Roof replacement only
Resolve roofing material, weatherproofing, structure and access. Generation can be deferred where solar is unsuitable.
SOLAR ROOFING / BUILDING + ENERGY
A roof that does more.
A decision worth modelling.
Compare the building envelope and the energy system together. A full reroof or new build opens options that a panel-only quote can miss.
Estimate my solar roof
THREE DISTINCT PATHS
Compare the whole project.
New roof + solar panels
Coordinate the reroof and a conventional array. Flexible placement and replacement often support the strongest capacity and value.
Integrated solar roof
PV elements form part of the finished roof. Best assessed during a new build or full reroof where architecture matters.
WHAT CHANGES ON THE ROOF
Three different assemblies.
Roof only
The roof covering provides weather protection. Solar generation is a separate future decision.
Roof + conventional panels
An array sits above the finished roof on a mounting system. The roof remains the weather barrier.
Integrated solar roof
Active PV elements form part of the roof finish. The complete assembly must resolve water, electrical and replacement access.
Agree the responsibility before choosing the finish.
Your written scope should name who owns roofing and waterproofing, PV and electrical work, manufacturer warranties, workmanship, and access for future replacement. Integrated roofing needs all of these resolved together.
INDICATIVE PROJECT SCREENCompare the roof and
Compare the roof and
energy pathways together.
Inputs, assumptions and inspection items remain separate. The result is deliberately a range—not a construction quotation.
YOUR ESTIMATE / NSW76 m²potential solar-active roof area
$35,000 – $57,000
Roof removal, selected finish and a broad access/complexity allowance. No solar generation included.
$56,500 – $93,000
Indicative roof replacement plus approximately 15.6 kW of conventional rooftop solar and electrical integration.
$61,500 – $125,500
Screening range for an active roof area supporting approximately 11.8 kW. Product availability and roof architecture must be verified.
CALCULATED11.8 kWindicative integrated capacity
CALCULATED16,492 kWhindicative annual generation
CALCULATED7,222 kWhbill-derived annual use
STARTING POINT15–25 kWh starting rangeinterval/load data improves sizing
See estimate basis and inspection items +
Customer inputs: postcode, roof area, material, condition, access, pitch, geometry, energy bill and preferences.
Screening allowances: roof replacement uses $0–$0 per m² before condition, access, pitch and geometry factors. Integrated active roofing uses a broad $500–$1,000 per m² allowance. Conventional solar uses $1,000–$2,000 per kW plus electrical allowances.
Calculated: usable roof share, indicative PV capacity, generation and three project ranges. Generation uses the CER postcode zone as a broad yield proxy.
Site inspection required: measured roof geometry, structure, waterproofing, hazardous materials, heritage/bushfire constraints, access, scaffold, drainage, switchboard, network approval, product availability and warranty interfaces.
NEXT RECOMMENDED STEPRoof, electrical and energy assessment
Send this estimate Nexen verifies the surface, usable solar zones, roof/electrical interface and the two pathways before issuing a project-specific design.
The details behind
the finish.
Generation
Conventional modules generally provide more watts from a smaller usable area. Integrated capacity depends on active roof coverage, orientation and shade.
Cost & lifecycle
Integrated roofing commonly carries a material and coordination premium. Assess it alongside roof replacement costs, access and future service work.
Waterproofing & warranty
Document roofing, membrane, drainage, waterproofing, PV, inverter and workmanship responsibilities separately within the coordinated scope.
Maintenance & compatibility
Resolve isolation, replacement access, batteries, EV charging, monitoring and network interfaces before installation.
Direct delivery
Nexen assesses, engineers, prepares, installs, commissions and supports the coordinated roofing and electrical project.