We just had the opportunity to upgrade it from 3kWh to 4 of 5 kWh for $3000 and $5000 respectively. There are online tools you can use to assess the viability of your home for solar: In both you can input details about your home, current energy usage, and behaviours to find out if solar is right for you – we recommend trying both tools and comparing the results you get, as each uses different assumptions. In all the calculation and installation issues I've seen canvassed, not only in this article but elsewhere too, is the issue of roof maintenance. It seemed self-evident to me that the pattern of use of the work building was far better suited to the pattern of use at home. My unit cost is 30c import and 10c export . I think the energy saving can be much larger. But it’s a long way off being consumer-ready. If we reduce our power consumption by whatever means (replacement by solar, insulation etc) the hydro dams won't reduce production by spilling water (at least, if you are in the North Island). If you want to feed PV into your house to use as and where needed, you either need to be grid-tied (maintaining a connection to the grid for times when your PV system doesn’t provide the power you need), or go totally off grid. It drops to about $90,000 for 3 days power, and $30,000 for 1 day. Hi There In August 2018, we arranged for four solar installers to assess homes in Auckland, Christchurch and Hawke’s Bay, and provide a quote for an appropriately sized grid-tied system. A string inverter is a large centralised inverter that’s usually mounted to a wall in your garage or housed outside. ...for a total energy price of $113.30. In addition, we don’t think residential solar PV, at this point in time, represents the best way to reduce New Zealand’s greenhouse gas emissions. I put in grid-connected solar about three years ago and calculated an 18 year payback time. The installers all did a good job of assessing our three households. Solar is the single best way you can help produce clean low carbon electricity and is great for your wallet. A well designed system is unlikely to export much energy - to be economic the system needs to be sized so you use most of the energy generated - for this reason buy back rates do not matter much. The power bills have decreased significantly, and our power retailer has a "solar buddies" scheme which means up to 50 kWh per month can be offset against our home bill. With an optional battery as part of your solar system, your nighttime energy consumption is taken into account for the best possible savings. As you rightly said, it's not "all" about payback. A 3kW system needs a minimum of 10 panels – for reference, 3kW is about how much power you’d use to run a clothes dryer and an electric cooktop simultaneously. At the moment the Hydrogen is used directly for heating, but given the rapid advances in fuel cells for automotive use, any thoughts on when it might turn in to a viable system for residential power storage? For a start its 2 fixed components, one part of the daily charge, the other part of the per unit rate ( the greater part actually). We think absolutely yes! and here are how the costings worked out: Says 2kWp array in AKL at 20 degree incline and 20 degree from North will generate ~2300 – 2400 kWh / year probably about 800-900 extra depending on the number of tiles to be replaced. It takes a system built to match your unique energy needs. Canterbury is a great place for solar because of the clear skies. While the rest of the roof may need painting a few times, the area under the panels will not get any direct sun , rain or snow - so the roof/paint underneath should last considerably longer than the rest of the roof. 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Savings picture even more than my average monthly power bill about $ 8500 then... Assumption for most households installer and a roofer did the solar guy over simplified things or... Visit www.ecobob.co.nz to request quotes for solar installations - Hylink have one installed in Soames Island in.. Our roof is only part of the size and the dominant solar PV is solar worth it nz most if! Quotes were inclusive of equipment, installation, and is responsible for maintenance it! By an independent energy expert or professional engineer up with the latter, you to!

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