Solar has quickly shifted from an environmental extra to a genuine property investment question.
On 30 July 2026, the Ministry for Regulation released a review recommending that New Zealand legalise plug-in solar and simplify approvals for residential and small-to-medium solar installations.
This could make solar cheaper, quicker and more accessible for homeowners, businesses, renters and property investors.
However, the recommendations haven’t yet been implemented. Plug-in solar remains illegal under current New Zealand rules while the Government considers the required regulatory changes and safety standards.
Plug-in solar systems are smaller and simpler than traditional rooftop installations.
They generally include one or two portable panels and a microinverter. Instead of being permanently wired into the property’s electrical system, the unit connects through a standard power outlet.
These systems are commonly called balcony solar overseas because they can be used on balconies, terraces and other sunny areas where a full rooftop system may not be practical.
A typical unit supplements grid electricity rather than powering an entire home. Estimates cited by 1News suggest one could offset around 7% to 15% of an average New Zealand household’s daily electricity use.
Plug-in solar could be particularly useful for:
Investors and tenants shouldn’t purchase or connect a system until approved products, installation requirements and safety rules have been confirmed.
The Ministry’s review found that installing solar in New Zealand can involve multiple approvals, inconsistent information and unnecessary delays.
Its recommendations include:
If implemented, the changes could reduce the typical residential solar approval process from around three months and $640 to approximately six days and $200.
For small-to-medium installations, approval times could fall from six months to around one month. Costs could reduce from as much as $11,000 to approximately $1,300.
The Ministry estimates the full package could produce net benefits of between $28 million and $50 million over ten years. Read the Ministry for Regulation’s solar review
The value depends on the property, the tenancy model and who pays the electricity bill.
Lower household running costs could help a property stand out when tenants compare similar homes.
Solar may be particularly appealing to tenants who:
Solar won’t automatically justify higher rent, but it could support tenant demand, retention and the property’s overall appeal.
The investment case is usually strongest when the property owner pays some or all of the electricity bill.
This could include:
In these situations, the owner receives the power savings directly.
Solar is often easier to include during construction than retrofit later.
Developers can plan roof direction, wiring, inverter location, metering, battery space and electric vehicle charging from the beginning.
If the Ministry’s recommendations are adopted, clearer building and planning requirements could also reduce uncertainty for new developments.
A fully owned solar system with good warranties, installation records and proven electricity generation could appeal to future buyers.
However, investors shouldn’t assume spending $10,000 on solar will add $10,000 to the property’s value. The impact depends on the system’s age, quality and ownership, along with whether buyers value the expected power savings.
Potentially, although it may benefit tenants more directly than landlords.
A landlord could provide an approved plug-in system as part of the property, creating a lower-cost energy feature without paying for a complete rooftop installation.
It may be particularly useful for:
Important details still need to be confirmed, including how systems can be mounted, required safety features and whether network or retailer notification will be needed.
There will also need to be clarity around:
Legalisation wouldn’t necessarily give tenants an automatic right to install panels without the property owner’s permission.
Legalising plug-in solar wouldn’t automatically give apartment owners or tenants permission to install a system.
Unit-title properties are governed by the Unit Titles Act and their own body corporate operational rules. These rules can cover external appearance, common property, safety and the installation of equipment or fixtures.
Before installing solar, an owner would need to establish whether the balcony, roof, exterior wall or mounting point forms part of their unit or the common property. This is determined by the unit plan and may not always be obvious.
Body corporate approval could be required where a system:
If the work affects another unit or common property, written consent from the body corporate and affected owners may be required. Owners and tenants must also comply with the development’s operational rules. See the official guide to unit-title responsibilities
Tenants would generally need their landlord’s written permission and would still be bound by the body corporate rules. Legalisation would make approved systems possible, but it wouldn’t create an automatic right to mount one wherever the tenant chooses.
A body corporate may decide that a shared rooftop system is more suitable than separate balcony units. A shared system could supply electricity for lifts, lighting, security systems and other common services, with installation and maintenance managed collectively.
Investors considering an apartment or unit-title property should check:
Body corporate rules can be changed through the required owner decision-making process. Any new approach would need to balance access to solar with safety, insurance and the rights of other owners. Learn how body corporate operational rules work
In a standard residential tenancy, the tenant normally pays the electricity bill.
That means the landlord may pay for a rooftop system while the tenant receives most of the direct savings.
The upgrade could still improve tenant appeal or future saleability, but those benefits are harder to measure and aren’t guaranteed.
Before proceeding, investors should consider:
Solar also doesn’t replace an investor’s obligations under the Healthy Homes standards.
Most major New Zealand banks offer home energy loans at rates between 0% and 1%, usually as a top-up to an existing mortgage.
These products can cover improvements such as solar panels, batteries, insulation, heating and electric vehicle charging.
As at June 2026, EECA listed products from ANZ, ASB, BNZ and Westpac. Loan limits, repayment periods and eligibility differ, so investors should confirm whether the finance is available for rental or unit-title properties. Compare current home energy loans through EECA
The Green Party has separately proposed zero-interest clean-energy loans. That remains an election policy, while the Ministry for Regulation’s recommendations focus on removing regulatory barriers.
They are separate developments, and neither should be treated as confirmed financial support for investment properties.
Investors buying a property with an existing solar system should confirm:
An owned, well-documented and properly approved system is very different from an older installation with unclear ownership or outstanding finance.
The latest regulatory review makes solar more relevant to property investors.
The opportunity isn’t limited to plug-in solar. The wider recommendations could make traditional rooftop and small commercial installations faster, cheaper and easier to approve.
Solar is most likely to stack up when the owner pays for electricity, the property has strong daytime power use or the upgrade gives a development a genuine point of difference.
For a standard rental where the tenant pays for power, the return is less direct. The investor may benefit from tenant appeal, retention and future saleability, but those potential benefits need to be weighed against installation and finance costs.
Plug-in solar could eventually provide a cheaper middle ground for apartments and smaller rentals. Body corporate rules, property boundaries, safety requirements and insurance will still determine whether a system can actually be installed.
For now, plug-in solar remains illegal until the required regulatory and safety changes are completed.
Run the numbers on the actual property and use the rules and products available today. Solar should support the wider investment strategy, not simply look good on the roof.