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How Castle Hill compares with nearby suburbs

Estimated 6.6kW output uses each suburb's own sun-hours (derived from its latitude and climate zone), with the same rebate and tariff assumptions across the board.

SuburbEst. annual outputInstalled cost after rebatesEst. annual savings
Castle Hill this page9,255 kWh$2,200-$4,900$1,096-$1,466
Baulkham Hills9,255 kWh$2,200-$4,900$1,096-$1,466
Kellyville9,255 kWh$2,200-$4,900$1,096-$1,466
Cherrybrook9,255 kWh$2,200-$4,900$1,096-$1,466
West Pennant Hills9,255 kWh$2,200-$4,900$1,096-$1,466

Solar Panel Cost in Castle Hill, NSW

Castle Hill (2154) is a metro area in New South Wales with a warm temperate climate with good solar output. A 6.6kW solar system in Castle Hill costs $2,200 to $4,900 after all available rebates, generating approximately 9,255 kWh per year. Good solar conditions with moderate seasonal variation. Summer months will see peak production. A north-facing roof orientation is important to maximise output in the cooler months.

Castle Hill is in a metro area with strong competition among solar installers, which keeps prices competitive. Expect 3-5 quotes to range by $1,000-$2,000 for the same system.

With 4.52 average peak sun hours per day, a 6.6kW system in Castle Hill will generate approximately 9,255 kWh per year.

$2,200-$4,900
6.6kW after rebates
$5,800-$8,500
Before rebates
9,255 kWh
Annual output (6.6kW)
$1096-$1466
Annual savings

Recommended Solar Brands for Castle Hill

Jinko Solar

Budget-conscious homeowners wanting proven reliability at the best price

Efficiency: 22%Warranty: 25yrTier: budget
$900-$1300
per kW installed

LONGi

Homeowners wanting top-tier technology at a mid-range price point

Efficiency: 22.3%Warranty: 25yrTier: mid-range
$1000-$1500
per kW installed

Trina Solar

Those wanting a proven, bankable brand with strong warranty at a competitive price

Efficiency: 22.1%Warranty: 25yrTier: budget
$950-$1400
per kW installed

Canadian Solar

Homeowners wanting a non-Chinese headquartered Tier-1 brand at a competitive price

Efficiency: 22%Warranty: 25yrTier: mid-range
$950-$1350
per kW installed

SunPower

Homeowners wanting the absolute best panels with the longest warranty, especially on limited roof space

Efficiency: 22.8%Warranty: 40yrTier: premium
$1500-$2200
per kW installed

Frequently Asked Questions

How much does solar cost in Castle Hill?
A 6.6kW solar system in Castle Hill costs between $5,800 and $8,500 installed before rebates. After federal STCs and any New South Wales rebates, expect to pay $2,200 to $4,900. Larger systems (10kW+) cost more upfront but produce proportionally more electricity.
What rebates are available for solar in Castle Hill?
Castle Hill residents can access federal Small-scale Technology Certificates (STCs) worth $2,500-$3,800 depending on system size and climate zone. This is applied as a point-of-sale discount by your installer. NSW offers ESS certificates worth $400-$1,000 depending on system efficiency.
How much electricity will solar produce in Castle Hill?
With 4.52 peak sun hours per day, a 6.6kW system in Castle Hill will generate approximately 9,255 kWh per year. Good solar conditions with moderate seasonal variation. Summer months will see peak production. A north-facing roof orientation is important to maximise output in the cooler months.
What is the payback period for solar in Castle Hill?
Based on current electricity prices and feed-in tariffs in New South Wales, a 6.6kW system in Castle Hill will save $1,096-$1,466 per year. At an after-rebate cost of $2,200-$4,900, the payback period is typically 3-6 years.
What size solar system do I need in Castle Hill?
For an average Castle Hill household using 20-25kWh per day: a 6.6kW system covers most needs. Larger households (30kWh+) should consider 10kW or 13.3kW systems. If you have or plan to add an EV charger or heat pump hot water, size up. Your sunny climate means a standard-sized system will perform well.
What direction should solar panels face in Castle Hill?
North-facing is ideal for maximum annual output in Castle Hill. West-facing produces more in the afternoon (good if you use more power in the evening). East-facing produces more in the morning. Even a flat roof works well. Avoid south-facing if possible, as output can be 20-30% less than north-facing in New South Wales.

Related Guides

Heat Pump vs Solar Hot WaterComplete Rebates Guide

Also in Castle Hill

Heat Pump Hot Water Cost in Castle HillNew South Wales Solar Rebates

Nearby Suburbs

Baulkham HillsKellyvilleCherrybrookWest Pennant Hills
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