A Testimonial From A Customer In Nelson

We recently had the misfortune to have 2 of our 4 solar panels fail (they were pretty old – approximately 30yrs). This was evidenced by the failure of our batteries to be able to hold a decent charge and sought the help of Solar Electric Technology’s technician Lance Double to advice on what to do next.

Lance promptly checked the whole system and while the news wasn’t particularly good it was clear and correct.

We needed to replace our ageing panels, our batteries and as it turned out our regulator too.

Through this process Lance helped by providing prompt information, options and quotes by email and being on the phone when needed.

Once agreed he fitted our installation work into other work, reducing our travel costs and sent an update including pictures of completed work (it was at our bach not our home).

We took the opportunity to get some LED lights installed and this all worked out as above.

I am happy to recommend Lance to anyone fitting or re-fitting solar electric systems.


Richard Wells


Another Testimonial Received From Mike

Mr Lance Double has been known to us for some years. He was initially with another solar technology company, Ecogise, when we first consulted him re planning our off-grid house. That company merged with another provider and we carried on our relationship with Mr Double and utilised his technical advice in planning our  installation.

In 2011 Mr Double personally installed our system (a 10 panel/battery/inverter/back up generator, assembly). On his advice we added extra 180-watt panels that has proven to be a wise move. There were some initial issues with back up generator sequencing but Mr Double spent considerable time and effort rectifying the program that has worked without fault since. We have found Mr Double to be open to discussion and willing to address our concerns in a timely manner.

In an industry that has more than its share of untrained opportunists we believe Mr Double and his company have proven to be a technically competent and reliable service. The fact that he remained in the market and has grown his business confirms our original confidence in his expertise.

With the caveat that one must always check the options, we have no hesitation in recommending Mr Double to anyone considering going solar. We continue to utilise his services to maintain our installation. We may be contacted by phone if required.

G.M Waring.

A Happy Customer In Motueka

We received this lovely review from a customer we did a residential solar installation for. It reads:

“In December 2016 we finally took the plunge and made a significant investment decision to install a substantial residential PV system on our property.

This decision was not taken lightly as there were a number of difficulties in achieving our goal.

Lance and the team at Solar Electric were extremely helpful,patient and professional in the design of our system and we are so far delighted with the installation and it’s performance.

Our Micro Inverter system is ‘Enphase’ based with power supplied from Jinko Solar Poly Crystalline Panel Modules and although I am no expert in the field both appear to be of superior construction with a good warranty profile.

I have no hesitation in recommending Solar Electric Technology and would be only too pleased to talk to / communicate with any serious prospective client of theirs about our system and albeit early days yet their support

So far has been outstanding.

Dan Oakeley
Brooklyn, Motueka 7198”

Summer is here, make the most of free energy.

Summer is here! The days have suddenly turned from grey, overcast and wet, wet, wet to blazing days of glorious sunshine. Long may it last! Wouldn’t it be great to do more than just enjoy the sunshine though? Now that Summer is here, it is time to make the most of the free energy the sun provides us.

Have you ever imagined the possibility of using the sun as a source of energy to power your home? Yes? No? If you’re reading this blog, then you more than likely have more than a passing interest in doing this.  Solar cells have been commercially available since the 1950`s but the basic working principles were first discovered more than 160 years ago.

Harnessing solar energy is becoming more popular as costs decrease and the potential for homeowners to save money on bills and earn income from exported energy increases. On top of this, with the introduction of backup battery storage it is possible to use energy from the sun even at night.

What better way to cool, heat and otherwise run your home than by harnessing free energy from the sun. Of course, although this can be done all year round – Summer provides the most hours of sunlight.

First, it is important to understand how solar energy is harnessed. Photovoltaic (PV) cells, or solar cells, come in many different shapes and sizes and are made of electricity-producing materials. When sunlight shines on a PV cell, the absorbed light generates electricity. Because PV technologies use both direct and scattered sunlight to create electricity, the solar resource across the United States is ample for home solar electric systems. A PV system generates clean, cost-effective power anywhere the sun shines and in New Zealand, unless you’re under a rock during summer, the sun will shine where you are.

Another way to tap solar energy is by collecting the sun’s heat. Solar thermal power plants use heat from the sun to create steam, which can then be used to make electricity. On a smaller scale, solar panels that harness thermal energy can be used for heating water in homes, other buildings, and swimming pools.

Have you ever noticed how sunlight streaming through a window can make your home feel warmer, even on a cold day? If so, you’ve seen passive solar heating in action! People can design or remodel buildings to take advantage of heat from the sun during the winter. It helps to have large windows that face south (the side that gets the most sunlight everywhere north of the Equator) and are not shaded by other buildings or trees. A good design often includes overhangs, movable awnings, or blinds that block the sun during the summer when people need to cool their homes instead of heating them.

The electricity generated by solar panels is 100 percent renewable, predictable, and reliable. Solar energy production can be very accurately predicted—meaning you know how much you can expect your system to produce before you even install it.

Every home owner should consider installing a Solar powered electrical systems as a feature. The benefits are fantastic, particularly the cost savings and impact on the environment. However, there are certain factors that can make homes ideal (or not) for installing a solar power system. Consider these factors when deciding whether or not you should have a solar power system installed in your home:

  • You own your home
  • Your roof has a face without too much shade
  • Your roof is in good condition
  • You have significant energy bills

In addition to major environmental and energy cost benefits, solar energy offers several unique features that make it an extremely attractive option for many home owners, especially those concerned with energy security and independence. Unique benefits of solar power include:

  • Low maintenance: Once your solar panels are installed, there is only basic yearly maintenance and cleaning to keep them in good working order.
  • Consistent and constant power source: We know that every day the sun will rise and set — and we even know when it will happen.
  • Energy security: The sun answers to no one and it’s available with no limits, offering superior energy security to those who harness its power.
  • Silent operation: Unlike noisy generators and power plants, solar panels make no noise as they create energy from the sun.
  • Low space requirements: Solar panels do not require much space, and they can be mounted almost anywhere.
  • Roof protection: It’s important that your roof is in good condition when your solar panels are installed, but keep in mind that your solar panels may offer a level of protection.
  • Off grid living options: In some remote areas, it is extremely expensive (and potentially cost prohibitive) to tap into the electrical power grid.
  • Solar panels are built to last: Most solar panels should last for about 25 years.
  • Solar energy system inverters often last 10 years or more: While solar inverters don’t last as long as the panels themselves, they typically have a usable life span of about 10 years or more.

Really, there are more benefits to going solar in the Summer than in any other time of the year. Not only will installing solar save you your money but it will also increase the value of your home.

Contact esolar.co.nz on 0508 449 274 to get help in harnessing the natural energy from the kiwi summer sun and switch on to a new solar energy system for your home!

Micro Hydro Green Engergy

Green energy, is fast becoming the must have, especially in New Zealand where we love our clean green image.  Micro Hydro, renewable energy is one way New Zealanders are using to get that effect.  Micro Hydro as the name suggests uses water to produce power.  This is ideal for people who live near a water source. 


It is also used in third world countries as a way to get energy.  It is used normally in conjunction with a normal energy company but the company generally “subsidises” the output from the micro hydro.  Maintenance is minimal and easily done.  There are many options to go along with micro hydro, you can store the excess energy, you can invert the energy or even in some cases sell the energy back to the company grid.

How does a micro hydro generally work? First water is diverted from the source along a channel and dropped into a cross flow turbine, the rotating mechanical power is converted into electricity.  Power is then fed into the electrical grid and the water directed back to the source.  Micro hydro is an electricity generator which uses a turbine and generator to convert waters kinetic energy to electricity.  Water needs to flow from a specific height with enough quantity to drive a turbine.  This turbine produces kinetic energy. Which produces power.

Many people are starting to want to live “off the grid” or have their power bills reduced and Micro-Hydro is a very popular choice since New Zealand is an island and water sources common.  There are generally three sizes of micro-hydro, up to 5kW, between 5kW and 20kW and 20kW and 10MW.  For a domestic one expect to pay between $10,000 to $15,000.  There is some maintenance involved in keeping the system running, the water way needs to be free of leaf litter and other debris and the equipment also needs maintenance.  You need to check if you will need a consent to build one, this is especially if you need to build a dam or the like.

So as we have seen New Zealand is an ideal country for the option of a micro-hydro system so why not check out if it is possible for you.

Is Solar Heating Sustainable Energy?

What does it matter? Of course solar heating is sustainable… isn’t it? First of all, we need to understand what Sustainable Energy means. What sets sustainable energy apart from other energy sources is that it can only be naturally replenished, and it causes no harm to the environment. The endeavour is to use energy sources that allow Earth to sustain balanced, healthy ecosystems and human life. 

Sustainable energy can also be achieved through energy conservation and efficiency. The worry is that if we do not start investing in sustainable energy sources, the sources of energy most commonly used will run out. If this happens, our future generations will then be forced to do what we are already doing—finding new ways to generate energy.


The sun is one of the most important sources of renewable energy available.
Scientists and engineers have studied in depth the process of photosynthesis and have observed how plants absorb sunlight and convert it into stored energy for development and growth. Viewing this incredible process, and recognising the benefits that could be found if humans copied this, scientists and engineers have created a sustainable energy formula and can now convert sunlight into useful heat or electricity. This is otherwise known as Solar Energy.

So when it comes to using solar energy for heating, what sustainable options are available? There are two main types of solar energy heating systems: photovoltaics, and thermal systems.


What a name. As previously mentioned in our blog “WHAT DOES PV OR PHOTOVOLTAIC MEAN?”

Photovoltaic (PV) essentially means electricity from the energy of the sun and is derived from the words “photo” with the Greek meaning light and “voltaic” meaning voltage. The term “photovoltaic” is used to describe a process known as the “photovoltaic effect” the process by which a material such as silicon converts sunlight into electricity.

These systems can be built as small as to fit on a hand held device, you can have a building-integrated system with capacities from a few to several tens of kilowatts, or they can run large utility-scale power stations creating and using hundreds of megawatts. Most PV systems are grid-connected, while off-grid or stand-alone (hybrid) systems only account for a small portion of the market. PV systems are one of the most flexible systems available.

A photovoltaic (PV) solar system requires solar panels, racks for putting the panels on your roof, electrical wiring, and an inverter. These systems are silent and have no moving parts. Best of all there are no environmental emissions.

A photovoltaic system is especially valuable for remote rural applications where it would be incredibly expensive to connect electricity from the main grid.

With these systems, you can choose to be “On-Grid” or “Off-Grid”

On-grid means that you tie your solar to your local power provider’s system. Most homes will use an On-grid connection because you are then covered if your system under or over-produces energy. Being on-grid means that you don’t have the added outlay in purchasing a battery back-up system to store any excess energy which can be very expensive. An On-Grid Photovoltaic system are the simplest systems and the most cost effective to install.  These systems will pay for themselves by offsetting power bills in 3-8 yrs. These systems however do not provide power during a grid outage.

Off-grid means you are not connected in any way to an external power system or utility company. This can be appealing because you are 100% self-sustaining your energy use. If the power network goes down or, if you have chosen not to be on the grid – these systems allow you to store your solar power in batteries for use.   Off-Grid systems however require a lot more specialized equipment to function and with that comes high costs and more complexities when it comes to installation.

Thermal systems

Solar Thermal Systems seek to store heat from the sun. They differ from Photovoltaic systems. Photovoltaic systems create electricity – Thermal systems heat water. You still have solar panels installed say on a roof, or other location to absorb sunlight. There are active systems like a solar water heater and passive systems like greenhouses. They both collect solar energy on sunny days and utilize it later for warmth.

Solar heating is appropriate for nearly every household. Access to good sunlight is mandatory but in New Zealand most people have enough of it. Solar heating is clean, it can operate independently or in conjunction with traditional power sources, and it is remarkably renewable.  Besides having to manufacture the equipment needed to capture the sun’s heat, there is no environmental impact from making solar energy at your home. Heating your water with solar energy can be a rewarding venture. Solar heating is indeed sustainable energy and a great option for you to consider.

Emphase Solar Storage System

In August this year a new solar storage system will be hitting the market, there will only be limited quantities available so if you want one contact us today.  This Enphase AC battery is one of the lowest upfront cost and highest lifetime value storage systems on the market.  It delivers high performance and superior reliability with the safest battery technology.  This system can be retrofitted into most existing solar PV systems and the only required component is the Enphase Envoy-S metered communications gateway.

 The AC batteryEmphase_solar_Storage_System

  • 2kwh
  • 25kg weight
  • 1% round-trip efficiency for the battery
  • 95% depth of discharge
  • 10 year warranty
  • LFP chemistry
  • Cells safety tested and certified by TUV Rheinland

The Enphase Storage System is a smart, connected, integrated solution that delivers high performance and superior reliability, with the safest battery technology.  Its modular architecture can be cost-effectively tailored to fulfil your individual energy needs now and in the future if your needs change.  This system is easily affordable and easy and quick to install.  The battery interconnects with standard household AC wiring.  Because of the modular configuration you can install one now and then one later.  It can be installed in single or three-phase households and you won’t need separate SKUs.

Enphase Energy is a global energy technology company, that delivers simple innovative and reliable energy management solutions that advance the worldwide potential for renewable energy.  They are leading the charge to bring smart, connected solar energy to every home, business and community.  We at Esolar work along with this company to bring to New Zealand its advantages.  We have become the trusted name in NZ solar. Esolar.co.nz can design and install an off the grid or grid connected solar panel system to meet your energy requirements and budget then­ you will no longer be susceptible to the ever increasing power prices, while at the same time reducing your environmental impact. By installing one of our systems you and the environment benefit so call us today and ask about the new Emphase Solar storage system.

Sustainable and Renewable Energy with Solar

Now is the future where you can eliminate your power bill and reduce your carbon footprint with a sustainable renewable energy system.  Esolar.co.nz can design and install an off the grid or grid connected solar panel system to meet your energy requirements and budget. By utilizing photovoltaic solar panels, you will no longer be susceptible to ever increasing power prices, while at the same time reducing your environmental impact. It’s a win-win situation so why wait? Call now for a free quote.

How they work

Photovoltaic solar panels use the energy from the sun, to generate sustainable electrical energy to power your home or business. The energy generated can be fed back into the national grid (Grid Connected system) to offset your energy costs or you can be totally independent of the grid (Off the Grid system) and store the energy in batteries.

How do Solar Water Heating systems work?

  • ­Water from the bottom of the hot water cylinder is circulated by pump through the Heat Exchange Manifold at the top of the collector and back to the cylinder.
  • The pump is controlled by a difference thermostat controller which has temperature sensors in the heat exchange manifold and in the top and bottom of the cylinder.
  • The pump is activated when the temperature of the collector is greater than the water temperature at the bottom of the cylinder.
  • The controller can be set to suit your individual needs.

Evacuated Tube Technology

The Solar Technology Sunsaver uses Evacuated Tube Heat Pipe technology which in conjunction with a Heat Exchange Manifold offers exceptional performance superior to any other type of solar collector.  Higher heat efficiency is due to a combination of the advanced heat transferring style of the Heat Pipe, Selective Absorbent coating and high vacuum heat preservation state.  As sunlight enters the Evacuated Tube it strikes the selective absorbent coating and turns to heat.  Heat is transferred to the heat conduction fluid contained within the copper Heat Pipe. This fluid has a low boiling point and quickly shoots up to the Heat Pipe Condenser Element contained within the Heat Exchange Manifold.  Water passing through the Heat Exchange Manifold absorbs this heat and simultaneously cools the heat conduction fluid causing it to fall again, ready to restart the process.sustainable_and_renewable_energy

How Do Grid Connected Or Grid Tied Power Systems Work?

A PV Solar Grid Connected System

  • Photovoltaic solar panels mounted on your roof, or on a ground mounted frame, use the sun’s solar radiation to generate DC (Direct Current) electricity.
  • The electricity travels to a grid tie inverter, usually located near to the switchboard which converts the DC electricity into 230 volts AC (Alternating Current) as used in your home.
  • The energy generated can be used within the home or business first and any excess electricity is fed into the national grid. If there is little or no solar energy available because of bad weather or at night, energy is sourced from the national grid.
  • A two way (Import/Export) meter is installed in place of your existing meter, to measure the energy you feed in and take from the national grid.

How Do Off Grid Power Systems Work?

A PV Solar Off Grid System

  • Solar generation solar PV panels mounted on your roof, or on a ground mounted frame, use the sun’s solar radiation to generate DC (Direct Current) electricity. (Wind and water turbines are sometimes used as alternative to, or in conjunction with, solar generation.)
  • The solar controller – The voltage and current generated from the solar panels is controlled by a solar controller. This ensures the batteries are charged at the correct voltage, and prevents damage to the battery bank.
  • Battery bank – The DC electricity being generated is stored in a battery bank for use as and when required. The battery bank is sized so there is enough storage for at least 3 days without any solar generation.
  • Inverter / charger – An inverter/charger converts the DC energy stored within the battery bank into 230volts AC (Alternating Current) as used in your home.
  • Back-up generator – If there is little or no solar energy available for a number of days, the inverter/charger will automatically start a backup generator and re-charge the battery bank so that you are assured plenty of power.
  • Optional monitoring. It is possible to set up remote monitoring of the system, if required.

For a residential ON GRID power system

System Produces
2kwp 2,600 – 3,000 kwh per year
3kwp 3,900 – 4,500 kwh per year
4kwp 5,200 – 6,000 kwh per year
5kwp 6,500 – 7,540 kwh per year

For a residential OFF GRID power system, we recommend

For a We recommend
Bach/small daily power load 2kwh system
Small home/low power load 3.5kwh system
Standard home/average power load 5.5kwh system
Above average power load 8kwh system

Solar installers throughout New Zealand

Solar Electric Technology Ltd is one of New Zealand’s leading solar companies.

We offer complete energy solutions for homes and businesses. We cover all of New Zealand and provide an all in one design installation and customer care service. Our website can streamline a quote for you, we offer the required information and system specifications and downloads for obtaining a building consent and drawing the system information into the plans.

Solar panels can be easily installed on your roof and is fast becoming popular as a way to offset energy costs. Whether you want to go off the grid or remain connected we can sort out your individual wants and needs.

The price of photovoltaic solar panels has dropped considerably so now is the best time to invest in sustainable energy.
New Zealand is a fantastic country to utilise solar energy, let’s look at the statistics.

In Northland well over 1900 sunshine hours are recorded annually. Auckland records well over 2000 sunshine hours annually. The Waikato records well over 1800 sunshine hours annually. The Bay of Plenty and Gisborne record the sunniest at over 2300 hours annually. The Hawkes Bay over 2200, Manawatu and Wanganui over 1900, Taranaki over 2000 and Wellington over 1800 hours annually. Then in the South Island Malborough records over 2200 sunshine hours annually, the Tasman is sunniest at over 2500 sunshine hours annually. The West Coast 1800, Canterbury 1900, Otago 2200 and Southland 1600 sunshine hours annually. That’s a lot of sunshine.

Let’s look now at the benefits of PV and thermal systems. Price is a big benefit; module prices have fallen dramatically while energy prices continue to grow at a rate of 7.5% per annum on average. After installation commissioning maintenance is hardly needed. The solar modules are stable and extremely durable and have a long performance guarantee of 25 years. Solar energy has the highest long term potential of all renewable energy sources. Environmental benefits are of course huge. New Zealand is a front runner in being environmentally friendly.

New Zealand is a sunny country as has been shown so utilising the sun is easy. It is regenerative and economical. It is possible to provide very exact forecasts of the yields to be expected. So it’s a win win, save money and the environment, what’s not to love. Call us now or use our online quote system, you won’t be disappointed.

To find one of our New Zealand Installers in our area, please visit our contact page and click on the map for your relevant area.