Gridly
VIC 3934 · Mornington Peninsula
Solar Panel Installation in Mt Martha, VIC
Find a vetted solar installer in Mt Martha. Compare quotes, check local solar data, and get a system designed for your roof.
Get Free Solar QuotesSolar Snapshot for Mt Martha
Key data for sizing a solar system in Mt Martha, VIC 3934.
19,846
Population
3.8/day
Peak Sun Hours
7,323
Est. Annual Output (6.6 kW)
$1,058
Est. Annual Savings
3.8 yrs
Est. Payback (6.6 kW)
$2,808
STC Rebate (6.6 kW)
Zone 3
Dwelling Mix in Mt Martha
Breakdown of dwelling types based on census data — relevant for understanding rooftop solar potential.
Houses
84%
5,916 dwellings
Townhouses
15%
1,084 dwellings
Apartments
0%
20 dwellings
Mt Martha is predominantly freestanding houses, ideal for rooftop solar installation.
Solar Adoption in Mt Martha 3934
Installation data from the Clean Energy Regulator, current to May 2026.
3,126
Solar Systems Installed
Since 2001
6.4 kW
Avg System Size
20.0 MW
Total Installed Capacity
280
Battery Systems
Mt Martha (3934) has 3,126 registered solar panel installations with a combined capacity of 20.0 MW. The average system size in this postcode is 6.4 kW. That's roughly 17% of dwellings with rooftop solar.
Installations fell 16% in 2025 compared to 2024's 207 systems.
Is Solar Worth It in Mt Martha?
Mt Martha gets 3.8 peak sun hours per day — slightly below the national average. A 6.6 kW system here would produce roughly 7,323 kWh per year, saving an estimated $1,058 annually and paying itself off in 3.8 years.
At $3,992 after rebates, the upfront cost represents 4% of Mt Martha's median household income ($109,044/year). A relatively small outlay for a 20+ year asset that generates returns from day one.
Around 17% of dwellings in Mt Martha have solar, below the Victoria average of 28%. This means there's significant room for more installations — and early adopters tend to benefit most from current rebate levels before they taper off.
With a payback under 4 years and 20+ years of remaining system life, solar in Mt Martha is one of the stronger return-on-investment cases in Victoria. The question isn’t really whether solar is worth it here — it’s what size system to get.
Why Install Solar in Mt Martha?
Mt Martha receives 3.8 peak sun hours daily. While this is lower than northern states, a well-sized system still generates significant savings. A 6.6 kW system can produce around 7,323 kWh per year, saving approximately $1,058 annually.
Mt Martha has a population of 19,846 across 18,531 dwellings. Victoria's growing electricity costs, currently around 32c/kWh, make solar a practical way to reduce household bills.
The median household income in Mt Martha is $109,044 per year. At $3,992 after rebates, a 6.6 kW system represents 4% of annual household income, with savings that continue for 20+ years after the 3.8-year payback.
With car ownership at 97% of households, many residents in Mt Martha could benefit from pairing solar with a home EV charger. Charging an electric vehicle from rooftop solar can save $1,000 to $1,500 per year compared to grid charging.
Estimated Solar Output & Payback in Mt Martha
Based on 3.8 peak sun hours/day, 32c/kWh electricity, and STC Zone 3 rebate.
| System Size | Annual Output | Annual Savings | Cost After Rebate | Payback |
|---|---|---|---|---|
| 5 kW | 5,548 kWh | $802 | $2,955 $2,145 STC rebate | 3.7 yrs |
| 6.6 kW Most popular | 7,323 kWh | $1,058 | $3,992 $2,808 STC rebate | 3.8 yrs |
| 10 kW | 11,096 kWh | $1,603 | $5,810 $4,290 STC rebate | 3.6 yrs |
| 13 kW | 14,425 kWh | $2,084 | $7,523 $5,577 STC rebate | 3.6 yrs |
Estimates assume 80% system efficiency, 35% self-consumption rate, 5c/kWh feed-in tariff, and STC Zone 3 ($39/STC, 8-year deeming period). Actual results vary based on roof orientation, shading, and usage patterns.
Solar Rebates in Victoria
Available incentives that reduce the cost of solar installation in VIC.
Solar Homes Program offers up to $1,400 rebate on solar panel systems for eligible households.
STCs provide an additional $2,500 to $4,000 upfront discount depending on system size.
Popular Solar Panels
Top-rated panels available for installation in Mt Martha.
Solahart Silhouette Series
455W, 22.8% efficiency
$165
Solahart SunCell Series
440W, 22% efficiency
$140
Canadian Solar TOPHiKu 6
440W, 22.5% efficiency
$130
Trina Solar Vertex S+
440W, 22% efficiency
$120
How Solar Installation Works
Site Assessment and Quote
An installer visits your property, assesses your roof, checks shading, and provides a detailed quote based on your energy usage.
System Design and Approval
Your system is designed to maximise output. Council approval may be needed for heritage properties, but most residential installs are exempt.
Installation
A residential solar installation typically takes one day. The team mounts panels, installs the inverter, and connects the wiring.
Grid Connection and Meter
Your installer lodges paperwork with your distributor. Once approved, your meter is upgraded to a bi-directional meter and you start exporting.
Frequently Asked Questions
How many peak sun hours does Mt Martha get? ▼
Mt Martha receives approximately 3.8 peak sun hours per day, based on its cool climate zone. This means a standard 6.6 kW system can generate around 7,323 kWh annually.
What size solar system do I need in Mt Martha? ▼
The right system size depends on your electricity usage. Average household consumption in Victoria is 15 to 19 kWh per day. A 6.6 kW system suits most homes, while larger households or those with pools or EV chargers may benefit from a 10 kW or 13 kW system.
How much does solar installation cost in Mt Martha? ▼
A 6.6 kW solar system in Mt Martha costs approximately $8,200 before rebates. Mt Martha is in STC Zone 3, which provides a rebate of $2,808 on a 6.6 kW system. An additional $1,400 state rebate applies. After rebates, expect to pay around $3,992.
What is the payback period for solar in Mt Martha? ▼
A 6.6 kW solar system in Mt Martha has an estimated payback period of 3.8 years, based on 3.8 peak sun hours per day and annual savings of $1,058. After the payback period, the system continues generating free electricity for its remaining 20+ year lifespan.
Do I need council approval for solar in Mt Martha? ▼
In Victoria, most residential solar installations do not require a planning permit. Heritage overlays or specific planning zones in Mornington Peninsula may have restrictions. Your installer will check this during the quoting process.
How Mt Martha Compares to Nearby Suburbs
Solar potential compared with neighbouring suburbs in the Mornington Peninsula area.
| Suburb | Sun Hours | 6.6 kW Output | Payback | Solar Adoption |
|---|---|---|---|---|
| Mt Martha 3934 | 3.8h | 7,323 kWh | 3.8 yrs | 17% |
| Flinders 3929 | 3.8h | 7,323 kWh | 3.8 yrs | 49% |
| Hastings 3915 | 3.8h | 7,323 kWh | 3.8 yrs | 16% |
| Mornington 3931 | 3.8h | 7,323 kWh | 3.8 yrs | 16% |
| Rosebud 3939 | 3.8h | 7,323 kWh | 3.8 yrs | 19% |
All estimates assume a 6.6 kW system. Sun hours, output, and payback are based on the same methodology. Solar adoption shows CER-registered installations as a percentage of dwellings.
Nearby Suburbs
Solar installers in suburbs near Mt Martha.
Related Products
Solar output estimates use Bureau of Meteorology irradiance data and assume north-facing panels with no shading. Population and dwelling data: ABS 2021 Census. Electricity rates are state averages and may differ from your retailer's pricing. Get a personalised quote for accurate savings.