Archives from Months December, 2013

Q at Night – Reactive power outside of feed-in operation

Sunny Central CP XT

The electrical grid has a fundamental need for reactive power and, in some cases, the requirement to avoid instabilities via reactive power feed-in. SMA Sunny Central CP XT inverters satisfy this requirement and make reactive power available even outside of normal feed-in periods. 

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5.00 avg. rating (96% score) - 1 vote

Historic Vermont Barn Gains 18kW Solar Array with Secure Power Supply

Alex Wilson - PV on barn roof

When BuildingGreen Inc. founder Alex Wilson started to re-build his home and barn in West Dummerston, Vt., he knew that he wanted it to be “net-zero.” Net-zero means the property will produce 100 percent of the energy needed to run the house and barn. To make this happen, Wilson needed a solar-electric, or photovoltaic (PV), system that could generate as much energy as was consumed. 

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5.00 avg. rating (96% score) - 1 vote

The Five Hottest Solar Gadgets

It’s amazing what solar energy can move, illuminate and operate. It lengthens the day after the sun goes down, provides energy where is no utility grid and – just as important – froths milk. Here is a random selection of five solar-powered devices we came across while surfing the Internet.

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5.00 avg. rating (98% score) - 4 votes