The Detail Behind
the Design.

Everything in this sheet supports the summary in your brochure — system sizing bands, indicative pricing structure, warranty terms, and the financing paths available for landed-home installations.

Recommended System Sizing

Avg. monthly SP bill	Recommended size	Est. monthly savings*	Est. bill after solar*
$300 – $450	6 kWp	$220 – $320	$80 – $180
$450 – $650	8 kWp	$320 – $420	$130 – $230
$650 – $900	10 kWp	$420 – $560	$230 – $340
$900 – $1,200	14 kWp	$560 – $760	$340 – $440
$1,200 – $1,600	18 kWp	$760 – $1,000	$440 – $600
$1,600+	22 kWp	$1,000 – $1,300	$600 – $900

*Estimates for guidance only, based on Q3 2026 SP Group tariffs (34.78¢/kWh incl. GST) and typical NER export credits (~26¢/kWh under the Simplified Credit Treatment, reviewed quarterly). Actual savings depend on roof orientation, shading, household consumption and system configuration.

System Coverage & Warranty

Component	Coverage
Solar panels	25-year performance warranty (rated output)
Inverter	10–12 year manufacturer warranty (model-dependent)
Installation workmanship	Covered under Helios installer warranty
Regulatory compliance	EMA generation licensing & SP Group NER registration handled end-to-end

Financing Options

Outright Purchase

Full upfront payment. Fastest payback (typically 3–6 years) since there's no financing cost layered on top of system cost.

Installment Financing

Spread the system cost over a fixed term through a financing partner, with monthly payments often comparable to your current electricity bill.

Solar Leasing

No upfront cost — pay a fixed monthly rate for the system while it generates savings from day one, with maintenance included.

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