Canadian Solar… Simply select the type of car or motorhome you have, and select your towing unit if you’ll be using one. This is a basic method, best used at a local level by a trusted solar power installer who has a solid understanding of the local area. Solar Calculator. Then hit Get Recommendations. For the example, if 500-watt … The easiest way to figure this out is to look at past electricity bills, which should tell you how much power you've used in the previous month or quarter. The average installed system size is around 3.6 kW. Online store by, LOW FIXED FREIGHT FOR ALL NEW ZEALAND ORDERS. However, matching a system size to your power demands won't eliminate your power … Here’s an example from Solar King in Takapuna: For small to medium consumption residential customers, a ‘rule of thumb’ approach can be appropriate in scenarios where some of the following items apply: If some of these items apply, then the risk of dramatically over or under sizing the solar system is pretty low. How Many Solar Panels Do You Need to Power Your Home? This method can be inspiring for homeowners, dreaming of generating 50% of their own power usage. Based on their experience with other customers and their solar performance, they can recommend a certain size for your installation. Lets work out the Watt-Hours we'll be using, our load … There is also a place for trial and error, ‘rule of thumb’ and local experience. A home that consumes 1,000 kWh per month will normally need between 20 and 30 solar panels. Let me demonstrate with a real life example. There has recently been an uproar from solar customers in Australia as their government has moved away from subsidising solar with artificially high buy-back rates. Solar panels convert the light from the sun's rays into electricity, so you don't need … For my example, it looks like I will save $1,184.25 (highlighted). Look at whether you can realistically shift load to fully utilise your generation. Complementing this range are the REDARC Sine Inverters, Regulators and In-Vehicle Chargers, Solar Regulator Cable Kits and other accessories that will create the perfect solar power setup. The most important point to remember is that your solar system output should match your consumption habits. “What size solar system do I need?” The size of your solar power system, and therefore the number of solar panels you need, should be informed by your electricity usage patterns and what you want to achieve.. It’s just not accurate enough, and there is a serious risk of exporting significant power, not being able to self-consume and having a detrimental effect on system economics. Here’s my household consumption from Monday this week. Once you have this data, you can then make an informed decision whether this load can be shifted (manually, or using a smart controller) to the middle of the day to benefit from solar. To start with we work out what sized batteries we need and then what size solar panels we need to charge them. The importance of matching generation to consumption is known as also referred to as ‘self-consumption’. If you can talk to installers intelligently around generation output, you are one step ahead of the game. The perfect system size will depend most of all on you. (2) They are particularly good for our most sunny regions, such as Northland, Auckland, Nelson, Bay of Plenty and Marlborough. As it is a data-driven approach, using your actual power bills, it’s also often the method adopted by online solar calculators and panel manufacturer websites. The number of solar panels that you need depends on the system size that you select. They will know how previous installations have performed, how much customers they are saving on their power. Ideally, we’re looking for a north-facing roof or elevation, free from shading and at a pitch of between 10 and 40 degrees. Your actual consumption, you will be able to see the influence of large energy consuming appliances such as heat pumps, air-con, pool heaters, hot water cylinders and lighting. You have a solar system controller, which automates this load shifting. How much can you afford to invest in a solar power install? This ‘50%’ figure is also referred to as the ‘grid offset’, i.e. The typical homeowner will need 28 – 34 solar panels to cover 100% of their energy usage (dependent on location and roof size). Which in Auckland equates to around 3 kW of optimally placed solar generation. This is the gold standard for sizing a solar system and is especially important if you are using a lot of power, such as a large home or business premises. Ask them about the assumptions made when they demonstrate a five year or seven year payback period. When choosing the best system size for your property, there are three key factors you will need to determine: The proportion of your electricity usage you are aiming to meet with solar energy. Historical usage data from your power meter is reviewed to understand your typical daily and seasonal power usage. A friend living north of Auckland has solar. If you want to install solar panels, you should weigh up the potential costs against the potential savings. Here’s another example from  Energy Matters in Australia, which starts to also consider your home appliances. Probably the most common means of sizing a solar installation is look at recent power bills, and then sanity check against the solar installer’s experience or ‘rule of thumb’ guide. What you should aim to determine is the ideal amount of generation you require from your solar power system. You can't correctly size your solar PV system unless you know how much electricity your home uses. So… all I am saying is beware or the small print and assumptions when a solar panel manufacturer or installer quotes you savings and payback periods. Click here to use our interactive solar power system calculator or to find your local solar panel technician. You should aim to use your solar power, not export it. A 6kW solar panel system produces enough electricity to match the average New Zealand household's consumption of grid produced electricity (which is 7,000kWh a year). If you buy more than one panel, all shipped panels will be from the same manufacturer. Next you choose the auxiliary battery bank size you’ll be running. By utilising battery storage (currently not economic), altering your power usage habits, using a smart solar controller or all of the above. Those solar panels used for residential purposes range from 150 watts to 370 watts per panel, depending on the panel size efficiency and cell technology. Solar System Output Calculator; ... Write down how big your solar system would need to be in kW. This will maximise the return on your solar investment and avoid your panels being just an expensive ornament. Is it likely to need painting or replacement anytime soon? Finally select all the appliances that will require power. For residential at least. Once you have determined the generation required from your solar system, the next step is to look at the practicalities of installation and cost. I work from home during the day, but our consumption remains pretty low apart from the typical evening peak. The solar panel calculator can help you work out what equipment you need to fully charge your next camping, caravaning or off-road adventure. Determine how many solar panels you’ll need One solar panel produces about 1.24 kWh per day. Solar Panel Sizing Calculator For In-Ground Pool Heating. ... To help people do the maths, it has put a solar calculator on its website. Only a pittance paid for exported power. Different panels will have different watt ratings, so you have choices about which ones to purchase. A typical American home will need 14-36 … Other factors such as peak load, shade, location, available panel space, and seasonal use need to be taken into account. In NZ, although you might pay 25¢ for each unit of power you from your power company, if you export excess power during the day you’ll only receive a paltry 7¢ – 8¢ for each unit sold back. Read from the start, or use the menu to skip to the sections you are most interested in. After rounding it up we receive that you need to buy 21 solar panels. I want to ensure that you get the most out of your solar power system and don’t get ripped off. At the end of 2016, there were around 11,000 … Equally, when sizing the output of your solar power system there is no substitute for actual power usage history. Off Grid Solar Calculator -Off Grid Solar in this case refers to battery stored solar panel systems, either connected to utility or standalone. But realistically, in my experience, most people go back to their old habits after a while. Sizing your solar investment based upon actual consumption is the best way to avoid over or under-sizing. Save Power | Save Money | Save the Planet. Please, use the update button below the calculator body to update the … A standard panel … A 5kW solar system can be made up of … 700 x 12 = 8400 kWh per year. As an engineer,  I think there is a place for detail, analysis and optimisation. The recommendation could be for a solar power system that generates 50% of your average monthly energy consumption. It can also be used to provide misleading economics and savings calculations. Residential installations in NZ can vary from a small 1.5 kW installation, up to sizable three-phase solar systems of 8 – 10 kW. One major restriction may be the available, suitable roof area for your solar installation. So it’s important to be realistic. Most of New Zealand is suited to PV solar panels with good sunshine hours annually. From this you can figure out the average daily usage. Be it six days or six months. At the end of 2016, there were around 11,000 residential and small commercial solar installations according to the Electricity Authority. All rights reserved. Or better yet, look at your actual historical consumption and make a fully informed decision. 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