[{"@context":"https:\/\/schema.org\/","@type":"BlogPosting","@id":"https:\/\/sqmu.net\/guide\/2024\/02\/building-a-net-zero-house-in-the-uae\/#BlogPosting","mainEntityOfPage":"https:\/\/sqmu.net\/guide\/2024\/02\/building-a-net-zero-house-in-the-uae\/","headline":"Building  a Net-Zero House in the UAE","name":"Building  a Net-Zero House in the UAE","description":"Summarize with AIPerplexityChatGPTClaudeGeminiDeepSeek Let us together examine the kind of homes that can be built given the technology that is available to us today. I have a background of working in both the solar, and the smart home sectors and being an avid car enthusiast follow the developments in the electric vehicle sector closely. And […]","datePublished":"2024-02-07","dateModified":"2024-02-07","author":{"@type":"Person","@id":"https:\/\/sqmu.net\/author\/npvincent\/#Person","name":"Vincent","url":"https:\/\/sqmu.net\/author\/npvincent\/","identifier":81298481,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/d94cf1d4b33e5003c9d6729625a691370c0a6f7779f99eea52a9c190ec9eae9a?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/d94cf1d4b33e5003c9d6729625a691370c0a6f7779f99eea52a9c190ec9eae9a?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"SQMU"},"image":{"@type":"ImageObject","@id":"https:\/\/i0.wp.com\/sqmu.net\/wp-content\/uploads\/2024\/02\/render-1.webp?fit=1024%2C1024&ssl=1","url":"https:\/\/i0.wp.com\/sqmu.net\/wp-content\/uploads\/2024\/02\/render-1.webp?fit=1024%2C1024&ssl=1","height":1024,"width":1024},"url":"https:\/\/sqmu.net\/guide\/2024\/02\/building-a-net-zero-house-in-the-uae\/","about":["Abu Dhabi","Dubai","Guide","Ras Al Khaimah","Sharjah"],"wordCount":2914,"keywords":["Battery Storage","BIPV","Electric Vehicles","High ROI","Luxury","Smart Home","Solar","Sustainable Living","Townhouse","Villa"],"articleBody":"Summarize with AIPerplexityChatGPTClaudeGeminiDeepSeekLet us together examine the kind of homes that can be built given the technology that is available to us today. I have a background of working in both the solar, and the smart home sectors and being an avid car enthusiast follow the developments in the electric vehicle sector closely. And thus the home and community that I would build for myself would incorporate much of what I know to be available to us today. For several years I have been contemplating in my mind what this ideal home would look like. Initially, it seemed just a bit too expensive but now these technologies have matured and come of age, in other words, we are reaching the stage where a new technology reaches mass adoption. At this point, we are sitting on the precipice and now is the time because several sustainable development goals and national targets are looming over the horizon in 2030, which is essentially 7 years away.DALL-E Renderings of ConceptIt is beyond my capability to create visualisations of the concept, so I relied on DALL-E to render some concepts based on various inputs and here are the different iterations that came out of it. I chose the one I liked best to be the featured image of the post.To better describe the possibility of this new housing and lifestyle, I must first put in the correct context the relevant technologies that can contribute to it and the trajectory of growth in these individual sectors. There are other relevant factors such as building materials, building methods and preservation of ecosystems but these are not the scope of my expertise and thus not mentioned. The technology sectors that we will examine are Solar Photovoltaic Systems (Solar PV), Smart Home Automation, Battery Energy Storage Solutions (BESS) and Electric Vehicles (EV). Peripherally we will also consider relevant technologies such as LEDs, Air-Conditioning, Heat Pumps, Solar Water Heaters, Induction Cooking and Water Conservation.Solar Photovoltaic SystemSolar photovoltaic has progressed rapidly and the last decade has been truly transformative for the sector on a global scale. Solar PV is the fastest-growing part of the energy sector and has come into its own as a relevant part of the energy mix in electricity generation. As it pertains to residential solar, early adopters of Solar PV have already benefited from low-cost clean electricity. There are two important factors that every person involved in designing a house should know, first, the capacity of a solar panel has gone up from around 250 W per solar panel to nearly 700 W per solar panel, and second, solar panels are durable and thus have a 30-year guaranteed usable life. The 30-year durability means incorporating solar PV during the design of the house can ensure that this is an integral part of the house. For the sake of better envisioning the concept, for the moment, we will ignore high-rise buildings, these have solar solutions too but we can address that at another time. The constraints of solar PV are that the electricity generation is not throughout the day and the amount of roof or space available for solar panels. Solar panels need to face south in the northern hemisphere and one of the difficulties of retrofitting existing homes with solar panels is the unavailability of sufficient roof space. Because, since roofs are largely open, architects and designers litter the roof with equipment that they do not want inside the house. In the case of the UAE, this is usually an assortment of air conditioning outdoor units, water tanks, pumps and various pipes and conduits that are required. If we were to design the solar panels into the houses from the beginning we would optimise the entire design to maximise the number of solar panels that can be placed on the roof at the very least. We could even go as far as aesthetically incorporating solar panels that enhance the elevation of the home in general. There are solar panels available such that a skilled architect could place a solarium on the roof that can enhance the usability of the space. As the technology stands today, a solar PV system can generate sufficient electricity to meet all the demands of the house and electric vehicles.Battery Energy Storage SystemBattery energy storage systems seemed in the beginning to be an afterthought to solar but lithium-ion battery technology has progressed quickly, thanks to the rapid growth of electric vehicle technology. This has also had a positive effect on the prices of the batteries. The progress in the quality and affordability of lithium-ion batteries means that building a house with solar PV and battery storage can result in grid independence for the life of the house. Batteries are guaranteed to retain their full functionality for 7-10 years, progressively declining thereafter. The 10-year life might seem not entirely positive at first there are 2 things to consider, 1. the battery technology is continuing to progress rapidly and when the replacement needs to be made the next technology would be better and even more affordable, and 2. deteriorated electric vehicle batteries can be reused for use with the house. Battery storage is important because of its ability to enhance the viability of solar panels for the house. Solar panels can produce sufficient electricity for all the requirements of the house but only during the day and thus battery storage is the only method by which solar electricity generation during the day time can be used throughout the day. Incorporating the design of the battery storage and solar PV into the design of the house from the very beginning reorients the scope of the design. Battery storage also has a scope from a community development point of view – we are going to be connected to an electricity grid after all – to better manage the demands of the entire community in addition to individual houses. The electricity storage can be used to meet your neighbours\u2019 demand when they require it and vice versa thus improving the utilisation factor of the equipment.Smart Home AutomationSmart Home Automation technology adds a layer of sophistication to both solar PV and BESS in addition to the simplification and ease of everyday mundane controls of electrical and electronic equipment in the house. Automated lights that come on with sensors or voice instructions is almost the first thing that comes to mind but there is much more to smart homes. We can control, lights (including colours), water heaters, televisions, door locks & gates, shades, curtains, transparency of glass and air-conditioning. When used in conjunction with our mobile phones and other voice control devices we have everything at our fingertips and an instruction away. Security, control and cameras are another common expectation but that is just really scratching the surface. You have sensors for smoke, gas leaks, carbon-di-oxide levels, particulate levels (useful for persons with allergies or suffering from asthma), water leaks, humidity,  motion and temperature. Using these sensors and control devices smart homes become infinitely customisable and thus can be used to prioritise occupant preferences and particular needs. You could use a combination of conditions and requirements to control devices or provide alerts. For example, suppose you would like to keep an eye on children or the elderly, you could do that remotely and even have emergencies automatically called in the case of adverse events. In relevance to the management of electricity, your smart home can not only track the energy consumption of each electrical device, it could even provide you with alerts if certain devices are consuming more than they normally do or are operating at times that they normally shouldn’t be. And when you combine this granular understanding of your electricity consumption, occupant behaviour, occupant preferences (as relates to room temperature, ambient light, etc.), weather conditions, BESS charge level, electricity generation from solar PV and electric vehicle charge level; you have a solution where your house is seamlessly optimising the consumption of electricity without you having to give it a second thought.Electric VehiclesEVs complete the picture and provide for interesting enhancement to the lifestyle component of this scenario. The key to understanding the relevance of electric vehicles to this discussion on housing is the Vehicle-to-grid (V2G) technology that most electric vehicles are equipped with. A majority of EVs have a battery capacity of over 50 kWh. And, depending on the efficiency of their electric motor, the weight of the car and the design specifications, have a range of 300-500 kms on a single charge.Vehicle-to-grid technology allows the electric vehicle’s battery to be used as a source of electricity to your house, essentially to the electricity grid, hence the name. This makes the battery capacity of your electric vehicle essentially a bi-directional and indeed mobile component of your house’s electrical system. For a typical-sized independent home a 50 kWh battery should be able to support the electricity needs for an entire day, and vehicles with larger battery capacities such as 100 kWh should last up to 2 days. Certainly, there is more to it than simply connecting your car and running your home, the vehicle charging system installed at your home will need to be able to handle the bi-directional flow of electricity and the charging of the electric vehicle would also require the solar and battery storage solution to provide sufficient power capacity to support the larger load.The EV charging load for home charging units is typically 11 kW and up to 22 kW, which will make it one of the biggest loads in the house. At the design stage for the house, this requires consideration for additional and higher gauges of wiring capable of supporting the EV charging and bi-directional needs. But once again when we are designing the house for longevity, this built-in from-the-beginning approach ensures that the cost is absorbed and indeed provides value addition to the housing unit.Combining the TechnologiesWhen these 4 components are designed and incorporated into the house from the very start what you will have is a house and a lifestyle that runs entirely on renewable energy from the sun throughout the year. Even if you are still connected to the electricity grid, you could remain essentially net-zero by supplying back to the electricity grid what little you have drawn from it. At a community level, the entire community balances out the varying demand and supply requirements. Additional community-level solar PV, BESS, smart controls and public EV charges with V2G support bring all the same essential ingredients that apply to an individual house. Architectural & Engineering ImplicationsWhile designing the house one of the key components is to orient the house and the roof in particular to maximise the southern exposure while minimising the heat gain inside the house resulting from a higher southern exposure. From an architectural and design perspective we would have to fundamentally rethink how we design roofs and the components we place on the roof. Let us take for example the water tank, usually the highest point on a roof, we would now consider if a pressure pump would be a better solution with the tank at the ground or basement level rather than on the roof. Or, incorporate the water tank as part of the structure to support the solar panels. The same consideration is applied for the various pipes, out-door units of split air-conditioning et al. The more solar panels can generate electricity the better, is the general idea, but not necessarily so. The other component is also lowering the energy consumption. By default, we are certainly going to install the most efficient lighting, heating and air-conditioning equipment available. Air-conditioning in the UAE is typically the biggest consumer of electricity in any house and until electric vehicles came along the largest load. However, we are looking at technology such as inverter compressors having a positive impact on the electricity consumption vis-a-vis the cooling required. When we incorporate smart home automation, we can consider additional measures such as automatically turning off or allowing higher or lower temperatures when the rooms are unoccupied. We could even create automation that would draw curtains or shades across windows while simultaneously adjusting the brightness of lights in that room and even create alerts for open doors or windows.Water heating is also a large consumer of energy and that can be significantly reduced by using solar thermal water heaters and heat pump technology based electric water heaters. However, this involves plumbing of cold and hot water pipes throughout the house from one or two sources, instead of the typical cold water pipes and localised hot water pipes from the nearest water heater. Similarly, the usage of Induction stoves in the kitchen not only makes use of the most energy-efficient cooking technology but also eliminates the need for gas cylinders or piping. The removal of the gas component is safer, avoiding the possibility of gas leaks, it is also perfectly in keeping with the central theme of no fossil fuels, net-zero entirely renewable energy driven lifestyle. Estimating Electricity Needs Putting together these energy-efficient devices and possibly other passive architectural & aesthetic elements we could reduce the energy consumed and thus achieve a low energy use intensity. Energy Use Intensity is a measure of a house or building’s annual energy use per square metre, typical EUI for residential units ranges from 180-250 kWh\/sq.m.\/year. If one were to lower that, as has been done before in the UAE, we could even achieve 100 kWh\/sq.m.\/year, essentially a 200 sq.m. villa could have consumption as low as 20,000 kWh\/year. This could be comfortably generated by a Solar PV system with a 12 kWp capacity, requiring no more than 40 sq.m. of roof space, which is less than half of the possible available roof space if the villa has 2 floors. Electric Vehicles will also be an electricity consumer, so considering typical daily usage of 100 km at an efficiency of 0.2 kWh\/km for the year we arrive at 7,300 kWh. Typical villa households in the UAE would have at least two cars and therefore if we consider 2 EVs we would be looking at approximately 15,000 kWh per year. This increases the Solar PV system capacity to 22 kWp, requiring 75 sq.m. of roof space. Incorporating BESS, smart electricity monitoring & management and adding the V2G capability of the EV we can arrive at a required battery storage capacity of about 50 kWh. If the full battery capacity of the EV is available, it will provide an additional 50 kWh. This would mean that the entire house could run entirely on BESS & EV without an electricity grid or sunlight for more than 2 days. In addition, the EVs could be used to transport stored electricity from external public charging points back to the house to power the house. In SummationWhen we look at the numbers and the technology we realise that this is an entirely feasible project. And so, let us finally address the cost of all this technology. Costs will vary depending on the quality and size of the equipment that is used, and thus, for the sake of understanding, I will attempt to put the estimated cost as a percentage of the purchase cost of the house. The cost of a villa in the UAE is driven largely by location and thus we are only looking at a median price for the sake of this analysis. For a typical 200 sq.m. villa Solar PV is likely to cost about 5% of the cost of the house and the battery storage an additional 10%. Smart Home & Home Automation is likely to cost no more than 1% of the cost of the house. In that sense, smart home automation is low-hanging fruit for future homes. The requisite electrical vehicle bi-directional charging infrastructure is likely to be an additional 2%. In total let us say that incorporating these technologies will add 20% to the cost of the house. With these solutions, there is always the question of value for money spent vis-a-vis savings after the retrofit. However, if the incorporation is done from the design and thus included in the construction stage we are talking about the entire equipment being priced into the purchase cost of the home and thus an integral part of the home. I would go so far as to contend that today these technologies should be taken as granted to be part of the house like we take plumbing and electrical wiring as granted in every house. Unsurprisingly the cost to build or purchase such a house is at par with if not marginally, and justifiably so, higher than a typical house. And, if we realise the perspective that this is a house with a serviceable life of 30 years or longer which for the entirety of its usable life will not require fossil fuels or possibly electricity supply from the grid it is truly remarkable. And to be at this time and place of inflexion in our lifetime is wonderful. Now architecturally and from a community planning perspective, many additional components can enhance and indeed further embellish the value of such a house but I believe the point has been made and hammered through.Share with friends:\t\t\t\tShare on Telegram (Opens in new window)\t\t\t\tTelegram\t\t\t\t\t\t\tShare on WhatsApp (Opens in new window)\t\t\t\tWhatsApp\t\t\t\t\t\t\tEmail a link to a friend (Opens in new window)\t\t\t\tEmail\t\t\t\t\t\t\tShare on LinkedIn (Opens in new window)\t\t\t\tLinkedIn\t\t\t\t\t\t\tShare on Facebook (Opens in new window)\t\t\t\tFacebook\t\t\t"},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Guide","item":"https:\/\/sqmu.net\/guide\/#breadcrumbitem"},{"@type":"ListItem","position":2,"name":"2024","item":"https:\/\/sqmu.net\/guide\/\/2024\/#breadcrumbitem"},{"@type":"ListItem","position":3,"name":"02","item":"https:\/\/sqmu.net\/guide\/\/2024\/\/02\/#breadcrumbitem"},{"@type":"ListItem","position":4,"name":"Building  a Net-Zero House in the UAE","item":"https:\/\/sqmu.net\/guide\/2024\/02\/building-a-net-zero-house-in-the-uae\/#breadcrumbitem"}]}]