Photo Voltaic (PV) Solar Electricity
Why invest in power company shares with taxed dividends, when you could invest in generating clean, green electricity - tax free!
How does Photovoltaic Solar work?
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Photovoltaic solar harnesses light, converting it to electricity through silicon crystals. The silicon crystals are man-made as single faceted crystals (mono-crystalline) or multi-faceted crystals (poly-crystalline). Polycrystalline crystals are more expensive to make used to have slightly better efficiency, but new production Methods have closed the gap, you will generally pay around the same price per watt produced from either type.
Electricity is produced as direct current (DC) and must be inverted to alternating current (AC) for use in your home. We use the high quality NZ made Enasolar power inverters, from Enatel (Christchurch).
Patented cooling design, mechanical safety interlocks, IP55 outdoor rating and WiFi capable for website and iPhone monitoring of your solar production.
Warm and Cool use Clean Energy Council certified Vikram Polycrystalline Neo 60 panel which uses Passivated Emitter Rear Cell (PERC) technology technology, next generation module designed for very high efficiency and guaranteed peak output (+Wp) positive power output tolerance. The Vikram panels have a 12 year product warranty and 27 year linear power warranty and certified for salt and mist corrosion resistance. You need to exercise caution when buying solar panels - a cheap price may seem attractive, but long term quality and performance may be compromised, which equates to a poor investment. Vikram PV Panels are manufactured to meet international standards and have received global brand recognition and certification as a Tier 1 company. Vikram Neo 60 PV Panels use anodized aluminium frames and every cell is stamped to verify authenticity and performance before it leaves the factory. For more information download Vikram Solar Brochure.
Mitsubishi and LG panels are also available upon request for setting up a photo voltaic system of your choice.
Talk to us about what is the best option for your project.
Solar panels may be on top, but it's the inverter that does all the real work. Choosing an inverter technology is the most critical decision you'll make when going solar. Enphase Microinverters offer the most advanced inverter technology on the market, which means higher production, greater reliability, and unmatched intelligence.
The Enphase system differs from conventional photo voltaic setups by replacing the shared central "string" DC to AC power inverter with small dedicated inverters for each solar panel. The key benefit being that the performance of the system as a whole is not governed by the lowest performing panel in the string thus minimising the impact of dirty, shaded or faulty panels. The Enphase inverters are paired with sophisticated monitoring software which allows you to easily gauge performance and detect faults with the aid of automated alerts.
Electricity storage can be facilitated with a Residential AC battery system designed to be paired with photovoltaic panels.
Panel Dimensions / Configuration
Solar arrays can be mounted on the roof of your home or on ground-mounted frames. If you have a roof area with a northerly aspect, you will also need to check to see if your roof has suitable space available, as arrays are quite large.
- Vikram NEO 60 Polycrystaline panels measure 1640mm high x 992mm wide (1.627 m2 each). A typical 2.0 kilowatt array includes 8 panels, needing a 13 m2 area.
- LG panels measure 1632mm high x 986mm wide (1.609 m2 each). A typical 2.0 kilowatt array includes 8 panels, needing a 13 m2 area.
- Arrays can be installed as a single line of panels or as strings of equal number e.g. 4 + 4.
Most urban houses will find a 2.0 or 3.0 kilowatt per hour system is suitable. We can install as small as 1.5 kilowatts or as big as your situation allows.
|Capacity||2.0 kw||3.0 kw||4.0 kw||5.0 kw|
|Area Required||13 m2||20 m2||26 m2||33 m2|
Grid-tied or Off-grid systems?
Grid-tied systems supply electricity directly to your household system. The aim is to use as much of the electricity produced at the time of production which means that you are not drawing electricity from the main-grid and not paying for any either! A two way meter can be fitted to your home to allow any excess electricity to be fed back out to the main-grid. You need to check with your energy provider to see if you can be paid for excess electricity you produce.
Off-grid systems can supply electricity into your household system, but also utilize storage batteries to provide some electrical energy at night. These systems tend to have more panels and bigger capacities. This, combined with the high cost of storage batteries, makes these systems fairly expensive and they are really only justifiable where standard electricity cannot be installed cost-effectively.
Return on Investment
This is a simulated scenario and may not reflect actual individual situations. Based on an electricity price of 21 cents per kilowatt and a bank investment return of 4.5% per annum.
An investment of $8,100 in a 2.0 kilowatt solar system will yield around $615 a year (tax free) a year, in savings (far left). A good bank investment will return $365 (4.5%) but you will have to pay tax on the earnings at the applicable rate (the green portions), so the real return on a bank investment (blue portion) is much less than a quality solar system can achieve.
Mitsubishi Electric Case Study: Complete Family Home System
Energy efficiency is a key consideration for any home owner. This was no different for a Christchurch family setting out to build a 345m2 home featuring the latest in Mitsubishi Electric heating and air conditioning. As a stay-at-home family they needed a solution which would ensure their energy usage was kept to a minimum across the entire day. Full Article
Make your new home Solar Ready today for only $495 (incl GST)*
Install an Inverter Ready Cabinet, including Wi-Fi capability and fit the conduit for future wiring.
Future Proof and increase the resale value of your home.
Low Cost feature that allows easier installation at a later date.
Fully Compliant with NZ electrical safety standards.
Flexibility that enables you to install when you are ready.
IP55 Rated for indoor or outdoor installation - you can even hose it down!
* Some conditions apply
Power your car with Solar Electricity
Warm and Cool believes that the age of the electric car is now upon us. Given New Zealand's substantially green electricity, when combined with free electricity sourced from the Sun, we believe that we are on the point of a revolution in the way we commute to work, school and generally get about town. Technological advances made over the past decade are now affordable to the average household resulting in real and significant savings in the cost of powering our lives - both at home and now on the road.
Learn more about Electric Vehicles