Sinewave will help you select the right type and size of solar system for your home and slash dollars off your power bill.
Solar offers a simple and very affordable alternative method of powering your home or commercial building. Solar technology continues to advance, whilst the prices of panels and inverters continues to drop and the availability of quality battery storage increases.
SineWave provides on-grid, hybrid and off-grid solar systems. On-grid systems are those where an electricity connection already exists - around 99% of our solar installations.
Hybrid solar systems allow you to store excess energy in batteries which can be used later, e.g. at night or in the case of a power cut.
Off-grid systems are recommended for those who want to be completely independent from the power companies or where no existing electrical grid connection exists and the cost to install one is prohibitive.
How Solar Works
Solar panels are made up of solar cells, which convert the sun’s energy to direct current (DC) electricity, even on cloudy days. This is sent to an inverter, which converts the DC energy to alternating current (AC) electricity. The output is connected to your electrical distribution switchboard, feeding electricity to appliances, lighting, HVAC systems and other components as needed.
If the system is connected to the grid, many energy retailers will purchase any surplus from you.
An import/export meter is installed to keep track of the amount of electricity bought back and the amount provided by your electricity supplier.
An off-grid solution works in a similar fashion with the exception that any surplus energy generated is provided to a bank of batteries for use when the sun is not shining. The design of an off-grid system is more complex as it takes into account load-analysis and correct battery sizing.
Note: in the case of a power cut, any on-grid solar system (excluding some hybrid installations) will cease to provide electricity to the switchboard. This is a safety feature to ensure that if the electricity was put back to the grid, engineers who might be working on the lines will not be electrocuted.
There is no off-the-shelf way to determine the best size of solar system. Ideally we wiull come to your place and discuss your requirements, analyse previous electricity bills or proposed building plans, evaluate how much of your current or expected energy consumption you wish to offset and examine the available area for installation, taking into account your budget.
As a quick guide,the average New Zealand household electricity consumption runs at about 7,500kW per year. A 2kW solar system, in Auckland, would deliver around 2,400kW of energy per year, and each kW of solar panels requires approximately 7 sqm of roof space for installation.
A roof top solar installation is best installed facing North but can still work very effectively on roofs facing East or West, as long as the roof is in a state of good repair.
A solar array can also be installed in a fixed position on the groun or on trackers which track th emovement of the sun throughout the day.
Similar options exist for our commercial customers however an additional possibility is to build a photovoltaic system into the structure of a car park thus protecting cars from the elements while generating electricity for the customer.
Sinewave will not only help you select the right type and size of solar system for your home, we can also show you how to make the most of the available power generated.
For example, as solar power is produced during daylight hours, it is most cost effective to run as many of your appliances during that time. Also things like spas and pools – filters and heating can again be run using solar during the day.
All our solar panels come with a 25-year performance guarantee while the inverters carry a 5-year guarantee.
Example based on standard household.