From the Blog

Bepos: quand les bâtiments positivent!

par  STEFAN LOUILLAT, Le Monde.fr, 5 juin 2014

Les Bepos kesako ? Cet acronyme désigne les bâtiments à énergie positive. Seuls 30 Bepos sont construits chaque année en France. Quels avantages présentent ces bâtiments? À quels critères doivent-ils répondre ? Comment peuvent-ils se généraliser ? Quelles sont leurs limites? Éléments de réponse avec Stéfan Louillat de l’Ademe (Agence de l’environnement et de la maîtrise de l’énergie).

Des bâtiments qui produisent plus d’énergie qu’ils n’en consomment. Voilà le challenge que devra relever tous les bâtiments construits après 2020. Selon la règlementation européenne, les bâtiments à Energie Positive (les Bepos) devront donc afficher une “énergie nette presque nulle”. Si les détails de ce bilan positif sont encore à définir, les grands principes sont, eux, connus. Le bilan s’entend en moyennes annuelles et la production doit être supérieure aux consommations dues au chauffage, à la climatisation, à la production d’eau chaude sanitaire et à l’éclairage.

Plusieurs dizaines de réalisations ont été accompagnées en Ile-de-France par l’Ademe depuis cinq ans notamment par l’intermédiaire d’appels à projets pour des bâtiments démonstrateurs. Parmi eux, l’école de Saint Exupéry à Pantin. Composée de trois volumes compacts, l’école est dotée de plus de 1000 m2 de capteurs photovoltaïques. Cet équipement, couplé à des matériaux bien précis, lui permet de produire plus d’électricité qu’elle n’en consomme en chauffage, éclairage et ventilation. Les salles de classe, bureaux et espaces de loisirs sont également équipés de sondes photoélectriques afin d’optimiser la gestion de l’éclairage.

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Toronto’s leadership for green roofs

by KAID BENFIED, Switchboard, Natural Resources Defense Council staff blog, April 25, 2012

City Hall Podium Source: www1.toronto.ca

City Hall Podium
Source: www1.toronto.ca

In January of 2010, Toronto became the first city in North America to require the installation of green roofs on new commercial, institutional, and multifamily residential developments across the city. Next week, the requirement will expand to apply to new industrial development as well.

Simply put, a “green roof” is a rooftop that is vegetated. Green roofs produce multiple environmental benefits by reducing the urban heat island effect and associated energy demand, absorbing rainwater before it becomes runoff, improving air quality, and bringing nature and natural diversity into urban environments. In many cases, green roofs can also be enjoyed by the public much as a park can be.

Toronto’s requirements are embodied in a municipal bylaw that includes standards for when a green roof is required and what elements are required in the design. Generally speaking, smaller residential and commercial buildings (such as apartment buildings less than six stories tall) are exempt; from there, the larger the building, the larger the vegetated portion of the roof must be. For the largest buildings, 60 percent of available space on the roof must be vegetated.

For industrial buildings, the requirements are not as demanding. The bylaw will require that 10 percent of available roof space on new industrial buildings be covered, unless the building uses “cool roofing materials” for 100 percent of available roof space and has stormwater retention measures sufficient to capture 50 percent of annual rainfall (or the first five mm from each rainfall) on site. For all buildings, variances to compliance (for example, covering a lesser roof area with vegetation) may be requested if accompanied by fees (keyed to building size) that are invested in incentives for green roof development among existing building owners. Variances must be granted by the City Council.

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Arizona rooftop solar customers could face new tax

by  AMANDA H. MILLER, CleanEnergyAuthority, May 6, 2014

Solar in Arizona Photo: Arizona Republic Source: www.cleanenergyauthority.com

Solar in Arizona
Photo: Arizona Republic
Source: www.cleanenergyauthority.com

Homeowners who are leasing rooftop solar arrays in Arizona could be hit with an average $152 a year property tax bill they weren’t counting on when they decide to go solar.

The state department of revenue recently reinterpreted a tax policy that exempts rooftop solar equipment from property tax, determining that the exemption only applies to those who own their solar arrays, not people who lease solar panels.

The state Department of Revenue said the leased panels are merchant power plants and the leasing companies should pay tax on them.

Those taxes would flow through to customers.

Solar leasing accounts for the majority of the distributed solar generation in Arizona and is widely adopted by middle class residents who can’t afford to buy complete systems outright.

Most who lease rooftop solar systems save $60 to $120 a year over buying all of their power from Arizona Public Service. The new property tax would erase the cost benefit of going solar, solar advocates say.

“Arizona is breaking new ground for being an extremely strange political environment,” said Bryan Miller, vice president of public policy for solar leasing company Sunrun and president of The Alliance for Solar Choice.

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Analysis: Clouds over Hawaii’s rooftop solar growth hint at U.S. battle

by NICHOLA GROOM, Reuters, via Chicago Tribune, December 16, 2013

A view of houses with solar panels in the Mililani neighbourhood on the island of Oahu in Mililani, Hawaii  Photo: Hugh Gentry, Reuters Source: www.chicagotribune.com

A view of houses with solar panels in the Mililani neighbourhood on the island of Oahu in Mililani, Hawaii
Photo: Hugh Gentry, Reuters
Source: www.chicagotribune.com

(Reuters) – When Gloria Adams signed a contract to install a rooftop solar power system on her Oahu home in late August, she looked forward to lower electric bills and a return on her investment in the years ahead.

She never dreamed that she would have to stop the project, get the Hawaiian Electric Company’s permission before she could proceed, and possibly help pay for any upgrades to her neighborhood’s electricity circuits to handle the extra load.

Her home improvement ran afoul of a rule that went into effect in September.

The regulation requires homeowners on Oahu – Hawaii’s most populous island – to get the utility’s approval before installing photovoltaic (PV) rooftop solar systems.

In areas like Mililani, where Adams lives, the utility’s power circuits have reached a threshold where it would be dangerous to add PV systems without investing in upgrades to the distribution system.

“We didn’t anticipate having to pay HECO when we took this on,” Adams said. “They are acting like they got caught with their pants down, saying, ‘We don’t know how to deal with this.’”

What’s happening in Hawaii is a sign of battles to come in the rest of the United States, solar industry and electric utility executives said. The conflict is the latest variation on what was a controversial issue this year in top solar markets California and Arizona. It was a hot topic at a solar industry conference last week: how to foster the growth of rooftop solar power while easing the concerns of regulated utilities that see its rise as a threat.

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Renewable energy support schemes now present in 127 countries, report finds

by IAN CLOVER, PV Magazine, 28 August, 2013

The Worldwatch Institute — an independent research organization based in Washington D.C. — reports that 127 countries worldwide have now enacted support schemes for renewable energy.

A trends report by the Worldwatch Institute has found that 127 countries worldwide now have renewable energy support schemes in place – up from just 48 as recently as mid-2005.

The report’s author, Evan Musolino, drew the analysis for his “Vital Signs Online” trend from data gleaned from “REN21’s Renewables 2013 Global Status Report”, which he co-authored.

In this latest work, Musolino also reports that 99 feed-in tariff (FIT) policies are currently in place worldwide at either national or state/provincial level, while quotas requiring a specified minimum share of renewable energy power production are evident in 76 countries; up from just 34 in 2004.

Despite the economic downturn leaving a number of countries mired in recession and hamstrung by shrinking budgets, investment in renewable energy development and expansion has generally followed an upward trend, particularly in the solar photovoltaics industry, which has seen module costs fall by as much as 80% since 2008, and 20% since 2012.

At the beginning of this year, 66 countries offered tax incentives on renewable energy development, the report finds. And as the technology has proliferated, so has regional diversity.

In the middle of the decade, 58% of countries that enacted renewable energy support schemes were located in Europe and Central Asia. Today, that figure is slightly more than a third of the global total, with East Asia and the Pacific (21%), and Latin America and the Caribbean (LAC) following closely.

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Arizona’s new fee puts a dent in rooftop solar economics

by MATTHEW PHILIPS for Businessweek, Mashable, November 24, 2013

Source: www.mashable.com

Historical and forecasted cumulative PV installations in Arizona versus the state’s distributed generation carve-outm, 2010-2025 (MW)
Image source: www.mashable.com

Last week, Arizona regulators gave the state’s largest utility, Arizona Public Service, the authority to charge homeowners with solar panels on their roofs a fee for plugging into the grid and in some cases, selling electricity back onto it. Beginning next year, homeowners who install rooftop solar systems will have to pay a monthly levy — the first ever in the U.S. — equal to $0.70 per kilowatt of installed capacity.

That’s well below the $8 per kw that APS had initially sought. Depending on how big their home system is, the fee will end up costing consumers anywhere from $3 to $6 a month, according to a report by Bloomberg New Energy Finance. APS had hoped to be able to charge about $50 a month per home. The 18,000 rooftop solar systems already present in APS’s service territory will be grandfathered; only those installed after Dec. 31 will be subject to the levy.

“This is a body blow for the Arizona solar industry, not a knockout punch,” says Stefan Linder, an analyst with Bloomberg New Energy Finance. “While this fixed fee will cut into the economics of residential solar, for many homeowners it will still make financial sense to go solar.”

The Solar Energy Industries Association claims that a typical rooftop solar system saves a homeowner about $5 to $10 per month; other estimates put it closer to $20.

The decision by the Arizona Corporation Commission is the first stab at resolving a contentious fight that’s been brewing for years between the solar industry and public utilities. Arizona, the second-largest solar market in the U.S., behind California, has been viewed as a critical battleground in deciding whether utilities would be able to squeeze money out of homeowners who no longer buy electricity from them — and in many cases, actually get paid for pushing supplemental power generated by their solar panels back onto the grid.

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