If I plan to construct a home within the subsequent three-four years, ought to I be critically contemplating a house solar energy answer as a substitute of relying solely on the nationwide grid? Will it save me cash and assist me contribute to combating carbon emission or is it only a loopy concept?
To most of us, solar energy options sound like a rural off-grid affair. It’s extremely pricey. It simply powers up a few lights and a fan. It doesn’t run 24 hours a day. It is solely meant for individuals who can’t have electrical energy of their space within the close to future.
In cities, solar energy appears ridiculous. When a decade again, the federal government made it obligatory for metropolis dwellers to put in a rooftop photo voltaic panel as a way to qualify to get new grid energy connections, many thought of it an idiotic tyranny of the authorities. It was as a result of the photo voltaic options have been pricey and truly you can not do a lot with them. Folks didn’t set up the panels critically. They faked it to get grid connections that present electrical energy at a a lot lower cost.
And but, I believe if somebody is contemplating constructing a brand new dwelling, they need to think about a hybrid system of photo voltaic and grid energy. Why? Due to the best way the grid energy value is rising and solar energy options reducing – I can see grid energy is about to lose its attraction to dwelling customers.
You possibly can even have 10 kilowatt of electrical energy or extra from photo voltaic dwelling techniques immediately. You possibly can run air conditioners, freezers, electrical ovens and different issues on a system that comes with a 5- to 10-year assure. In contrast to the puny photo voltaic options present in Bangladesh for rural off-grid clients, these photo voltaic options are getting fashionable in city areas in China, the USA, India, Australia and even India. They’re both doing it stand-alone or making it a hybrid answer.
Solar energy both saves them month-to-month electrical energy payments or provides them the satisfaction that they aren’t contributing to carbon emission as they did earlier than.
Whereas solar energy remains to be approach costlier in Bangladesh than in different international locations, it is rather low cost in India, China, the UK and lots of different nations. Our closest neighbour’s common solar energy manufacturing value is now solely ¢3 (Bangladesh’s photo voltaic value ranges ¢12 and above whereas grid energy ¢6.5), China’s value ¢4, UK ¢1-7. These prices will lower additional within the coming years.
However to put in a solar energy system in your city dwelling, you would wish an inverter and a battery system. There was huge progress in these options and you should purchase a modular or mounted capability inverter and battery system.
As an illustration, Tesla makes a glossy Powerwall with 13.5kWh energy storage capability. That is designed to look so cool that you just’d like to have a look at it as part of the constructing structure. The Tesla Powerwall, which makes use of a hybrid system (grid plus photo voltaic), prices $8,500 earlier than set up within the US market.
Then there are techniques which can be cheaper and modular – which means you possibly can enhance the capability as you later want. There are a number of dependable Chinese language manufacturers resembling Goodwe Lynx, Huawei and BYD so that you can discover as properly.
Even in India, you possibly can have a 10kWh off-grid system with a 1,000 sq-ft rooftop for photo voltaic panels, at simply Indian Rs9.5 lakh!
My take is that within the coming years, these options will present city customers with electrical energy at a value cheaper than grid electrical energy. Grid electrical energy would possibly turn out to be extra targeted on industrial and business use the place energy demand per buyer is way larger – and the solar energy system is not going to successfully be capable of deal with that within the subsequent decade.
The period of pricey energy
The period of low cost electrical energy had ended greater than a decade again when the federal government started rolling out a collection of energy vegetation on an emergency foundation to finish unending load shedding. These emergency vegetation have been costlier than typical ones. And in addition, the brand new typical energy vegetation additionally steadily grew to become costlier attributable to numerous elements.
We now have common electrical energy because of authorities initiatives. However we additionally need to cope with costlier electrical energy as a result of the price of energy era has greater than doubled within the final decade. Again in 2010, the per kilowatt (or per unit) energy era value was simply Tk2.5. This has gone as much as Tk4.47 per unit for public sector energy era and Tk8.34 per unit for fast rental vegetation.
An essential side of this enhance is our reliance on imported major vitality to supply electrical energy has additionally gone up considerably. A decade in the past our imported major vitality was simply petroleum. Right now we import Liquefied Pure Fuel (LNG) from the Center East and coal, on prime of petroleum. Plus we additionally import electrical energy from India.
This implies, our vitality sector grew to become extra tied to the unstable worldwide vitality market that goes up and down primarily based on demand-supply and different elements. In latest occasions, costs of each oil and LNG have gone up. This implies the federal government is incurring large losses whereas importing these fuels. This loss is being coated by heavy subsidies for the Energy Growth Board – the primary bulk purchaser of all energy.
Proper now, we’re paying the federal government a mean of Tk5.64 per kilowatt energy. As the federal government is incurring a heavy loss, the facility board is suggesting a rise within the common energy tariff to Tk8.58.
Individuals who use quite a lot of electrical gear together with AC, freezer, oven, computer systems and different devices within the metropolis, nonetheless, face a punitive energy tariff in the event that they fall into the very best slab customers. For those who use greater than 600 items a month, your per-unit value is Tk11.5. In different phrases, a prime slab person pays Tk6,900 and above per 30 days.
Going inexperienced is the in-thing
Provided that the grid energy will proceed to depend on imported gas and likewise our solely large native useful resource, pure gasoline, is about to utterly deplete by the early 2030s (until we make main new gasoline discoveries), going inexperienced could be the wisest factor for future dwelling builders.
If we think about even the Indian photo voltaic answer, going for a house photo voltaic answer has turn out to be a viable choice. Photo voltaic options will proceed to turn out to be so low cost that inside 2030, grid energy is more likely to be costlier than solar energy.
If extra properties go for photo voltaic options, blended with grid energy to extend reliability, it will additionally assist the federal government in guaranteeing larger vitality safety. For you, the satisfaction would come from each saving cash and contributing to lowering carbon emissions.