EMERGENCY, TEMPORARY, BACKUP AND SITE POWER

Generator and Battery Storage Solutions for your Specific Requirements

GRNZ is a New Zealand owned and operated company providing generator rental, generator hire, site battery energy storage solutions and electrical load testing across multiple industry sectors. Our experienced team provides engineered emergency and temporary electrical solutions to ensure our customers' needs are met in the most cost-effective and timely manner. Feel free to call or email to discuss your specific requirements with us.

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Our Valued Clients

Why use Generator Rental NZ (GRNZ)?

Our experienced hands on team ensure you get the best generator rental services for your specific application. As a New Zealand owned and operated company, we are committed to ensuring you get the very best solution, customer service and support at an affordable price.

About us

Comprehensive Range

Whether you call it a rental generator, hire generator, diesel generator, emergency generator or backup generator, Generator Rental NZ Ltd (GRNZ) offers a comprehensive range of well maintained, dependable diesel generators, lighting towers and load banks for short or long term rental or hire.

Supply Throughout NZ and the Pacific

GRNZ have the capability to supply a full range of generator rental services throughout New Zealand and the Pacific. Typical applications include: construction sites, planned and unplanned power outages, shows and events, temporary accommodation, data centres, health care and disaster relief.

Highly Competitive

Our generator rental services and solutions have proven to be highly competitive within the rental power generation market regardless of whether it is a domestic, infrastructure, industrial, healthcare, retail, oil, gas or mining type application.

10kVA to 2.2MVA

We can supply rental generators and hire generators ranging from 10kVA to 2.2MVA. Our rental generators and hire generators are available with all accessories. With delivery, commissioning, decommissioning and ongoing technical support during operations, you can trust GRNZ to provide a fully functioning generator rental or generator hire solution.

Delivery

For all rental and hire requirements, GRNZ provides a delivery service via our fleet of towable trailer-mounted generators, or skid-mounted units delivered by HIAB trucks.

High Performance Levels

We achieve high performance and reliability levels through a combination of advanced proactive preventive maintenance processes and comprehensive pre-dispatch testing of all our equipment. All technical aspects of our rental of equipment to you is overseen by our senior engineering team to ensure your expectations are exceeded throughout the project.

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Call us or email us to discuss your specific requirements with our engineering team.

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Latest Projects

Explore some of our recent projects at Generator Rental NZ Ltd, where we provide innovative and reliable power solutions across New Zealand. From large-scale events and critical infrastructure to specialised industries and emergency support, our expertise ensures your power needs are met, no matter the challenge.

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Battery Energy Storage System

GRNZ works closely with construction site estimators and managers to substantially reduce their diesel power generation costs on site and simultaneously reduce their carbon footprint. In some cases, diesel power generation can be eliminated completely. We use battery energy storage systems (BESS) to optimize efficiency and consumption while reducing noise, emissions and excess fuel consumption. The automated system minimizes generator engine run-time and maximizes use of stored battery energy. GRNZ’s extensive expertise is the perfect partner for any client wanting to investigate the battery energy concept. From commercial feasibility and design, right through to installation, commissioning and ongoing support.

Music Festival

Are you looking for a high availability power solution for your event? GRNZ recently supplied two 750kVA, very low noise generators for an event in Wellington. These 20 ton generators were configured to run in parallel and to load share. Should one fail or its electrical output be compromised, the other would pick up the entire gig's load without interruption.

Geothermal

Generator Rental NZ Ltd is widely recognised throughout New Zealand and the South Pacific region as a company with the fleet and technical competence to supply generators and associated equipment to the highly technical drilling industry. Our success is due to top quality equipment and backup services, innovative ideas and a highly skilled and motivated staff.

Film & Broadcasting

GRNZ are a supplier of generators for broadcasting and filming companies. Mobile broadcasting vehicles require a reliable source of power for the various sensitive and important equipment components when broadcasting on location. GRNZ provide a fully bespoke design and sizing service, to ensure you get the solution that’s fit for your requirements. With large fuel tanks, power distribution and remote monitoring systems fitted, you can be ensured our operators will keep your operation rolling flawlessly and uninterrupted.

Landfill Gas

For all your multi-Megawatt electrical load testing requirements. This recent Caterpillar/MWM powered landfill gas load testing project involved tons of cabling, large trailer mounted load banks and additional generators and distribution equipment to power the gas plants compressors, blowers, pumps, ventilation and chillers while testing was undertaken. GRNZ undertook delivery to the remote site, connection, testing and demobilization, all within a tight timeframe and to schedule.

Food & Beverage

We have just kick started this 3 year prime power contract for a national aviation provider. The project includes internet based remote monitoring and control, text, email and web based reporting, all fuel, servicing and ongoing 24x7 support.
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From Our Blog

Stay informed with the latest insights, tips, and news from the experts at Generator Rental NZ Ltd. Our blog covers a range of topics, from choosing the right generator size to understanding technical aspects like generator synchronization and motor starting currents. Whether you're looking for practical advice or in-depth knowledge, we've got you covered.

What Size Generator Do I Need?

We get asked this question every day. Many customers start by telling us the size of their building. Sure, your floor size has some relation to the size of the heating and air conditioning, but it doesn't tell us how much power is needed. What is important is what you are trying to power in your building. Some wish to power the whole property. Others will list off a few items that are important to them. So, we ask a few questions to assist us in understand what they need without getting too technical. Do you want to power your whole building to carry on as if nothing happened, or can you make some adjustment and save some money not powering everything all at the same time?

Quarry & Mine Diesel Generators

Quarry & Mine Diesel Generators Diesel generators are essential pieces of equipment to guarantee quarry and mine power. It's important to understand why losing power in a quarry or mine is so bad. If power is lost, not only do the machines and equipment stop working but so do all the sources of light if no independent lighting towers are utilised. If you think about it, quarries and mines are dark places as there is usually not a lot of natural light due to them being in the ground. There isn't going to be natural lighting fixtures in a deep pit, so you need to make sure that you bring a source of light with you and ensure that it doesn't switch off halfway through the work day or night. This could cause a number of issues, but the most important one of them all is that it is very dangerous. Someone could get injured, people could start accidentally colliding with each other, and the situation can become dangerous very quickly.

Prime / Continuous Rating Versus Standby Rating

Prime / Continuous Rating Versus Standby Rating Prime or continuous rated generators (sometimes called base rating) are for situations where the generator will serve as the primary source of power, and will be used for extended periods of time. Some litrature differentiates between prime and continuous load but they are essentially the same. Prime or continuous rating is generally 10% lower than standby rating. Standby generators are intended for shorter runs until the main power source can be reestablished and are generally rated at 10% higher than prime/continuous ratings of the same size and model.

What Is the Life Expectancy of Diesel Fuel?

Diesel fuel can contain two types of water, water in solution or free water. Water in solution is water that is dissolved in the fuel. These very low concentrations of water are reported in parts per million (ppm) and are not necessarily a problem.

How to Calculate the Starting Current of an Induction Motor?

Induction motor starting on full voltage (known as direct on-line starting) has the undesirable effect of drawing five to ten times or more of their full load current. Usually this starting current persists till the motor reaches close to its synchronous speed (rated speed). Induction motors under starting conditions have extremely low power factor of around 10-30%. The combination of large starting current and poor power factor will cause large voltage drop across the system impedance.The starting current, (many times the nominal one) is variable depending on the motor design.Starting-current (also called inrush) is the current drawn by a motor during its runup, or acceleration, to normal operating speed. Its value is in Amperes. Typically it can be from 4 to 8 times the rated current. Ignoring the transients of the first 2 or 3 cycles, then starting-current lasts from the time the motor is first energized (breakaway) until the motor nears full speed, often defined as starting-time.The generally accepted quick field calculation is 225% of the FLA (Full Load Amps) or if not available RLA (Running Load Amps) for a period of 0.5 to 2 seconds duration.

How Do Generators Synchronize with One Another?

A generator cannot deliver power to an operating electric power system unless its voltage, frequency and other parameters are exactly matched. Synchronization is accomplished by controlling the exciter current and the engine speed of the generator/s.Synchronization matches various parameters of one alternator to another alternator or to the bus bar. The process of synchronization is also known as paralleling of alternators or generators.In modern multi-unit applications, physical bus connection and disconnection is achieved via high-speed motorized circuit breakers controlled by the interconnected generator controllers.
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Generators

Comprehensive Range of Generators and Accessories for Rent or Hire

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Battery Energy Storage (BESS/UPS)

Battery Energy Storage Systems (BESS or UPS) for Efficient and Reliable Site Power

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Load Banks

Load Banks for Rent or Hire

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Crane Power & Site Power

Crane Power and Site Power - Battery Energy Storage & Diesel Options

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Leasing

Generator Leasing Provides the Ability to Allocate Generator Costs to Opex Rather Than Capex

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