Check Out Our New Solar Show Home In Nelson

Are you thinking about getting a solar system installed at your home but are still unsure about how it would work? Maybe you would feel more comfortable if you got to see one in action. Luckily for you, we can do just that!

We are preparing a show home in Nelson where we can show people interested in solar just how our systems work. We have set up the system using the latest Mono Perc all black solar modules on the roof and Austrian made Fronius string inverter, with Italian made hot water solar diversion system. This system is one we would recommend and is the latest in solar technology.

If you would like to come and have a look, please get in touch with us. We will organise an appointment to be able to take you through the home and show you everything you’d like to know. Contact Lance on 027 544 3025

Renewable Energy

In your search for a solar energy solution you will have read about “renewable energy”. Is it a term that you are familiar with? Do you know what it really means? Often, when searching for a new product you will read terms that those in the know will happily bandy about – you can either skip over them and hope that you will understand eventually what they’re talking about or you can dig a little deeper and develop your own understanding.

So what is Renewable Energy?

What is the definition of Renewable?  Renewable means that something is capable of being replaced by natural ecological cycles. What about Energy? Energy can have many definitions, but today we will take the definition of “usable power” So, when you come across the term “Renewable Energy” you can understand this to be “usable power that can be replaced naturally”.

What sort of power is this? Wind, Solar, Geothermal, Hydro Electric and Biomass all fall under the renewable energy category. Each source of renewable energy has unique benefits and costs involved but all create much less environmental impact than traditional forms of energy. Wind, solar, and hydroelectric systems generate electricity with no associated air pollution emissions, however geothermal and biomass energy systems do emit some air pollutants – although the total air emissions from geothermal and biomass energy systems are generally much lower than those of coal- and natural gas-fired power plants.

Why is it so important to choose to use renewable energy? Well, for centuries humans have been slowly, but surely, depleting the earth’s natural resources. Coal and Natural Gas have long been the world’s major source of energy for use in industry and home. Scientists have discovered though, that the world’s coal veins and gas fields are fast dwindling and on top of having a finite number of years left before there is no more, they both contribute carbon dioxide and other global warming emissions into the atmosphere. These bad emissions trap heat and steadily drive up Earth’s temperature and this in turn creates significant impacts on our health, environment and climate.

What kind of benefits are found with renewable energy? Generating electricity from renewable energy rather than fossil fuels can offer significant public health benefits. The air and water pollution emitted by coal and natural gas plants is linked to breathing problems, neurological damage, heart attacks, and cancer.

Wind and solar energy require essentially no water to operate and thus do not pollute water resources or strain supply by competing with agriculture, drinking water systems, or other important water needs.

Renewable energy can provide economic benefits too. Throughout the world, strong winds, sunny skies, plant residues, heat from the earth, and fast-moving water can each provide a vast and constantly replenished energy resource supply. These diverse sources of renewable energy have the technical potential to provide all the electricity the nation needs many times over with minimal cost.

While renewable facilities require upfront investments to build, once built they operate at very low cost and, for most technologies, the fuel is free. As a result, renewable energy prices are relatively stable over time.

The costs of renewable energy technologies have declined steadily, and are projected to drop even more. The cost of renewable energy will decline even further as markets mature and companies increasingly take advantage of economies of scale.

Using more renewable energy can lower the prices of and demand for natural gas and coal by increasing competition and diversifying our energy supplies. An increased reliance on renewable energy can help protect consumers when fossil fuel prices spike. 

What are the risks in relying on Renewable Energy? The risk of disruptive events will also increase in the future as droughts, heat waves, more intense storms, and increasingly severe wildfires become more frequent due to global warming. Renewable energy sources are more resilient than coal, natural gas, and nuclear power plants in the face of these sorts of extreme weather events.

For example, coal, natural gas, and nuclear power depend on large amounts of water for cooling, and limited water availability during a severe drought or heat wave puts electricity generation at risk. Wind turbines and solar photovoltaic systems do not require water to generate electricity, and they can help mitigate risks associated with water scarcity.

Wind and solar are less prone to large-scale failure because they are distributed and modular. Distributed systems are spread out over a large geographical area, so a severe weather event in one location will not cut off power to an entire region. Modular systems are composed of numerous individual wind turbines or solar arrays. Even if some of the equipment in the system is damaged, the rest can typically continue to operate.

 

 

 

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

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.

 

PV cells are laminated to a thin sheet of glass. Sunlight in the form of photons strike the PV cells, exciting electrons in the silicon. An electric current is generated when the electrons are collected by wiring that is incorporated into the PV cells.

 

photo_voltaic_panelsA solar panel consists of multiple PV cells, the amount will depend on the output voltage and current required of the solar panel. Solar panels range in size from around 5 to over 400watts peak output and produce DC (direct current).

 

Multiple solar panels are connected in strings, to build a solar array. The size of the array will depend on how much energy is required to be generated, generally up to 10kWp for a standard domestic installation in New Zealand.

 

The DC energy from the solar array can be stored in batteries and then converted to AC by an inverter as when required or you can convert the solar energy directly to AC with a grid connected inverter and feed any excess energy into the national grid for credits.

 

 

 

Do You Go With Grid Tied Or Off Grid Solar?

When designing a solar system for your home, the biggest decision you need to face is whether you go with an off grid or a grid connected system. There are various factors that will determine your decision in this instance.

 

grid_connected_or_off_grid_solarWhat dictates which system you go with? A major factor will be firstly whether there is a mains power connection. In a rural area without mains power, the only option will be the use of off grid. However in suburbs and city areas, both systems can be used, though generally a grid connected system is used. Other factors include how much power you require, whether you can store the power generated or you’d rather feed it into the mains power and always have power on hand whether or not your system produces enough.

 

If you can’t decide and would need some advice, give us a call today to discuss which option is best for you!

Why Is Now The Time To Get Solar?

If you have been considering getting a solar system for your home, there is no better time to act than now!

 

get_solar_ready_for_summerSolar systems provide the most in the summer seasons when the sun is shining the most. This is when the system can be used to it’s full potential to provide power or heating for your home. But there is no point beginning your solar installation in summer, of for it to be completed as Autumn arrives.

 

Summer is not too far away and so it is the perfect time to begin your solar installation. It may take some time to design and install your system depending on your requirements so by starting a few months before summer you give yourself time to ensure that it’s all sorted and you can reap the benefits right from the start of the sunny season!

 

Sustainable Energy, Is It Possible?

As technology advances, more and more solutions for energy are looked into to find a solution for fsustainable_energy_is_possibleully renewable and sustainable energy. But is it possible?

Today, sustainable energy is possible, and is becoming more and more financially realistic for home and business owners alike. There are many solar and natural power generation systems available today including PV panels, wind turbines and micro hydro systems, all which produce power by utilising energy that is already there.

If you are looking to save on power or just want a cleaner and greener way to power your home or business, you need to look into a sustainable energy system. Depending on your location and the availability of resources, it may be best suited to use a single type systems, such as just PV solar, or a combination or systems such as solar and wind turbines.

Despite Buy-back Drop Solar PV Still Works

Contact Energy and Meridian’s announcement to significantly lower buy-back rates from solar PV this week has caught the headlines and created a bit of storm. While it’s disappointing that power companies keep shifting the goal posts on buy-back rates, thus complicating peoples’ investment decisions, solar still makes a lot of financial sense.

There’s been a bit of hysteria from people exclaiming the reductions equates to some sort of mortal wound to the solar industry. This couldn’t be further from the truth. While a higher buy-back rate would improve the business case for solar PV, it’s already exceptional without subsidies.

Every week Solar Electric Technology installs systems with returns on investment ranging from 10-20%! Pay back periods are now down to six or seven years, sometimes lower. The most important aspect of making solar PV financially attractive is using the power produced onsite. If this can be achieved the majority of the time, it will work, if it can’t it probably won’t – it’s not rocket science.

There are new technologies such as the NZ made ImmerSUN from Enasolar which work with appliances such as hot water cylinders to make sure they are charging on solar power during the day to minimise the amount of power exported to the grid. Clothes washing, dish washing, and electronic charging can all be done during the day. Solar can be made to work for most households.

Businesses primarily use power during the day and their returns from solar are generally better than for households. Businesses hit the sweet spot of being able to install larger systems, meaning less expensive per unit costs and economies of scale combined with power being consumed onsite during the day.

It would be great if power companies stopped changing their minds every five minutes so better informed market decisions could be made. In the meantime – just cut the power companies out during the day by going solar. Make a sound financial investment and lower your carbon foot print. It’s a win-win.

Interested in how solar cold work for you? Check out our solar PV packages.

RenaSola Named “Top Brand PV” by EuPD Research

ReneSola Named "TOP BRAND PV" in Benelux by EuPD Research

RenaSola recently announced it has been awarded a "TOP BRAND PV" seal in the union of states of Belgium, the Netherlands, and Luxembourg ("Benelux") by EuPD Research, the leading market intelligence company in the sustainable business sector and an independent brand management appraiser of module manufcacturers inGermany, Italy, the United Kingdom, Benelux, and France.

 

Surveys  which were conducted between Nov 2013 and Jan 2014, which took into account factors such as, unaided brand awareness,distribution & overall effectiveness of brand management allowed the EuPD Research market analysts to identify the preferences of solar PV installers in Benelux when recommending module brands. The "TOP BRAND PV" seal identifiesReneSola modules as having differentiated themselves from their competition in the perception of customers and industry participants.

 

"This achievement is the result of years of research and development by ReneSola's technical experts, along with the tireless efforts of our European sales and marketing teams," said Mr. Jijun Shi, president of the European region of ReneSola. "Recognition like this inspires us to work even harder to duplicate such success across all our major markets and establish the brand image, competitive differentiation, and credibility among consumers that the 'TOP BRAND PV' seal represents."

 

The company was founded in 2005.ReneSola (NYSE:SOL) is an international leading brand and technology provider of green energy products. The company has a powerful global presence, and an impressive & expansive OEM and sales network

How Does PV Solar Actually Make Power For Your Home?

Photovoltaics, or PV, work by converting light energy to electrical power through the means of a solar cell. It is the process used when utilizing solar panels to create power for your home.

How_pv_makes_powerWhen photos hit a solar cell, electrons migrate causing an electrical direct current between the side facing the sun and the side facing away. An inverter is then used to transform this current into an alternate current which can then be fed into the main electrical grid.

Photovoltaics are the future because it comes from an everlasting power source, the sun. As the sun's light will not run out, the energy coming from it will always be available. Using photovoltaics to power your home is the way to get free power and say goodbye to power bills!

If you would like to know more about how photovoltaics work, read our photovoltaics page on the website. We go into detail about how it works and how it will provide power for your home. For more information call us on 0800 765 270.