Specimen report — a sample household's figures, shown so you can see what you get. Not customer output.
WattMateWattMateHome energy assessment
Assessment report

Your home’s energy picture, and the systems that fit it

You told us about your home in Bayswater, with 4 people living in it, and you gave us enough of your energy use for us to work from your own numbers rather than a typical household.

Prepared for Sample household · Bayswater 6053

Produced 1 August 2026 · Document 00000000-0000-4000-8000-000000000000 · Contract 1.6.0 Customer edition

A copy of this report goes to the installers matched to your enquiry, along with the details you gave us. Their copy also carries your contact details, your budget range and your stated priorities so they can quote to your brief.

Modelled first-year saving
$1,806
Modelled cost before rebates
$12,253
Modelled payback
5.3 years
Assessment depth
17 of 22
sections built on your facts — the rest are listed below, not padded out
Where every figure comes from:You told usFrom your billSynergy published rateModelled from your answersAssumed — tell your installer if wrongAn assessment is only as deep as the answers behind it. Anything we could not stand behind is marked, or left out.

This assessment covered 17 of 22 sections

An assessment is only as deep as the answers behind it. The sections we could not fill are listed here rather than padded out.

What we looked atAssessed
Quick wins you can act on nowAssessed
What this report used, and where each figure came fromAssessed
Your energy useAssessed
Your electricity planAssessed
Rebates that apply to youAssessed
Your homeAssessed
Where panels and a battery would goNot assessed
Comparing your optionsAssessed
Carbon impactAssessed
How we worked this out, and what we did not assessAssessed
What your bill is actually made ofAssessed
Comparing the Synergy plans on your own usageAssessed
Your export credit positionAssessed
What your roof faces are worthNot assessed
The long view: break-even and beyondAssessed
What a battery would run in a blackoutNot assessed
Synergy's approved equipment checkNot assessed
Design extras that fit this homeAssessed
Your appliances — run, plan, or replaceAssessed
Your gas positionNot assessed
Your site in photosAssessed
01

What we looked at

So we concentrated on putting 10 kW of solar on the roof, and on the quick wins that cost you nothing to make.

Everything here is modelled from what you gave us. It is a starting position for talking to installers, not a site inspection.

What we focused on:

  • Putting 10 kW of solar on the roof
  • Moving your gas load onto electricity
  • Getting generation onto the roof
02

Quick wins you can act on now

Move the pool pump into daylight hours

The pump is usually the biggest movable load in a pool home. Running it between 9am and 3pm rather than overnight shifts it onto daytime generation.

Seal the draughts you already noticed

You told us the house has gaps. Door seals, weather strips and a chimney block are a weekend job and they cut the heating and cooling load every day of the year.

03

What this report used, and where each figure came from

Home typehouseAssumed — tell your installer if wrongThis is not one of your answers. We filled it in so the model could run. Tell your installer if it is wrong.
SuburbBayswaterYou told us
Postcode6053You told us
People in the home4You told us
Constructiondouble brickAssumed — tell your installer if wrongThis is not one of your answers. We filled it in so the model could run. Tell your installer if it is wrong.
Built1990sYou told us
Gas connectedYesYou told us
Electricity retailerSynergyFrom your bill
Yearly electricity use7,300 kWhFrom your bill
Yearly electricity spend$3,120From your bill
Flat-rate usage charge used in this report33.3 cents per kWhSynergy published rate
04

Your energy use

Your yearly use vs a typical Perth home
Your home7,300 kWhTypical Perth home6,570 kWh
Daily average20 kWhFrom your bill
Yearly total7,300 kWhFrom your bill
Yearly spend$3,120From your bill
Typical Perth home6,570 kWhModelled from your answers

Your home uses about what a typical Perth household uses.

The yearly figures here are your recent usage scaled to a full year, so seasonal swings are averaged rather than measured. A bill from the opposite season would sharpen them.

05

Your electricity plan

Plan on your bill: A1

When you use most powerNot stated — a typical Perth pattern, weighted to the eveningAssumed — tell your installer if wrongYou did not tell us when your household uses most power, so we used a typical Perth pattern to compare the plans. Answering that one question on the assessment page replaces this with your own.
Yearly cost on Home Plan (A1)$2,863Synergy published rate
Yearly cost on Midday Saver$2,884Modelled from your answersSynergy's published time-of-use prices, applied to the pattern we assumed for you.
Difference between the two$20Modelled from your answers
!
You did not tell us when your household uses most power, so this runs on a typical Perth pattern rather than yours. On that pattern Home Plan (A1) works out cheaper. A1 flat rate is the better fit for this usage pattern. Midday Saver would cost $20/year more because so much of the day's use lands in the 3pm-9pm peak band.

Prices used: the Synergy residential schedule in force from 1 July 2026, and the WA policy position last verified 31 January 2026. This report was produced on 1 August 2026. Check for a newer schedule before relying on these figures later.

06

Rebates that apply to you

Eligibility is confirmed against the equipment actually installed — not by this report.

From modelled price to your net — every step to scale
$17,171all items below−$2,753solar certificates−$918hot water certificates$13,500your netSolar is market-priced after certificates — that value is inside the first bar, not a separate step

The first bar is every line below added up before its rebate, so it is larger than the single path the summary leads with.

Rebates and certificates applied to the installed price
LineAmount
Federal certificates toward the 10 kW solar system
Modelled from your answers
$2,753
Federal certificates toward the heat pump hot water system
Modelled from your answers
$918

Rebate rules as at 31 January 2026. Eligibility is confirmed by your installer against the equipment actually installed, not by this report.

07

Your home

Add ceiling insulation

Uninsulated areas are one of the biggest year-round heating/cooling cost drivers in WA homes. See the savings range for your home in the insulation calculator.

Switch to heat pump hot water

Your gas hot water system is due for replacement. A heat pump unit is estimated to save ~$668/year, based on WA rates.

$668/yrmodelled

Seal draughts before upgrading heating or cooling

Draughts undercut any heating/cooling upgrade. Sealing gaps around doors and windows is usually the cheapest fix — see it alongside glazing options.

08

Where panels and a battery would go

Not assessed. You did not pace out any distances or send us photos, so there is nothing here we could stand behind. Your installer will work the placement out on site.
09

Comparing your options

Your answers pointed to one path rather than several, so that is what is here. An installer quoting your job will put up alternatives.

Solar only, about 10 kW

Leads on your brief

Covers the power your home uses through the day from your own roof, on the usage you gave us.

What it is
10 kW of panels
Cost after rebates
$7,000 to $13,000
Payback
3.9 to 7.2 years
Above WA's 5 kW export-payment cap, so exports earn nothing — savings counted from what you use yourself

What each price tier buys you

Typical Perth installed prices at this size, not quotes. We name no product: the make and model is your installer's call, and these bands are the standard to hold their quote against.

Entry level — $7,000 installed
Typical Perth band
Mid range — $9,500 installed
Typical Perth band
Premium — $13,000 installed
Typical Perth band

We are showing bands without brand names this time. The names belong to the approved-product catalogue, and we would rather show you nothing than a list we made up here.

10

Carbon impact

Carbon from your electricity now, each year
4,891 kg CO2
Carbon avoided if you act on this report
3,304 kg CO2 each year
The solar part counts only the generation your home uses itself. Surplus you export is left out, though it does displace emissions elsewhere on the grid.
Same as planting, each year
152 trees
11

How we worked this out, and what we did not assess

Solar output, system sizing, savings, payback and carbon all come from one shared calculation engine used across every WattMate tool, so the numbers here match the numbers there.

Electricity prices are the published Synergy residential rates in force from 2026-07-01. Rebate rules follow the WA policy position last verified on 2026-01-31.

Where a figure had no honest source we left it out rather than filling the gap. That is why some rows say nothing instead of showing a number.

This assessment goes as deep as the answers you gave it. The completeness count is the honest measure of that.

What this assessment did not cover

  • We did not visit your home. Nothing here is a site inspection, and nothing here clears any installation for compliance.
  • We did not measure your roof, its pitch, or what shades it.
  • We did not compare several system options against each other.
  • We did not establish the type of home, what the walls are made of. We assumed those so the model could run, and every one of them is marked as assumed in the list of inputs.
  • You did not tell us when your household uses most power, so the plan comparison ran on a typical Perth pattern rather than yours. It is marked as assumed beside the figures it produced.

WattMate is not an installer and does not carry out installations. This assessment is an estimate produced from the answers given, it is not a site inspection, it does not clear any work for compliance, and no saving in it is guaranteed. Confirm figures and eligibility with your installer and with Synergy before committing.

The evidence

Everything past this point is the working — the evidence behind each number above. You don't need it to decide; it's here so you can check us.

12

What your bill is actually made of

Read straight from the bill you uploaded — including the parts no solar system can change.

Your $3,120 electricity year, decomposed
Usage — $2,184$93670% usage — what a system can reduce30% fixed daily supply charge
!
$936 of your bill is the fixed daily supply charge — No solar system and no battery changes this line. Every saving figure in this report already leaves it out.
Your electricity year$3,120From your bill
Share of your bill that is fixed30%From your bill
Controlled loadNot on your billFrom your bill
ConcessionNot on your billFrom your bill
Feed-in creditNot on your billFrom your bill
How cleanly we read the billHigh — figures read cleanlyFrom your bill
Gas energy for the year18,000 MJFrom your bill
13

Comparing the Synergy plans on your own usage

How each plan charges across the day — width is hours, colour is price
Home Plan (A1)33.3¢ — the same price all dayMidday Saver~24¢~9¢~55¢~24¢midnight9am3pm9pmmidnight

Where your own use lands across these windows is what decides the figures below. Rates are re-checked at quote time.

Yearly cost of your usage on each plan
Home Plan (A1) — your current plan$2,863 a yearMidday Saver$2,884 a year
!
You are already on the cheaper plan for how you use power.
The gap between the plan you are on and the cheapest one is $0 a year. We treat a difference as worth acting on when it clears either $75 a year or 3% of the bill.

This flips once a battery is installed. Charging through the cheap middle of the day and discharging into the evening makes Midday Saver the stronger plan, on an assumption that a battery covers 80% of your evening import. We re-run this comparison at quote time.

Priced on the Synergy residential schedule in force from 1 July 2026. Assumed — tell your installer if wrong for the time-of-day pattern behind these figures.

14

Your export credit position

Working from: Solar only, about 10 kW.

Your inverter capacity against WA’s export-payment cap
Inverter capacity this rests on7.52 kWWA's export-payment cap — 5 kW
Inverter capacity this rests on7.52 kWModelled from your answersModelled from the array size at the standard maximum panel-to-inverter ratio. The inverter your installer actually proposes is what decides this.
WA's export-payment cap5 kWSynergy published rate
!
This size is above the cap, so it gives the export credit up. That is a trade, and it is only worth making if you use the extra power rather than export it.
  • Exported power earns nothing. The cap is a payment gate, not a limit on what the system generates.
  • Western Power's fixed export limit binds at your connection point instead.
We do not know whether your supply is single or three phase, and above the cap the consequences differ between them. Telling us which one you have settles the rest of this section.
15

What your roof faces are worth

Which way your roof faces decides how much a panel on it makes. We do not have a single face we could put a figure against, and nobody has looked at the roof, so there is nothing here we could stand behind.
16

The long view: break-even and beyond

On this modelling the system pays for itself in year 5.

Your system on the clock
Year 0 — installedYear 5 — pays for itselfYear 13 — replacement inverterYear 25
Saved by year 10, before the purchase price$21,330Modelled from your answers
Where you stand at year 10, after paying for it$11,830Modelled from your answers
Replacement inverter, allowed for$3,000 across 1 replacementModelled from your answersPriced at $300 per kW. It is a line you can see rather than a quiet deduction inside the total, because an inverter outlives its warranty and not its usefulness.
17

What a battery would run in a blackout

!
We will not put an hour count here. Confirm it with your installer against the battery they actually propose.
  • We do not have a usable capacity for the battery, and usable capacity is what runtime is made of.
  • We do not have a datasheet-verified backup profile for the battery. Plenty of batteries that genuinely back up a home sit in that state, which is exactly why a number here would be believed and wrong.
  • We do not know whether your supply is single or three phase, and that changes what a backup circuit can cover.

A home battery is not an uninterruptible power supply. There is a brief changeover gap when the grid drops, backup covers essential circuits rather than the whole switchboard, and it must never be relied on for life-support equipment. Tell your installer and Western Power if that applies to your household.

18

Synergy's approved equipment check

WA's battery scheme runs off Synergy's approved-products list, and the check is against the make and model actually installed. Nobody has proposed one yet, so this is a question for your quote rather than a finding about your home.

InverterWe do not know which inverter would be installed, so there is nothing to check yet.
Nothing proposed yet
BatteryWe do not know which battery would be installed either. The list is an inverter list, and a battery qualifies through the inverter it pairs with, so brand-matching a battery against it would produce a badge nobody earned.
Nothing proposed yet

Checked against the approved-products list as published 9 July 2026. Your installer confirms this against the equipment they actually quote, not this report.

19

Design extras that fit this home

The add-ons that genuinely change your numbers, and the ones that do not.

An EV charger

Tell us whether an electric car is on the horizon and this fills in.

Heat-pump hot water

$3,500 after rebates, saving $668 a year — payback 5.2 years. Assumptions: priced at WA electricity rates.

Heat-pump heating and cooling

Tell us how the house is heated and cooled and this fills in.

An induction cooktop

$1,500 after rebates, saving $120 a year — payback 12.5 years. Assumptions: we have not asked what your cooktop runs on, and inferred it from the gas connection; priced at WA electricity rates.

20

Your appliances — run, plan, or replace

ApplianceRheem 491315
Ageabout 4 years old
Costs to run$931 a year
Acting savesabout $605 a year
Replacing coststypically around $3,500, confirmed by your installer, for a heat pump hot water system

Replacing this now pays for itself in running costs before the old one would have died.

Run these numbers on your own usage

From the appliance scan

ApplianceOnga PPP1100
Ageabout 9 years old
Costs to run$532 a year
Acting savesabout $319 a year
Replacing costsabout $850 to $1,800 for a variable-speed pool pump

Replacing this now pays for itself in running costs before the old one would have died.

Run these numbers on your own usage

From the appliance scan

Replacement costs are general market guidance for a supplied-and-installed unit, not a quote for your home. Your own price depends on access, your switchboard, the brand you choose and the state of the existing installation. Figures as at August 2026.

21

Your gas position

WA gas is one of the few energy bills you can actually shop around on. We do not have enough about your gas use to price it yet, and the fixed daily charge — the part disconnection removes outright — is usually the biggest line in that case.
22

Your site in photos

Switchboard — photo 1
Photo 1 Switchboard · 1 Aug 2026
  • Main switch and RCDs are reachable without moving anything.
  • You told us: clear wall space beside the switchboard - yes
Battery wall — photo 2
Photo 2 Battery wall · 1 Aug 2026
  • Shaded wall, clear of the meter box.

Also on file, in your portal: Roof.

What happens next

WattMate is not an installer and doesn't carry out installations — we match you with accredited installers and hold their quotes to this report's standard.

1
This reportYour brief, sizes and shortlist — done.Done today
2
Between 1 and 3 installers quoteEach receives this assessment so quotes land pre-briefed.Usually within 24-48 hours
3
Site visitRoof measured, switchboard checked, placement finalised.
4
Install and connectionTypically one to two days on the tools, then Western Power approval.
5
Follow-throughWe re-run your tariff comparison once the system is live.
If no accredited installer covering your suburb can take the job right away, we keep looking and we tell you where things stand — you're never left guessing, and this report stays yours either way.
$
How WattMate makes money, plainly: We're independent — installers pay us a flat referral fee, never a percentage of your price. We're not the installer, this report isn't paid for by any installer, and no product in it earns us more than any other.
WattMate Certified seal

The gold WattMate Certified seal on an installer's profile is reserved for installers whose credentials and standing have been verified — it is earned, never decoration. If a profile doesn't carry it, ask why.

→
Ready for the next step? Your assessment travels with the enquiry, so the installers who quote have already read it.

WattMate is not an installer and does not carry out installations. This assessment is an estimate produced from the answers given, it is not a site inspection, it does not clear any work for compliance, and no saving in it is guaranteed. Confirm figures and eligibility with your installer and with Synergy before committing.