21 Sep '12, 4pm

Blow-by-Blow PV System Efficiency: A Case Study for Storage

Blow-by-Blow PV System Efficiency: A Case Study for Storage

The blue curve is the load. All the spikes are from the refrigerator, and the attic fan makes the big bulge mid-day. The attic fan begins demanding juice right about the time the battery is full and begins to refuse more food. This makes for a beautiful pairing: the attic fan only activates on sunny summer days, when the solar resource is abundant, and the batteries are mostly recharged by noon. The baseline is comprised of the constant load of modem/wireless, a 20 W TiVo (since eliminated), standby power of various devices, the inverter baseline power, and the power provided to PV system components (monitoring, communications, etc.). I can tell from the plot that no television activity took place that particular evening. Actually, we were in Seattle, so the house was pretty quiet.

Full article: http://www.theoildrum.com/node/9499

Tweets

The Natural Gas Revolution: Good or Bad for Ene...

renewableenergyworld.com 21 Sep '12, 1pm

If there were an equivalent in the energy industry to Time Magazine’s Person of the Year, natural gas would be this year’s...

The Reign of Residential PV in Japan

The Reign of Residential PV in Japan

greentechmedia.com 19 Sep '12, 12pm

It is worth noting that black backsheets and triangular panels are often used as differentiators. The sales and distributi...

Case Study: Simple Solutions: Passive solar des...

ecohomemagazine.com 19 Sep '12, 5pm

Frank Pasker is nothing if not adaptable. Transplanted from Germany to Southern California more than a decade ago, he imme...

Is the natural gas revolution good or bad for energy efficiency?

Is the natural gas revolution good or bad for e...

greenbiz.com 21 Sep '12, 3pm

If there were an equivalent in the energy industry to Time Magazine’s Person of the Year, natural gas would be this year’s...

Amid Solar Turmoil, Concentrating PV Maker Readies Plant

Amid Solar Turmoil, Concentrating PV Maker Read...

greentechmedia.com 18 Sep '12, 10pm

Semprius, a company that incubated with the National Renewable Energy Laboratory, is nearly ready to step out into the rea...

Excellent #Innovative approach to #solar: Hybri...

solarfeeds.com 20 Sep '12, 6pm

Solarsphere, one of the semifinalists at this year`s Cleantech Open , claims their new hybrid photovoltaic/concentrated so...

Together with Waterwise we're urging businesses to use water efficiency to boost profits: #greener

Together with Waterwise we're urging businesses...

environment-agency.gov.uk 18 Sep '12, 10am

Businesses urged to use water efficiency as a way to boost profits 17-Sep-2012 UK Water Efficiency Awards 2012 announced T...

Stem’s Cloud-Based Take on Energy Storage: More...

greentechmedia.com 17 Sep '12, 7pm

Stem is a "cloud-based energy optimization solution that reduces peak electrical usage, lowers electrical bills, and elimi...

How green banks can transform our energy system

How green banks can transform our energy system

greenbiz.com 20 Sep '12, 3pm

Green Banks make public dollars invested go farther and give the public a return on its investment . Because of the underl...

Orchestra Adds Storage Add-on

Orchestra Adds Storage Add-on

engineyard.com 19 Sep '12, 5pm

We are delighted to announce the immediate availability of shared storage for basic and elastic applications deployed on O...

Italy court upholds American convictions in CIA abduction case

Italy court upholds American convictions in CIA...

stripes.com 20 Sep '12, 5am

ROME -- Italy's highest criminal court on Wednesday upheld the convictions of 23 Americans in the abduction of an Egyptian...

Siemens in Amsterdam to present intelligent solutions for smart grids, smart buildings, and energy storage syste...

Siemens in Amsterdam to present intelligent sol...

siemens.com 20 Sep '12, 8am

Siemens supplies building automation and security technology for smart buildings, offering an additional opportunity for d...

Solarsphere – Hybrid PV/CSP Capturing 72% of th...

solarfeeds.com 15 Sep '12, 4pm

Solarsphere, one of the semifinalists at this year`s Cleantech Open , claims their new hybrid photovoltaic/concentrated so...

HPB Case Study: Overview - REI Denver Flagship

buildinggreen.com 17 Sep '12, 3pm

With 1.7 million active members, REI is the nation's largest consumer cooperative. REI's Denver Flagship, used as a retail...

Alternative Energy: Technology: PV Still Facing...

altenergystocks.com 14 Sep '12, 1pm

To encourage the continuation of necessary incentives as well as utility participation, the PV industry has promised a con...