Solar Installation and Power Purchase Agreements in New Zealand

Solar can look simple on the sales sheet, lower power bills, no large upfront capital spend, and a provider who says they will handle the rest. The legal reality is usually more detailed. Businesses often sign before checking who owns the panels, what happens if the system underperforms, whether the site lease allows the installation, or how the pricing formula actually works over a 10 to 20 year term.

Another common mistake is relying on headline savings without reading the maintenance, access, termination and make good clauses. Some businesses also assume a solar installation contract and a power purchase agreement are the same document, when they often deal with different risks.

If you are considering onsite solar for your premises in New Zealand, this guide explains what a solar installation & power purchase agreement usually covers, the legal issues to review before you sign, and the mistakes that tend to cause trouble later.

Overview

A solar installation & power purchase agreement is usually a package of contracts dealing with the design and installation of a solar system, the supply of electricity generated by that system, and the parties' rights over the equipment during the term. The right structure depends on whether you are buying the system outright, leasing it, or buying solar power from a third party that owns and operates the equipment on your site.

• who owns the panels, inverter, meter and related equipment
• whether you are signing one contract or a suite of connected agreements
• how the electricity price is calculated, reviewed and invoiced
• performance promises, generation assumptions and exclusions
• who handles maintenance, repairs, insurance and site access
• what landlord, lender or body corporate consents are needed
• what happens if you sell the business, move premises or redevelop the site
• termination rights, exit payments and make good obligations at the end of the term

What Solar Installation & Power Purchase Agreement Means For New Zealand Businesses

For most New Zealand businesses, a solar installation & power purchase agreement is not just an energy deal. It is a long term commercial contract that affects your premises, your operating costs and your flexibility to move or restructure later.

The phrase can describe a few different arrangements. That matters because the legal and commercial risks shift depending on the model.

Outright purchase and installation

If you buy the system outright, the key agreement is usually an installation contract. You pay for the design, supply and installation of the system, then you own the equipment and use the electricity it produces.

Your main legal concerns are contractor obligations, installation standards, defects liability, warranties, commissioning, and whether the system actually performs as promised.

Lease or rental style model

Some providers offer a lease, rental or financed arrangement. In that structure, the provider or financier may keep ownership of the equipment while you make regular payments for use of the system.

The legal focus then expands beyond installation quality. You also need to check payment obligations, security interests, end of term options, and what happens if the equipment fails but payments continue.

Power purchase agreement, or PPA

Under a PPA, a third party generally installs, owns and maintains the solar system on your site, and you agree to buy the electricity it generates at a set or formula based price. This can appeal to businesses that want solar benefits without the upfront capital cost.

The important point is simple: you may not own the system at all. Instead, you are committing to buy power over a long period, often with minimum commercial commitments and detailed access rights for the system owner.

Why founders and SMEs need to slow down before they sign

The savings case often looks persuasive, especially for businesses with large daytime loads such as hospitality venues, manufacturers, warehouses, offices and retail sites. But these contracts are usually drafted to lock in revenue for the provider over many years.

This is where business owners often get caught. They focus on the projected savings and not the legal assumptions underneath them.

Before you accept the provider's standard terms, check whether the proposal depends on assumptions such as:

• your site remaining in use for the full term
• your energy consumption staying above a certain level
• no major roof repairs or redevelopment works being needed
• the provider having ongoing access to the roof, switchboard and metering equipment
• your landlord consenting to the installation and any related rights
• export arrangements, network settings or metering assumptions remaining suitable

In New Zealand, these projects also sit inside ordinary commercial law obligations. The contract terms must be clear, your marketing and savings claims should not be misleading, and services supplied to a business customer can still raise disputes about reasonable care, skill and fitness for purpose depending on how the contract is written and the surrounding facts.

If the provider is making strong statements about savings, resilience, output or payback, those claims should match the written contract. A verbal promise from the sales process is much harder to enforce later if the final documents are silent or contradictory.

Legal Issues To Check Before You Sign

The main legal issue is allocation of risk. Before you sign a solar installation or PPA package, you need a careful contract review to see who carries the risk if the system underperforms, access is interrupted, the roof needs work, or your business needs to leave the site.

1. Contract structure and document priority

Many deals involve more than one document. You might see a proposal, technical scope, installation terms, a PPA, maintenance terms, finance documents, guarantees and annexures.

Make sure the contract says which document takes priority if there is a conflict. Without that, a polished proposal can promise one thing while the legal terms quietly say another.

Check that the final signed package clearly covers:

• the technical specification of the system
• the installation timetable and completion process
• testing and commissioning requirements
• pricing and invoicing terms
• ownership of equipment and generated electricity
• maintenance and response times
• end of term removal or transfer arrangements

2. Ownership, security interests and title to equipment

You should know exactly who owns each part of the system throughout the contract term. In a purchase model, ownership may transfer on payment. In a PPA, the provider usually keeps title to the equipment.

This is not just an academic point. Ownership affects who insures the equipment, who can remove it, and what rights a financier may claim if the provider has borrowed against the assets.

If a third party owns the system, ask whether any security interest is registered or intended to be registered over the equipment. That can matter if you refinance, sell the business, or face a dispute over assets fixed to the premises.

3. Site rights and landlord consent

If you lease your premises, landlord consent is often a major issue. A provider may need rights to install equipment on the roof or elsewhere on the site, enter the premises for maintenance, and leave assets in place for years.

Before you spend money on setup or due diligence, review your commercial lease. Check for restrictions on alterations, rooftop equipment, penetrations, assignment, access rights and make good obligations.

You may need written consent that deals with matters such as:

• approval for installation works and equipment location
• provider and contractor access rights
• responsibility for roof damage or waterproofing issues
• insurance arrangements
• removal obligations at lease end
• rights if the landlord wants to repair, replace or redevelop the building

If the site is part of a larger development or body corporate structure, extra approvals may be needed.

4. Performance standards and generation promises

Projected output is one of the most disputed parts of a solar deal. You want the contract to distinguish clearly between estimates, minimum performance commitments and circumstances that excuse underperformance.

Check what the provider is actually promising. A sales model may show expected annual generation, but the legal terms might say those figures are indicative only.

Before you rely on a verbal promise, confirm in writing:

• whether there is a guaranteed output or availability level
• how performance is measured
• what data source controls if readings differ
• what remedy applies if the system misses the target
• what exclusions apply, such as shading changes, weather conditions, grid outages or customer caused downtime

5. Price, indexation and billing mechanics

In a PPA, the electricity price clause deserves close attention. A low starting rate can become less attractive if annual escalators, floor prices, minimum purchase obligations or complicated true up mechanisms are hidden in the drafting.

Look closely at:

• the initial tariff and whether it is fixed or variable
• indexation or annual price step ups
• how imported grid electricity and exported electricity are treated
• metering methodology and dispute resolution for meter errors
• billing periods, due dates and late payment charges
• whether you must buy all generated electricity or only what you consume

If financial savings are central to the decision, have the commercial model checked carefully. Your accountant or energy adviser can help with assumptions, while a lawyer can test whether the written terms reflect them properly.

6. Installation risk, delays and defects

The installation phase creates practical business risks. Roof access, electrical shutdowns, health and safety coordination, weather delays and subcontractor performance can all affect your operations.

The contract should deal with who is responsible for:

• obtaining permits, approvals and network related requirements where applicable
• site safety and contractor management
• damage to the building, roof membrane or existing electrical systems
• delays caused by missing information or restricted access
• rectifying defects after commissioning

If your site cannot tolerate downtime, include a clear process for planned outages and notice periods.

7. Maintenance, repairs and access

Solar systems are not install and forget assets. In a PPA especially, the provider will usually need ongoing access for inspection, maintenance and replacement of components.

Check how often access is allowed, what notice must be given, and whether emergency access is defined narrowly enough. You should also make sure maintenance obligations are tied to service levels, not just broad discretion.

For example, the agreement should state who pays if an inverter fails, how quickly faults must be addressed, and whether you receive any pricing adjustment or credit during prolonged outages.

8. Insurance and liability

Insurance terms often get skimmed over, but they matter when equipment is mounted on valuable premises. The contract should spell out who insures the system, who insures the building, and how each party's liability is capped.

Pay attention to exclusions and liability clauses. Broad indemnities can shift unexpected risk to the customer, especially for roof damage, third party claims or business interruption.

Liability caps should be commercially sensible. A provider should not have unlimited rights against you while limiting its own liability to a very small amount.

9. Term, termination and end of term outcomes

The exit clause is where long term deals either stay manageable or become painful. Before you sign, map out what happens if you relocate, sell the business, close a site, or want the system removed early.

Key points include:

• the contract term and renewal process
• termination rights for breach, insolvency, prolonged force majeure or underperformance
• early termination charges and how they are calculated
• assignment rights if you sell the business or transfer the lease
• purchase options at the end of the term
• equipment removal and make good obligations

A low entry cost can be offset by a very expensive exit formula. This deserves specific attention.

Common Mistakes With Solar Installation & Power Purchase Agreement

The most common mistake is treating the provider's proposal like a straightforward utility quote. It is usually a detailed commercial contract that can affect your site and operations for years.

Signing without matching the deal to the premises arrangement

Businesses regularly sign before checking their lease term. If your lease expires in three years but the PPA runs for fifteen, you may be left with assignment issues, relocation costs or termination charges.

If you do not own the property, align the solar contract with the occupancy document first.

Assuming projected savings are guaranteed

Forecasts are often based on assumptions about weather, load profile, shading and power prices. If the contract turns those figures into non binding estimates, you may have little recourse if reality falls short.

Ask what is guaranteed, what is estimated, and what remedy applies if targets are missed.

Ignoring roof condition and building works

A roof near the end of its life can turn a solar project into a logistics and cost problem. If the roof needs repair or replacement during the term, the contract should say who removes and reinstalls the equipment, and at whose cost.

This is especially important for warehouses, older retail sites and premises with planned redevelopment.

Relying on verbal sales statements

This is where founders often get caught. A salesperson may say the system will cover a set percentage of your usage, maintenance is fully included, or you can exit if you move.

If that is not reflected in the signed contract, proving the promise later can be difficult. Put commercial assumptions into the agreement itself or an expressly binding schedule.

Overlooking access and operational disruption

Access clauses can be wider than expected. A provider may reserve rights to enter the site at broad times or on short notice.

If you operate a controlled facility, food premises, busy retail site or secure warehouse, the agreement should fit your access protocols and business hours.

Not checking who bears damage and make good costs

Panel mounting, cabling and roof penetrations can create disputes long after installation. If damage appears later, parties often disagree about whether it was caused by the installation, ordinary wear, or another contractor.

Spell out responsibility for installation damage, reinstatement and end of term make good. Vague drafting usually benefits the party that wrote it.

Accepting one sided liability caps

Some standard form agreements cap the provider's liability tightly while leaving the customer's indemnities broad. That imbalance may be commercially unacceptable if the provider controls design, equipment and maintenance.

Caps, exclusions and indemnities should reflect who controls the relevant risk.

FAQs

Is a solar installation contract the same as a power purchase agreement?

No. An installation contract usually covers design and construction of the system. A PPA usually covers the ongoing sale of electricity generated by a system that the provider owns and operates.

Do I need landlord consent before installing solar at leased premises?

Often, yes. If the system is being attached to the building or roof, your lease will commonly require landlord approval for alterations, access arrangements and end of term make good.

Who owns the solar equipment under a PPA?

Usually the provider or a related financier owns the equipment during the term, not the customer. The contract should state this clearly, along with any end of term purchase option or removal process.

What happens if the system does not generate as much power as promised?

That depends on the contract. Some agreements only give estimates, while others include a performance guarantee with credits, repair obligations or other remedies if output or availability falls below a stated level.

Can I transfer the agreement if I sell my business or move sites?

Sometimes, but not automatically. Check the assignment, novation and early termination clauses before you sign, especially if your business may relocate, restructure or sell within the contract term.

Key Takeaways

• A solar installation & power purchase agreement can involve multiple connected contracts, not just one simple supplier form.
• The biggest issues are ownership of equipment, price mechanics, performance commitments, maintenance obligations, access rights and exit costs.
• If you lease your premises, landlord consent and lease alignment should be checked early, before you sign or commit to installation works.
• Projected savings are not the same as contractual guarantees, so match sales statements against the legal documents.
• Termination, assignment and make good clauses matter just as much as the headline power price.
• Clear drafting around defects, roof damage, insurance, liability caps and end of term removal can prevent expensive disputes later.

If you want help with contract review, landlord consent issues, performance and pricing clauses, or termination and exit terms, you can reach us on 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.