wood Energy Strategy and OT_081 MBIE Hydrogen Action Plan — proposed measures, not an enacted standard, so not reg_). Single-file PDF (28 pp), read in full via pdftotext -layout; every figure in Key claims traces verbatim to the cited printed page.
⚠ data_quality: medium, deliberately. Every stated figure is read directly from the raw, but the substance is (a) 2014-vintage Residential-Baseline-Study-derived NZ energy/emissions estimates and (b) explicitly “provisional… indicative only” cost-benefit economics that are mostly Australia-weighted and in AUD. It is contextual, not calibration-grade — do not promote any figure to a calculation input.
⚠ Cross-reference, not a duplicate, and NOT the RT_356 deliverable. No byte-SHA match in wiki/sources/; no content match for this specific 2018 E3 framework in the corpus (the many EECA/water-heating pages are distinct documents). It shares subject matter with the electric-water-heater register (RD_025 / URL_008, RT_149) and the DHW technology sources (OT_038 SR488, OT_041 Bulletin 689, OT_095 IEA SHC Task 69) but overlaps none of them — it is the policy/regulatory framing layer. Crucially it does not satisfy RT_356 (per-model AS/NZS 4234 yield listings), which stays open.
Connections
Links to
Sources (1): URL_008
Referenced by
EDT domains (1): D01: Renewable Energy & Storage Systems
Technologies (1): Solar-Direct PV Water Heating