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Much confusion exists in the minds of lay people regarding having wall-mounted batteries or not. The below article shows the homeowner cost is at least 32 c/kWh to own the Tesla Powerwall 2.0 battery for 10 years. After the 10 years have elapsed, the unit is returned to Tesla for reprocessing, because it has outlived its useful service life.
Some homeowners with roof-mounted solar systems think such batteries can be used to shift their excess midday solar…Continue
Posted on June 16, 2018 at 5:00am — 2 Comments
The ISO-NE reports, prepared by energy systems analysts with decades of experience, describes in great detail the operation of the grid during the cold weather period, with insufficient gas and fuel oil supply, and minimal solar most of the time, and near-zero wind on 5 days, and France taking advantage of the US by charge outrageously high prices for liquid natural gas (LNG), plus an outage of a major transmission line. It was a miracle rolling blackouts were avoided. Millions of…Continue
Posted on June 8, 2018 at 11:00am — 1 Comment
Germany, a major industrial country, is a leader in renewable energy generation. However, Germany made a significant mistake. Germany decided to phase out its nuclear plants, which produce low-cost electricity that has near-zero CO2/kWh, instead of replacing the plants. Germany continued to the use of lignite, a soft coal (low-Btu/lb.) coal, and hard coal. As a result, the CO2eq emissions have not decreased for the past 8…Continue
Posted on June 6, 2018 at 12:15pm — 1 Comment
Proponents, including installers of solar systems, present many numbers, usually in not too clear a format, to show how profitable it is to have solar on your roof.
This article presents a spreadsheet analysis of two plans:
- Plan A, the Standard Plan, which is to invest in a rooftop solar system.
- Plan B, the Warren Buffett Plan, which is to invest in shares of AT&T that pay a…Continue
Posted on May 30, 2018 at 11:30am — 2 Comments