For many New Zealand businesses, electricity is a significant ongoing operating expense. If your building uses substantial power during daylight hours, commercial solar panels can generate electricity on-site and reduce the amount of power you need to purchase from the grid.
But installing solar is not simply a matter of covering a roof with as many panels as possible. The right system depends on your electricity consumption, operating hours, roof space, shading, electrical infrastructure, budget and future energy requirements.
This guide explains how commercial solar works in New Zealand, what affects installation costs, how businesses can assess potential returns, when batteries make sense and what to consider before choosing a solar provider.
Why Are NZ Businesses Switching to Commercial Solar?
Commercial solar allows a business to generate electricity where it is used. This can reduce purchases from the electricity grid, particularly when a business has significant daytime energy demand.
Solar is also increasingly being considered alongside battery storage and other energy technologies. The Electricity Authority recognises solar panels and business batteries as forms of distributed generation that can supply electricity close to where it is consumed.
Businesses may consider commercial solar for several reasons:
- Reduce reliance on purchased grid electricity
- Generate electricity during business operating hours
- Make better use of suitable roof or ground space
- Support renewable-energy objectives
- Combine solar with battery storage
- Improve energy resilience when paired with suitable backup systems
- Prepare for increasing electricity demand from equipment or EV charging
For businesses, the most important question is not simply how much electricity solar panels can generate. It is how much of that electricity the business can use effectively.
For a commercial solar solution designed around your site and energy requirements, see Cybotix Commercial & Government Solar.
How Do Commercial Solar Panels Work?
A commercial solar PV system converts sunlight into electricity using photovoltaic panels. The electricity is then converted through an inverter so it can be used by the building’s electrical system.
A typical grid-connected commercial solar system includes:
- Solar panels – capture sunlight and produce DC electricity.
- Inverters – convert DC electricity into AC electricity used by the building.
- Electrical protection and equipment – safely connect the system to the site’s electrical infrastructure.
- Monitoring equipment – allows system performance to be monitored.
- Grid connection – enables the business to remain connected to the electricity network.
- Optional battery storage – stores surplus solar energy for later use.
During the day, solar electricity can supply the building’s electrical loads. If the system generates more electricity than the business is using at that moment, the surplus may be exported to the electricity network, subject to the applicable connection and export arrangements.
The Electricity Authority confirms that businesses can generate electricity for their own use and sell excess electricity back to the grid, with connection and metering requirements applying.
Solar PV vs Solar + Battery Storage
A standard solar PV system and a solar-plus-battery system serve different purposes.
| Feature | Solar PV | Solar + Battery |
|---|---|---|
| Generates electricity during daylight | Yes | Yes |
| Uses solar power on-site | Yes | Yes |
| Stores surplus solar | No | Yes |
| Can shift solar energy to later periods | Limited | Yes |
| Higher upfront investment | Generally lower | Generally higher |
| Potential resilience benefits | Limited | Greater, depending on system design |
| Suitable for high daytime loads | Often | Often |
| Suitable for shifting energy to evening use | Limited | Better suited |
A battery does not automatically make every commercial solar project more economical. Its value depends on the site’s electricity profile, tariff structure, solar generation and the specific battery system.
For businesses considering integrated solar and resilience solutions, see Cybotix Off-Grid, Microgrid & Resilience Solutions.
How Much Solar Power Does a Business Need?
There is no universal solar system size for a commercial building. The appropriate capacity should be based on the site’s electricity consumption and physical characteristics.
Key factors include:
- Annual electricity consumption
- Daytime electricity usage
- Business operating hours
- Roof size and orientation
- Roof condition and structural suitability
- Shading from buildings, trees or other structures
- Available ground space
- Existing electrical infrastructure
- Local solar conditions
- Future electricity requirements
- Battery storage requirements
- Grid connection limitations
The Electricity Authority recommends evaluating your energy use and comparing your consumption with potential solar output before choosing a system.
Example: A Warehouse With Daytime Electricity Demand
Consider a warehouse that operates primarily during daylight hours and has substantial electricity demand from lighting, refrigeration, machinery or other equipment.
A solar system may be able to supply a meaningful portion of the site’s daytime electricity requirements. Instead of designing purely around the maximum possible panel capacity, the system can be assessed against the warehouse’s actual load profile.
This approach can help determine:
- How much electricity can be consumed directly from solar
- How much surplus generation may occur
- Whether battery storage could be useful
- Whether grid export is required
- Whether the existing electrical infrastructure can accommodate the system
The exact system size and expected generation should always be calculated using the property’s electricity data and a site-specific assessment.
What Happens to Excess Solar Power?
If solar generation exceeds the building’s immediate electricity demand, the surplus electricity may be exported to the local network if the system and connection allow it.
However, businesses should not assume that every kilowatt-hour generated will have the same value.
A commercial solar assessment should consider:
- How much electricity is consumed during solar-generation hours
- The site’s import electricity rates
- Export rates available from the electricity retailer
- Network connection requirements
- Export limitations
- Whether batteries could increase self-consumption
New Zealand’s distributed-generation rules and network arrangements continue to develop, so larger commercial projects should be assessed against the requirements that apply to the specific connection.
How Much Do Commercial Solar Panels Cost in New Zealand?
Commercial solar costs vary significantly from one project to another. A small office rooftop installation and a large industrial system can have very different equipment, engineering, electrical and installation requirements.
The main cost factors include:
- Number and type of solar panels
- Total system capacity
- Inverter requirements
- Battery storage
- Roof type and accessibility
- Structural requirements
- Electrical switchboard upgrades
- Cabling and protection equipment
- Monitoring equipment
- Installation complexity
- Grid connection requirements
- Site location
- Engineering and project management
For this reason, businesses should be cautious about relying on a single generic “$ per kW” figure when assessing a commercial solar investment.
A professional proposal should explain what is included in the system and clearly identify any additional electrical, structural or connection work.
Commercial Solar Payback and ROI
The financial return from commercial solar depends on how the system is used rather than simply how many panels are installed.
A basic assessment should consider:
Solar investment ÷ annual financial benefit = simple payback period
However, the annual benefit needs to account for the factors that actually apply to the business.
These can include:
- Electricity purchased from the grid that is replaced by solar
- Electricity exported to the grid
- Applicable export payments
- Battery operation
- System operating costs
- Financing costs
- Maintenance
- Future electricity consumption
- Changes in electricity prices
A business with significant daytime electricity consumption may be able to use a large proportion of its solar generation directly. A business that operates mainly at night may have a different business case and could benefit from considering battery storage.
The Electricity Authority notes that solar can help businesses reduce energy costs and that batteries can store generation for use when the sun is not shining.
What Are the Benefits of Commercial Solar for NZ Businesses?
Commercial solar can provide financial and operational benefits, but the results depend on the individual site and system design.
Reduce Grid Electricity Purchases
The electricity generated by your solar system can be used by your business instead of purchasing the same amount from the electricity network.
The greater the amount of solar electricity that can be used directly on-site, the more important the business’s daytime load profile becomes.
Support Energy Resilience
Solar can form part of a wider energy-resilience strategy, particularly when combined with battery storage and suitable backup controls.
However, a standard grid-connected solar system should not automatically be considered backup power during a blackout. The system needs to be specifically designed for backup or islanded operation if that capability is required.
Support Sustainability Objectives
Businesses may also use commercial solar as part of broader sustainability and renewable-energy initiatives.
Rather than relying on general environmental claims, businesses should look at their actual electricity consumption and measure how much electricity the proposed solar system is expected to generate.
Is Commercial Solar Worth It for Your Business?
Commercial solar can make sense when a business has suitable solar exposure, meaningful electricity consumption and a sufficiently long investment horizon.
It is particularly worth investigating if your business:
- Uses significant electricity during the day
- Owns or controls a suitable building
- Has sufficient roof or ground space
- Has a relatively predictable electricity load
- Wants to reduce grid electricity purchases
- Is considering battery storage
- Is planning additional electrical loads such as EV charging
- Has a long-term interest in controlling operating costs
When Commercial Solar May Not Be the Right Choice
Solar is not automatically suitable for every business.
Potential challenges include:
- Heavy shading
- Limited roof space
- Poor roof condition
- Structural limitations
- Very low electricity consumption
- Predominantly nighttime operations
- Short-term property leases
- Significant upcoming building changes
- Electrical infrastructure limitations
- High grid-connection costs
A site assessment can identify these issues before a business commits to a system.
Commercial Solar Panels vs Other Energy Options
| Energy option | Best suited for | Main benefit | Key consideration |
|---|---|---|---|
| Commercial solar PV | Businesses with suitable space and daytime demand | On-site electricity generation | Generation depends on solar conditions |
| Solar + battery | Businesses wanting greater solar self-consumption | Stores surplus generation | Higher upfront investment |
| Grid electricity | Businesses with limited solar potential | Existing reliable supply | Ongoing electricity purchases |
| Off-grid solar | Remote locations | Reduced dependence on grid supply | More complex design and storage |
| Microgrid | Sites with multiple generation/storage loads | Integrated energy management | Requires detailed system planning |
For remote and resilience-focused applications, Cybotix’s Off-Grid, Microgrid & Resilience solutions can be considered alongside commercial solar.
Commercial Solar + Battery Storage: When Does It Make Sense?
Battery storage allows electricity generated during one period to be used later.
For example, a business may produce substantial solar electricity around midday but continue operating into the evening. Instead of exporting all surplus generation, a battery may allow some of that energy to be stored and used later.
Battery storage may be worth investigating when a business:
- Has significant solar generation
- Has electricity demand outside solar-generation hours
- Wants to increase solar self-consumption
- Has suitable battery installation space
- Has specific resilience requirements
- Wants to manage certain periods of high electricity demand
The financial case should be assessed using the business’s actual electricity data rather than assuming that adding a battery will always improve the return.
The Electricity Authority identifies batteries as distributed-generation technology and is continuing work on network pricing principles for distributed generation and storage.
What to Look for in a Commercial Solar Installer
Choosing the right solar provider is about more than comparing the number of panels or the headline project price.
Before signing a contract, ask:
- Which solar panel manufacturer is being proposed?
- What inverter will be used?
- Is battery storage available if required?
- What warranties apply?
- Who is responsible for installation?
- Who handles grid-connection requirements?
- What monitoring is included?
- What happens if equipment fails?
- Is future system expansion possible?
- What assumptions were used for the financial forecast?
- What electrical work is included?
- What happens to surplus electricity?
- Who provides ongoing support?
Cybotix states that it supplies LONGi solar panels, Deye inverters and BLUETTI/Deye battery storage as integrated systems and works with licensed electrical contractors for installation.
You can also review the Cybotix FAQ before discussing your requirements.
Commercial Solar in New Zealand: Planning and Compliance
Commercial solar installations need to be properly designed, installed and connected. Electrical work should be carried out by appropriately qualified and licensed professionals.
WorkSafe recommends using a registered electrician for PV installation and highlights different requirements for grid-connected and stand-alone PV systems. It also identifies standards including AS/NZS 5033 for PV arrays, AS 4777.1 for inverter installations and AS/NZS 5139 for battery systems as relevant considerations.
WorkSafe also explains that electrical installations in New Zealand need to be designed and installed to remain electrically safe, with requirements covering design, construction, certification, inspection and connection.
For grid-connected commercial projects, the local electricity distributor’s requirements also need to be considered. The Electricity Authority oversees compliance relating to the connection of distributed generation to distribution networks.
External resource: Electricity Authority — Distributed Generation
External resource: WorkSafe New Zealand — PV Solar Installation Safety
Why Choose Cybotix for Commercial Solar?
Cybotix supplies commercial and government solar systems across New Zealand, with solutions built around LONGi solar panels, Deye inverters and battery storage.
Its commercial solar offering covers applications including:
- Commercial rooftops
- Council and community facilities
- Schools and education
- Agricultural and rural sites
- Off-grid and remote locations
- EV charging infrastructure
- Utility-scale projects
Cybotix states that it is an authorised New Zealand LONGi importer/distributor and provides integrated panel, inverter and storage packages.
This approach can simplify procurement by allowing the solar panels, inverter and storage components to be considered as one system rather than selecting unrelated components separately.
Learn more about Cybotix Commercial & Government Solar.
What Does a Commercial Solar Installation Process Look Like?
A commercial solar project normally begins with understanding the site and its energy requirements before equipment is selected.
1. Review Your Electricity Usage
Collect electricity bills and, where available, detailed consumption data. This helps identify when and how much electricity your business uses.
2. Assess the Site
The roof, ground area, shading, orientation, access and existing electrical infrastructure should be assessed.
3. Design the System
The solar capacity, inverter configuration, battery requirements and electrical equipment can then be matched to the site.
4. Confirm Grid Requirements
For grid-connected systems, connection requirements should be discussed with the relevant electricity distributor and other parties where required.
5. Installation and Commissioning
Qualified electrical professionals install and commission the system according to the applicable requirements.
6. Monitor Performance
Monitoring allows the business to track solar generation and identify potential performance issues.
For commercial solar enquiries, contact Cybotix.
How to Decide If Commercial Solar Is Right for Your Business
Before requesting quotes, collect the following information:
- Your recent electricity bills
- Annual electricity consumption
- Typical business operating hours
- Major electrical loads
- Building ownership or lease information
- Roof plans, if available
- Existing electrical information
- Future plans for EV charging or additional equipment
- Your preferred investment timeframe
- Whether battery storage is required
Then ask each solar provider to explain the assumptions behind their proposal.
A good commercial solar proposal should make it clear how the system has been sized, what it is expected to generate, how much electricity may be consumed on-site, what may be exported, and what is included in the installation price.
Frequently Asked Questions
How much do commercial solar panels cost in NZ?
There is no single commercial solar price because project costs depend on system size, panels, inverters, batteries, roof conditions, electrical work, installation requirements and grid connection. A site-specific assessment is the best way to establish the likely project cost.
How many solar panels does a business need?
The number of panels depends on the business’s electricity consumption, available space, panel capacity, solar conditions and desired system size. A commercial solar system should be designed around the site’s energy profile rather than simply choosing a fixed number of panels.
Is commercial solar worth it in New Zealand?
It can be, particularly for businesses with suitable solar exposure and substantial daytime electricity consumption. The potential return depends on the system cost, electricity usage, solar generation, export arrangements and other project-specific factors.
How long does commercial solar take to pay for itself?
The payback period varies between projects. It depends on the upfront investment and the financial benefit produced by the system, including electricity purchases avoided through solar generation and any value received for exported electricity.
Can commercial solar panels power a business during a blackout?
A standard grid-connected solar system should not be assumed to provide electricity during a grid outage. Backup operation requires suitable system design, equipment and controls, often involving battery storage.
Should a business get solar panels or solar batteries?
It depends on the business’s electricity usage. Solar may be sufficient where there is strong daytime demand, while batteries can be useful when a business wants to store surplus solar for later use or has specific resilience requirements.
How long do commercial solar panels last?
Solar panels are designed for long-term operation, but actual performance and useful life depend on the equipment, installation conditions and maintenance. Businesses should review the manufacturer’s product and performance warranties when comparing systems.
Ready to Explore Commercial Solar for Your Business?
The right commercial solar system starts with understanding your site, electricity consumption and future energy requirements.
Cybotix can help businesses assess their requirements and develop a complete solar solution using commercial solar panels, inverters and optional battery storage.
Planning a commercial solar project?
Request a Commercial Solar Quote from Cybotix
Author: Cybotix Energy & Technology Team
The Cybotix team provides energy and technology solutions for New Zealand businesses, including commercial solar, battery storage, off-grid and resilience applications.