Living Energy Farm, or "LEF", is a zero fossil fuel intentional community of seven adult members plus two children (as of 2022) [1] on 127 acres in rural Louisa County, Virginia, United States. [2] The farm is an Ally Community with the Federation of Egalitarian Communities. [3] It is nine miles from Twin Oaks Community, which helped support LEF when it was being founded.
LEF is an intentional community, organic farm and environmental educational center founded in 2010. [4] The community is off the grid and grows most of its food. The membership is income sharing, and supports itself financially by growing seeds and processing sweet potato slips for Southern Exposure Seed Exchange. [2]
As an environmental education center, LEF's mission is to demonstrate a way of life that is both sustainable and accessible to the majority of humanity that is not wealthy. To that end, LEF has developed a solar powered DC Microgrid that supplies basic domestic energy needs at a fraction of the cost of typical AC based off-grid solar systems.
In 2020 LEF launched a business, Living Energy Lights, which sells daylight drive appliances and battery systems.
In addition to its pioneering work on DC energy systems, LEF employs many other "green" technologies such as strawbale insulation, passive and active solar heating, composting toilets, biogas production for cooking fuel. [2]
The DC Microgrid developed at LEF uses daylight drive (wiring DC motors and other appliances directly to PV panels), thermal storage, and insulation to provide off-grid domestic energy services at low cost by avoiding the use of batteries and inverters for heavy energy loads such as refrigeration, cooking, heating and cooling, and motors. Power for lights and smaller loads like electronics are provided by 12V DC nickel iron battery systems. [5]
The community has been central to the development and testing of Insulated Solar Electric Cookers in cooperation with Cal Poly University.
LEF works to promote and establish daylight drive DC Microgrids in low income communities where grid power is inaccessible or unreliable. In 2019 and 2020, crews from LEF installed 12V battery kits for 50 homes in the Dine and Hopi Reservations. [6] Since 2021, they have been working with The Source Farm and Ecovillage in Jamaica to establish a daylight drive food processing facility. They are also working with organizations in Puerto Rico to establish a DC Microgrid demonstration center around Mayaguez.
Energy storage is the capture of energy produced at one time for use at a later time to reduce imbalances between energy demand and energy production. A device that stores energy is generally called an accumulator or battery. Energy comes in multiple forms including radiation, chemical, gravitational potential, electrical potential, electricity, elevated temperature, latent heat and kinetic. Energy storage involves converting energy from forms that are difficult to store to more conveniently or economically storable forms.
Distributed generation, also distributed energy, on-site generation (OSG), or district/decentralized energy, is electrical generation and storage performed by a variety of small, grid-connected or distribution system-connected devices referred to as distributed energy resources (DER).
Energy demand management, also known as demand-side management (DSM) or demand-side response (DSR), is the modification of consumer demand for energy through various methods such as financial incentives and behavioral change through education.
Peaking power plants, also known as peaker plants, and occasionally just "peakers", are power plants that generally run only when there is a high demand, known as peak demand, for electricity. Because they supply power only occasionally, the power supplied commands a much higher price per kilowatt hour than base load power. Peak load power plants are dispatched in combination with base load power plants, which supply a dependable and consistent amount of electricity, to meet the minimum demand.
A microgrid is a local electrical grid with defined electrical boundaries, acting as a single and controllable entity. It is able to operate in grid-connected and in island mode. A 'Stand-alone microgrid' or 'isolated microgrid' only operates off-the-grid and cannot be connected to a wider electric power system.
Microgeneration is the small-scale production of heat or electric power from a "low carbon source," as an alternative or supplement to traditional centralized grid-connected power.
A Zero-Energy Building (ZEB), also known as a Net Zero-Energy (NZE) building, is a building with net zero energy consumption, meaning the total amount of energy used by the building on an annual basis is equal to the amount of renewable energy created on the site or in other definitions by renewable energy sources offsite, using technology such as heat pumps, high efficiency windows and insulation, and solar panels.
Solar air conditioning, or "solar-powered air conditioning", refers to any air conditioning (cooling) system that uses solar power.
UltraBattery is a trademark of the lead-acid battery technology commercialized by Furukawa Battery Co. Ltd. UltraBattery has thin carbon layers on spongy lead active material for negative plates. The original idea that combines ultracapacitor technology with lead–acid battery technology in a single cell with a common electrolyte came from the Commonwealth Scientific and Industrial Research Organisation (CSIRO).
Kommune Niederkaufungen is one of the largest intentional communities in Germany. Founded in 1986, it is an egalitarian, left-wing, income-sharing commune with consensus decision-making. It is situated in a complex of former farm buildings in the historic centre of the village of Niederkaufungen (Kaufungen), seven kilometres from the city of Kassel (Hessen). It has grown from 15 founder members to 62 adults and nearly 20 children and teenagers (2009). It is a member of "Kommuja", the German network of political communes and egalitarian communities.
An electrical grid is an interconnected network for electricity delivery from producers to consumers. Electrical grids consist of power stations, electrical substations to step voltage up or down, electric power transmission to carry power long distances, and lastly electric power distribution to individual customers, where voltage is stepped down again to the required service voltage(s). Electrical grids vary in size and can cover whole countries or continents. From small to large there are microgrids, wide area synchronous grids, and super grids.
A solar-powered refrigerator is a refrigerator which runs on energy directly provided by sun, and may include photovoltaic or solar thermal energy.
Husk Power Systems, founded in 2008, is a company based in Fort Collins, Colorado, US, that provides clean energy services to off-grid or weak grid rural communities in East Africa, West Africa and South Asia, primarily by building renewable energy mini-grids/micro-grids. Its original technology generated electricity using a biomass gasifier that created fuel from rice husks, a waste product of rice hullers that separate the husks as chaff from the rice, a staple food in both Asia and Africa. In the mid-2010s, with the rapid decline in the price of solar PV and batteries, Husk pivoted its business model to focus more on solar-plus-storage mini-grids, while continuing to use biomass in combination with solar to serve communities with larger electricity demand. In 2021, Husk Power was recognized in the REN21 Renewables Global Status Report as the first mini-grid company to achieve significant scale, by surpassing 100 solar hybrid community mini-grids, and 5,000 small business customers. In 2022, Husk signed an Energy Compact with the United Nations, in which it set a target of building 5,000 mini-grids and connecting at least 1 million customers by 2030.
Zero-carbon housing is a term used to describe a house that does not emit greenhouse gasses, specifically carbon dioxide (CO2), into the atmosphere. Homes release greenhouse gases through burning fossil fuels in order to provide heat, or even while cooking on a gas stove. A zero carbon house can be achieved by either building or renovating a home to be very energy efficient and for its energy consumption to be from non-emitting sources, for example electricity.
The following outline is provided as an overview of and topical guide to solar energy:
Passive survivability refers to a building's ability to maintain critical life-support conditions in the event of extended loss of power, heating fuel, or water. This idea proposes that designers should incorporate ways for a building to continue sheltering inhabitants for an extended period of time during and after a disaster situation, whether it be a storm that causes a power outage, a drought which limits water supply, or any other possible event.
Solar energy conversion describes technologies devoted to the transformation of solar energy to other (useful) forms of energy, including electricity, fuel, and heat. It covers light-harvesting technologies including traditional semiconductor photovoltaic devices (PVs), emerging photovoltaics, solar fuel generation via electrolysis, artificial photosynthesis, and related forms of photocatalysis directed at the generation of energy rich molecules.
Home energy upgrades from public utilities are added home energy efficiency and renewable energy features planned or installed by public utilities. Help from a public utility can make it easier for a homeowner to select, install or operate climate-friendly components. The utility might assist with coordinated use of utility-supplied energy, building features, financing, operating options and neighborhood supplied energy.
A mini-grid is an aggregation of loads and one or more energy sources operating as a single system providing electric power and possibly heat isolated from a main power grid. A modern mini-grid may include renewable and fossil fuel-based generation, energy storage, and load control. A mini grid can be fully isolated from the main grid or interconnected to it. If it is interconnected to the main grid, it must also be able to isolate (“island”) from the main grid and continue to serve its customers while operating in an island or autonomous mode. Mini-grids are used as a cost-effective solution for electrifying rural communities where a grid connection is challenging in terms of transmission and cost for the end user population density, with mini grids often used to electrify rural communities of a hundred or more households that are 10 km or more from the main grid.
The Energy Transitions Initiative Partnership Project (ETIPP) is a project under the United States Department of Energy to provide federal aid to remote communities in the United States for improving their electric infrastructure, energy costs, and resiliency during natural disasters and outages.
37°55′59.05″N77°59′38.91″W / 37.9330694°N 77.9941417°W
Municipalities and communities of Goochland County, Virginia, United States | ||
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| Footnotes | ‡This populated place also has portions in an adjacent county or counties | |