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Home Planning Tools

Home Solar & Battery Estimator

Estimate yearly savings, self-consumption and payback for rooftop solar and a home battery, with the certificate discount worked out for postcode 2563.

Illustration: Cut-paper modern two-storey home with rooftop solar panels and a battery against inland paddocks.
What this estimates: yearly output for an unshaded roof at Menangle Park from the European Commission's solar radiation data, the small-scale technology certificates (STCs) a system in postcode 2563 can create under the Clean Energy Regulator's rules, and savings at the electricity prices you enter, starting from the AER's 2026/27 reference prices for the Endeavour Energy area. Sources were read on 9 October 2026. System and battery prices come from your own quotes; this page does not estimate them.
Estimated saving
$2,640-78% / yr
PaybackAdd quotes
Self-Consumption76%
Net cost after STCsAdd quotes

1. Electricity Bill & Household Usage

Endeavour Energy area
$
$200 / qtr$1,000$1,800$2,500+

Starts at $582 a quarter: the AER's 2026/27 reference bill for a flat-rate household in the Endeavour Energy area, $2,328 a year for 4,900 kWh. Enter your own bill.

2. Solar System Size

kW
3 kW6.6 kW10 kW15 kW

For an unshaded roof. Shade from trees, a second storey or the house next door lowers it.

$

3. Home Battery (Optional)

$
Electricity prices and the certificate price

Endeavour Energy runs the poles and wires here; your retailer sets the prices you pay. The figures start at the AER's 2026/27 Default Market Offer for a flat-rate household in the Endeavour Energy area and IPART's 2026/27 feed-in benchmark. Enter the figures from your own bill.

$
AER 2026/27 reference: 33.73¢ incl. GST
$
IPART 2026/27 benchmark: 3.4¢–6.5¢ (starts near the middle)
$
AER 2026/27 reference: $1.85 a day incl. GST
$
An example. Certificate prices move; your quote shows the discount your installer gives.

What applies in Menangle Park

Export limits

Menangle Park is on Endeavour Energy's network. Endeavour says flexible exports become the default connection for eligible new and upgraded solar systems from November 2026, allowing up to 10 kW per phase to be exported most of the time. Postcode 2563 is in the first stage of the NSW CER Installer Portal and emergency backstop rollout, from 2 November 2026.

A customer who opts out goes on a fixed export plan capped at 1.5 kW. Solar used in the home or stored in a battery does not count towards an export limit. This estimate does not apply a limit.

The estate's Design Guidelines

Each stage has its own Design Guidelines, which form part of the land contract, and the Design Administrator assesses a design before Council or a certifier does. The guidelines set pitched roofs of at least 22.5 degrees, which is the pitch used for the output figures above.

Check your stage's guideline before placing panels or a battery. How building approvals work here sets out both steps.

Certificates fall each year

Postcode 2563 is in solar zone 3, rated 1.382. A solar system installed in 2026 can create certificates for a 5-year deeming period, falling by a year each year to 1 year in 2030. The battery factor is 6.8 per kWh for a battery installed from May to December 2026 and 5.7 from January to June 2027.

The installation date sets the number, not the date you sign. This page uses today's date.

Sources, read on 9 October 2026:Clean Energy Regulator, postcode zone ratings;Clean Energy Regulator, battery eligibility;Clean Energy Regulator, deeming periods and battery STC factors;European Commission Joint Research Centre, solar output for Menangle Park;AER, Default Market Offer 2026–27 final determination;IPART, solar feed-in benchmark 2026–27;Endeavour Energy, flexible exports. The model's own assumptions: solar used directly is 32%, 42% or 52% of the household's use for the three daytime patterns, up to 55% of output; a battery uses 90% of its capacity on 335 days a year with 90% round-trip efficiency. Charging losses reduce the electricity available for export.
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