Energy Archives - Page 7 of 66 - Living Off the Grid: Free Yourself

Community

Cooking with the sun

There are several different ways to use the sun in cooking, aka solar cooking or solar ovens. If you live in a sunny place, the desert, anyplace with unobstructed sunshine, you can use a solar oven to cook most meals.

There are parabolic cookers, these are like using a hot grill, you pretty much have to be right on top of it all the time to cook with these.

There are panel cookers, these use a silver (usually mylar) foil covered cardboard, the DIY ones are often made from a window shade made for vehicles. The nice thing about these are they are very portable, light and easy to set up. The bad thing about them is they don’t reach and maintain a very high temperature, and being light weight, they can blow away in wind.

The third major kind are box cookers, these work just like a small oven, they can be made of a cardboard box, or for a more permanent solution, made of wood or plastic. It is essentially an insulated box with a glass top and to make them work even better, reflectors are added to the top. This is the kind I like best.

I have scoured YouTube in search of the best build, I see many mistakes being made, mainly in the materials used in building them, you don’t want to use anything that will off gas or become toxic when it becomes hot, using styrofoam, some types of glue, some kinds of wood even will out gas toxic fumes when heated, I cringe when I see these being used.

I found one video that really jumped out at me, though I’m sure there are many more, I liked this one. The first video shows how it’s built, I will admit that my ADD struck and I had to move the video along a bit, but the build is solid. The second video shows a whole chicken being cooked in this solar oven. Enjoy!
https://youtu.be/yPRkwnpv-C8

https://youtu.be/uMh3N8lq1Ik

…

July 3, 2017 1 Comment

La Crisis de Energía en Sudáfrica

Las autoridades locales en Ciudad del Cabo, Sudáfrica, enfrentan una crisis energética debido a que el robo de electricidad, las facturas impagas y el cambio a la energía renovable ejercen presión sobre las compañías eléctricas. A pesar de que la economía y la población han crecido, la ciudad espera vender mucha menos electricidad de la que tiene desde 2006.

Los paneles solares de electricidad están apareciendo en los techos de todas las ciudades de Sudáfrica, dejando a los municipios de Thembelihle en el Cabo Norte a Mantsopa en el Estado Libre del Este en problemas, y está empeorando.

Leslie Rencontre, Directora de Electricidad en Ciudad del Cabo explicó el aumento en los precios al Regulador Nacional de Energía de Sudáfrica (NERSA) la semana pasada: “Donde se ve una disminución en las ventas de electricidad, que estamos viendo debido a los altos precios y la introducción de la energía renovable, el aumento en la tarifa de electricidad tiene que tener eso en cuenta “.

Como los nuevos datos confirmaron la semana pasada, los municipios de todo el país dependen en gran medida de las ganancias que obtienen de la reventa mayoritaria de energía Eskom a sus pueblos y ciudades. En Johannesburgo, aproximadamente la mitad de las cajas de electricidad prepagas de la ciudad afirman que los hogares no han usado electricidad. Se cree que las personas han dejado de pagar por la electricidad debido a los precios más altos.

– Nos enfrentamos al desvío masivo de medidores y al sabotaje de contadores, Quentin Green, el jefe ejecutivo interino de la agencia de Johannesburgo, City Power, le dijo a NERSA.

Él explica que entre la pérdida de ingresos de tales conexiones ilegales y la necesidad de mantenimiento, en parte causada por la carga de esas conexiones ilegales, no pueden sostener el negocio.

Para la mayoría de los gobiernos locales, cerca de un tercio de sus ingresos proviene de las ventas de electricidad, donde el dinero se destina a otros servicios vitales como las carreteras.

A medida que aumenta el precio de la electricidad, también lo hace la cantidad de personas que eligen vivir de la red y usan la energía solar para obtener electricidad. Estas pequeñas soluciones de almacenamiento de electricidad son cada vez más atractivas, pero esto puede llevar a absurdos.

– Una de las principales amenazas que discutimos anteriormente con NERSA es que estábamos encontrando que los hogares de mayor nivel podían reducir su consumo de electricidad y luego estaban accediendo a subsidios dirigidos a los indigentes, dijo Rencontre, refiriéndose a los paquetes destinados a hacer que más electricidad sea accesible. el más pobre de los pobres.

Ciudad del Cabo, Johannesburgo y una docena de otras áreas municipales han comparecido ante NERSA para exigir y pedir que se les permita aumentar la cantidad que cobran a los residentes por la electricidad. En términos de directrices NERSA, las autoridades locales pueden …

June 21, 2017 No Comments

Energy

Battery costs plummet

Huge advances aimed at the Electric vehicle market are slashing battery costs, changing the way the power grid works and bringing benefits to off-grid communities and industries.
As the world prepares to spend trillions on new renewable energy installations, the cost of storing power is plummeting. Battery costs are the biggest single obstacle to the potential for living and working off the grid, because reliable power storage has been the missing element until now.

In its latest annual report released this week, Bloomberg New Energy Finance (BNEF) forecasts trillions of investment in renewable energy worldwide in the next 10 years. The need to store renewable energy (along with the coming boom in Elelctric Vehicles (EVs) has led to advances in battery technology and a 75% fall in the cost of batteries since 2010.
As we first reported over two years ago, plans to mass-produce car batteries are behind much of the progress.
Technology is also allowing us to be more intelligent in the way we consume electricity. One interesting idea in the electricity market now is “demand response”. Instead of building capacity to provide extra megawatts, we instead use “negawatts”— forgone power consumption. This already works well with cooling, heating and pumping, which are mostly not time-sensitive. If you run greenhouses, or cold-storage equipment, your only priority is keeping the contents within the right temperature range. Whether the machinery comes on at five minutes to the hour, or ten minutes past, does not particularly matter.
But to the electricity networks, this flexibility matters a lot. When demand spikes — say on winter mornings — they no longer need to use the dirtiest and most expensive generating capacity, such as banks of diesel generators, to keep the lights on. Instead they pay companies to postpone power consumption to a more convenient time. The result is greater efficiency and lower costs.
Increased use of electric vehicles will create even more flexibility: they can charge overnight on cheap wind power, and even send electricity back into the network when needed.
This is not good news for the utility companies. They like big, expensive investments because, in a regulated market, they can dump the cost — plus a profit margin — on the consumer. The question that no country has answered is how to manage the transition between the expensive, old-style power system and the decentralised, flexible, low-cost (and low-carbon) future.
BNEF’s annual energy outlook, published this week, forecasts $7.4 trillion (£5.8 trillion) of new investment in renewable energy by 2040. That is an encouraging leap on previous predictions — but still short of the nearly $13 trillion investment in zero-carbon power it reckons is necessary.

Even without the fall in battery costs, coal is ailing even in countries without abundant natural gas. China and India are turning away from the black stuff, partly to stem public fury at air pollution, but also …

June 16, 2017 No Comments

Energy

Black Hills Energy Cuts Renewables Payout

Last week the South Dakota Public Utilities unanimously approved a 19 per cent reduction in pay for renewables – that is the generation credit rate Black Hills Energy pays to small renewable energy producers. This is a kick in the teeth to all who invested in renweable energy thinking they could forecast the payback time and the hit on their own personal finances.

The generation credit rate will be set to 2.75 cents per kilowatt-hour, from the current rate on 3.32 cents.

The commissionion says it may also wants to set generation credit rates differently for the kinds of fuel used to create it – so coal will get less and solar will get more.s. The decision to base the credits by sources will come no later than 2019.

“Black Hills Energy should broaden its electricity sources. About 90 per cent comes from burning coal”, he says.

Nelson praises Richard Bell, an engineer and customer of Black Hills Energy, for bringing the concept to the commission. Bell is one of 35 small producers who receive credits on their electricity bills for the electricity they supply to the company.

Small producers might drop out

However, due to the credit reduction, Bell is worried that small producers will drop out, and explains that many people are going to go off the grid if they are going to be compensated at such a low rate.

The commission voted 3-0 to accept the Rapid City company´s proposal. The reduction will take place on June 1st.

Not happy with Black Hills Energy´s deal 

Joining Bell at the witness table was Jay Davis, a Rapid City lawyer who has a renewable-energy system on his house and receives generation credits from the company. He invested roughly $11.000 to install the panels and received a 30 per cent federal credit.

“We wanted to set a good example for the rest of the community, a positive and forward looking example”, he says.

Davis is not pleased with the deal he is getting from Black Hills Energy at the moment. He explains that he pays 9.98 cents per kilowatt-hour for electricity at his house, but gets 3.32 cents credit for the electricity produced by the solar system on his house. Worse, he says, the company charges him $9.25 monthly because he is a customer and another $12.99 per month in cost adjustments.

Manager sees no reduction of coal in near future

Lisa Seaman, Black Hills Energy´s manager of resource planning says she does not see the company reducing their dependence on coal very much.

“Not in the near term”, she states. “Right now the utility has enough electricity without the 35 to meet the needs of customers”.

Nelson sees Seaman´s point, but says the company needs to start taking the small producers into consideration in the future. South Dakota’s voluntary goal by utilities is 10 percent for renewables. Black Hills …

June 11, 2017 No Comments

Solar

South Africa Power Crisis

The local authorities in Cape Town, South Africa face a power crisis as electricity theft, unpaid bills and switching to renewable energy puts pressure on the electricity companies. Even though the economy and population has grown, the city expects to sell far less electricity than it has since 2006.

Solar electricity panels are appearing on rooftops all over the cities of South Africa, leaving municipalities from Thembelihle in the Northern Cape to Mantsopa in the Eastern Free State in trouble – and it is getting worse.

Leslie Rencontre, Director of Electricity in Cape Town explained the increase in prices to the National Energy Regulator of South Africa (NERSA) last week: “Where you see a decrease in electricity sales, which we are seeing because of high prices and the introduction of renewable energy, the increase in the electricity tariff has to take that into account.”

As new data confirmed last week, municipalities around the country rely heavily on the profit they get from reselling mostly Eskom power to their towns and cities. In Johannesburg about half of the city´s prepaid electricity boxes claim that the households have used no electricity. It is thought that people have stopped paying for electricity due to the higher prices.

– We are facing massive bypassing of meters and sabotaging of meters, Quentin Green, acting Chief Executive of the Johannesburg agency, City Power, told NERSA.

He explains that between the revenue loss of such illegal connections and the need for maintenance, some of it caused by the load from those illegal connections, they cannot sustain the business.

For most local governments, about a third of their revenues come from electricity sales, where the money is put into other vital services such as roads.

As the price of electricity increases, so does the number of people who choose to live off the grid and use solar power to get electricity instead. These small electricity storage solutions are becoming more and more attractive, but this can eat to absurdities.

– One of the key threats we discussed with NERSA previously is that we were finding higher-end households were able to reduce their electricity consumption and were then accessing subsidies aimed at the indigent, Rencontre said, referring to packages intended to make more electricity accessible for the poorest of the poor.

Cape Town, Johannesburg and a dozen other municipal areas have appeared before NERSA to demand and beg to be allowed to increase the amount they charge residents for electricity. In terms of NERSAs guideline local authorities can increase their prices by about 2 per cent, but must get permission for anything above that. Last week municipalities askes for a hike of more than 20 per cent for business customers.

– We really hope and believe that NERSA will look favourably on this application,” David McThomas, a manager for the Breede Valley district in the Western Cape said.

In …

June 8, 2017 No Comments

Energy

Govt warned must transform UK national grid

A new report from think tank Green Alliance warns that the UK Government needs to help the country’s power system catch up with the growth of electric vehicles and solar by transforming the UK national grid.

At present, the UK national grid is woefully prepared to meet the demand on the system by increasing solar power systems and electric vehicle takeup.

More consumers are choosing to buy small-scale renewable energy technologies according to the report, which warns that consequences of not upgrading the grid urgently could be disastrous. If no action is taken, just six electric cars charging in close proximity at peak time could overload the grid and disrupt the local power supply.

This in turn would provide ample ammunition for critics of renewable energy that want to see clean energy growth stopped in its tracks. At present, one in five of the UK’s local grids are unable to accept more distributed energy like rooftop solar. However, if the Government designs a smarter power system now, electric car batteries could store enough power to keep the UK’s lights on for 7 hours at a time by 2025, virtually eliminating blackouts, and distributed energy could save customers over £1.6 billion per year. Growth in clean energy development is moving increasingly fast.

By 2020 IKEA will be a net exporter of its own solar and wind energy, and the falling price of battery storage could soon allow UK households to operate off the UK national grid for months at a time.

The report predicts that the UK will reach a tipping point as soon as 2020, when government will lose the ability to control the speed of small scale energy deployment. Similar tipping points outside the UK have seen mixed responses: In Nevada, attempts to clampdown on rooftop solar’s effect on the local power system were met with ferocious consumer backlash, ultimately leading to a reversal of new less favourable tariffs and the grid administration being sacked. This should be a warning to the UK Government, but how much notice will it actually take? In California, smart EV charging infrastructure has been used to keep the lights on at peak times and given that 40 per cent of drivers would consider buying an EV, the UK should follow California’s lead.

Intervention needed

The report says four main government interventions are necessary to get the benefits of small scale energy:

*A new independent system designer should be employed to ensure small scale energy is well integrated.

*Distribution network operators (DNOs) should be transformed into distribution system operators to actively integrate EVs and solar in a smart network.

*Small scale technologies should be enabled to provide system flexibility, for instance through smart charging of EVs.

*Automation and aggregators should be adopted to make more flexible ‘time of use’ tariffs attractive to customers.

“The energy transition is unstoppable and will in part be …

April 18, 2017 No Comments

Solar

Solar sheds for sale

UNITY, Maine – 11 April – For Joas Hochstetler, manager of the Amish-owned Backyard Buildings, the idea of manufacturing a solar shed equipped with solar panels was always in the back of his mind.

After all, as part of their mission Hochstetler’s family and others in the Amish community that has settled in Unity use solar power technology in a variety of ways, from powering lights on their carriages to charging power tool batteries.

“Solar is pretty passive, there’s no moving parts, you don’t have to feed it, it doesn’t take gas,” Hochstetler said. “We’ve already made the decision to not be on the grid […] so the benefits of solar for us are just endless.”

Despite perceptions of Amish communities being wary of technology, off-grid solar power technology offers a way for those in the community to stay off of the mainstream power grid in a way that is minimally intrusive to their lifestyle. Hochstetler said that Amish people were some of the early adopters of solar.

So when Matt Wagner of Insource Renewables approached him in January about teaming up to produce a shed that was equipped with the same solar technology found on traditional roof-mounted systems, Hochstetler was sold. After all, the sheds he makes were already solar powered – in the sense that solar is his only power source.

“We’ve talked about it before but didn’t have a reputable company to collaborate with, or the solar expertise,” Hochstetler said. “I like the principle of solar, so I would gladly do work in a field that will generate more solar power for the state.”

For the last six years, Backyard Buildings has been manufacturing a wide range of portable structures including storage sheds of varying sizes, animal shelters and even small cabins. In some instances, Insource Renewables was contracted by customers of Hochstetler’s to install heat pumps in large sheds they’d purchased with the intention of using them as off-grid camps.

Wagner initially proposed the idea of just collaborating on installing heat pumps in some of the buildings before they were sold, and the idea quickly morphed into making storage-type structures with solar panels mounted on the roof.

For both parties, the opportunity to work with another local company to bring a new solar energy option to their customers was a boon. “What we found is we can basically deliver the same size solar array we would put on someone’s roof onto this solar [shed] building for about the same cost, and you get this great shed. It’s sort of a no brainer,” Wagner said.

With Insource Renewables bringing the solar expertise and Backyard Buildings bringing the construction know-how, prospective customers are able buy a shed that is outfitted with a solar array that can capture enough energy to power their entire home, as well as a soundly constructed shed that can serve a range of …

April 10, 2017 No Comments

Solar

Spain’s Sun Tax to be axed

In October 2015, Spain’s Council of Ministers approved a controversial tax on those using electricity produced by their own solar installations. However, a new government says solar panel owners could soon see the back of the so called sun tax.

What is the sun tax?

This legislation causes those with self-consumptive photovoltaic systems to pay the same grid fees as those without solar panels. This covers the power contracted from an electricity company. But they also have to pay a second “sun tax” which means solar panel owners pay for the electricity they generate and use from their PV systems, even though it doesn’t come into contact with the grid.

There are other facets of the legislation which also caused more outrage. Photovoltaic systems up to 100 kW are not able to sell any excess electricity they produce. Instead, they must “donate” the extra to the grid free of charge. Systems over 100 kW must register if they wish to sell the extra electricity. Community ownership of PV systems, of all sizes, under this legislation is prohibited. Not only this, but the legislation is retroactive; meaning installations prior to the introduction of the tax must comply. If the conditions are not met, then the PV system owners are subject to a penalty fee of up to €60 million ($64 million). To put this in perspective, this is twice the penalty of a radioactive leak from a nuclear plant. Unsurprisingly, this caused outrage.

Exceptions to the tax

There are some circumstances where the tax does not apply. Fear not off-gridders, this tax is only for those connected to the grid. If you run an off-grid system then no grid tax needs to be paid at all. Installations smaller than 10 kW are also exempt from paying the second sun tax. The Canary Islands and the cities of Ceuta and Melilla (Spanish territories in Africa) are also exempt from the second tax. Mallorca and Menorca pay the second sun tax at a reduced rate.

The Spanish government defended the legislation by saying the fees contribute to overall grid system costs. However, the Spanish Photovoltaic Union (UNEF) pointed out how uneconomic the new law was. Their spokesperson stated, “Each kWh imported from the grid by a self-consumer will pay double the tolls compared to a kWh imported from the gird by another consumer.”

Change on the horizon

The current legislation is an unnecessary burden placed upon solar consumers who want to be more economical and environmentally friendly. This has been recognized by opposing political parties and other unions and consumers. The political party which initially brought in the sun tax is now a minority. Therefore, there is now the opportunity for all opposing parties to remove this expensive and impractical legislation.

In January 2017 a law proposal was registered in congress, beginning the process of the sun tax removal. The urgent changes …

March 29, 2017 4 Comments

Microgrid, revolution, off-grid, electricity, trading, blockchain, technology, solar, renewables

Energy

A Microgrid Revolution – Blockchains spreading everywhere

https://www.off-grid…

March 28, 2017 No Comments

Community

Calor Gas offers up to £5,000

Bottled Gas supplier Calor Gas is offering funding of up to £5,000 for schemes that will improve life in off-grid communities.

Calor Gas spokesman Paul Blacklock said: “We provide energy to homes and businesses and understand the challenges country living can pose, especially when it comes to community facilities. Projects we support could be anything from community centres, village halls and sporting venues to youth clubs and Scout groups, or they could be initiatives to support the elderly.

“Entries open on April 3. We will be encouraging the whole community to get on board by voting for their favourite.”

Calor Gas Limited (Calor), a subsidiary of SHV Holdings N.V. is an energy service company that provides liquefied petroleum gas supply and other energy services. The company offers products and services such as home energy supply, boiler and heating services, gas bottles, Calor liquefied petroleum gas autogas, and renewable energy for residential customers. It offers LPG solutions for FLT, fork lift truck training, heating solutions, radiant heating, warm air heating, wet system heating, water heating, farming wit LPG, and servicing and maintenance, among others to business customers. The company also sells gas cylinders, outdoor living, commercial appliances, in the home, and solid fuel pallets. Calor is headquartered in Warwick, the UK.

Calor Gas Limited Competitors include

Alpha Petroleum Resources Limited

FCL Petroleum Limited

Gasrec Ltd

Linton Fuel Oils

Sonatrach Petroleum Corporation

BOC Group Limited

…

March 25, 2017 No Comments

Energy

Love those Tesla-lovers

Jason Hughes is a happy hacker – but not of computers – he is known for leaking Tesla’s plans ahead of the company’s actual announcements, and now he has revealed photos of his own Tesla battery-powered compound in North Carolina. The 4,500 square-foot home has 102 commercial-grade solar panels to capture energy from the sun which then gets stored into a home battery storage unit composed of battery modules ripped from two Tesla Model S 85 kWh packs.

The 44.4 kW home solar system produces enough energy to not only power the entire home and all of its electrical appliances, but also provides enough energy to charge a pair of his and hers Model S each day. The end result is an elaborate home-engineered system that took roughly a year to design and build, and has allowed Hughes and his family to remain 99% self-sufficient for the past two years.

The battery banks used for storing solar energy are derived from*battery packs found from a salvaged Model S. Hughes dismantled the packs to create a stacked array of battery modules. A total of 36 modules are used in the home set up which equates to 2.25x Model S 85 kWh battery packs.

Here’s a video of Hughes performing a teardown of one of the Model S battery packs.

hughes-solar-home-electrical-roomhughes-solar-home-tesla-battery-module-2hughes-solar-home-tesla-battery

COSTS OF SOLAR POWER

Hughes says a large portion of the overall expenditure went to the $40k cost in Tesla batteries. He admits that the project likely doesn’t make sense from a financial perspective, but it’s important to understand that the value of his project goes beyond what a cost benefit analysis may yield.

Beyond being able to show that living solely off of sustainable energy is possible, the main inspiration behind his yearlong project was his father who taught him at a young age of 9 how to build a small off-grid solar system that produced enough energy to power his bedroom light, a small TV and a PC. That became the catalyst to what would become a lifelong dream to design an off-grid system capable of powering an entire house, along with electric vehicles.

HOME SOLAR SYSTEM WITH TESLA BATTERY

36 modules from 2.25x Tesla 85kWh packs
191.25 kWh (DC side)
~4,200 Ah
43.2V nominal @ 3.6V per cell
15,984 cells (!)
Inverters: 8x Outback Radian GS8048A
240VAC @ 60Hz w/neutral
64kW continuous AC output
30 minute surge: 72kW; 5 second surge: 96kW; 100ms surge: 135.76kW
Grid-Battery Charging Capacity: 57kW
Expected AC output from pack after safe SoC window and efficiency considerations: ~160 kWh usable AC power
PV: 102 Sunpower Commercial Panels @ 435W (20% efficiency) for 44,370 Watts DC
Split into 17 sets of 6 panels (3 parallel of 2 in series)
17 individual MPPT charge controllers (Midnite Solar Classic 200)…

March 22, 2017 No Comments

EcoSolarCool, Refrigerator, Solar, Off-grid,

Food

EcoSolarCool new Solar Refrigeration

EcoSolarCool have kick-started 2017 with the release of two new Solar Refrigeration models. The new additions to the upright product line aim to minimise the daily power consumption of cooling appliances. Refrigerators are one of the most energy consuming appliances in the home, accounting for up to 25% of household energy cost. EcoSolarCool want to change this, “providing constant, reliable and energy efficient cooling at great value.”

Two New Models

Both of EcoSolarCool’s new models are approved by UL250 and CSA to US and Canadian standards. These are the only solar refrigerators in the world to hold this approval. Plus this is for the whole unit and not just the compressor. Both models have the most up to date and advanced Danfoss DC compressor and are manufactured in Europe. The power consumption for the models is also at a record low for the solar/DC appliances industry at 201 kWh per annum! This is also amongst the lowest in the AC refrigeration appliances market.

The ESCR260GE Metallic Grey model has a total capacity of 260 litres (9.2 cubic feet). The refrigeration compartment is larger in comparison to the freezer compartment at 235 litres (8.3 cubic feet) to 25 litres (0.9 cubic feet). The freezer is located at the top of the unit and the refrigeration compartment at the bottom. This model weighs in at 121.3 lb (55kg) and is 23.7 x 25.2 x 57.1 inches.

The ESCR355GE Stainless Steel model has a total capacity of 354 litres (12.5 cubic feet). The larger refrigeration compartment (258 litres/9.1 cubic feet) is located at the top of the unit, and the freezer compartment (96 litres/3.4 cubic feet) at the bottom. This model weighs in at 163.2 lb (74kg) and is 23.7 x 25.2 x 78.8 inches in size.

Features of Both

Both models have adjustable internal temperatures and reversible doors. The temperature range for the cooling compartment is between 0°C/32°F to 10°C/50°F. Whereas, the freezing compartment temperature can reach as low as -18°C/-0.4°F. For operation, both models need a solar panel, a 12 volt AGM, lithium or deep cycle battery and a 15 amp 12/24 volt solar charge controller. The battery ensures the refrigerator will continue running through the night and on not so sunny days. Whereas, the solar charge controller regulates the electric charge from the batteries and the solar panel(s). To find out how many solar panels/batteries needed to run your solar refrigeration appliance, check out EcoSolarCool’s blog post.

The refrigerators are perfect for a wide variety of situations from RVs, to cabins to on and off-grid homes.

Both refrigerator models can be bought from a local dealer or the Solar Power estore. Prices advertised on the EcoSolarCool website are $1,299.00 for the smaller Metallic Grey model and $1,650.00 for the larger Stainless Steel model.

EcoSolarCool Products all have these…

All the solar powered refrigeration and freezer appliances sold …

March 22, 2017 2 Comments

All you need to go off-grid

Energy

Cooking with the sun

La Crisis de Energía en Sudáfrica

Battery costs plummet

Black Hills Energy Cuts Renewables Payout

South Africa Power Crisis

Govt warned must transform UK national grid

Solar sheds for sale