Tag Archives: tesla

Blowout Week 162

We kick off with the exaggerated reporting of blackout risks in the UK and follow up with: Trump gets busy rolling back US oil & gas regulations; world oil and coal demand to peak by 2020; new UK guidelines on North Sea oil, the high cost of “new generation” nuclear plants; Toshiba to pull out of Moorside, Dong & Deutsche Bank to pull out of coal; Japan to build 45 new coal plants; China launches green certificates, Brexit’s impact on Irish gas prices, UK asked to cut biomass subsidies, Npower’s “shocking” price hikes, European solar demand falls; energy storage in California, Australia and Somerset; the world’s largest offshore wind turbine; a wind turbine that flaps like a hummingbird; Google’s 100% renewable energy claim a “gimmick” and a slight increase in global lower troposphere temperatures in January. Continue reading

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Solar power on the island of Ta’u, a preliminary appraisal

A 1,400kW(p) solar PV array backed up by 6,000kWh of battery storage and a smart grid has been installed on the island of Ta’u in American Samoa. It’s widely reported that this system already allows Ta’u to obtain 100% of its electricity from renewable sources for 100% of the time, and this brief review suggests that it will in fact be capable of delivering 100% electricity for almost 100% of the time if and when it reaches full operation. Continue reading

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Blowout Week 143

In this week’s blowout we revisit the issue of £billion dumb meters, weak oil prices, Libya ramping oil production a lot, Donald Trump wooing the oil industry, Australia’s stranded coal reserves, wind frenzy in China, US wave power takes off, blackouts in Puerto Rico, the Nordlink inter-connector, Holland to close coal fired power generation, Tesla to power Europe. Continue reading

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Blowout Week 139

Elsewhere in this week’s Blowout: Iran / OPEC deal on the cards; China accused of nuclear espionage; UK government looks for ways to torpedo Hinkley Point; Fessenheim nuclear power plant in France to close; coking coal price on the rise; £200 million pumped storage hydro scheme on Lewis; National grid clutching at straw batteries; Telegraph living in the real world; Tesla cramming in more electrons; Human caused climate change started in 1830; Air Africa to run on Woodbines; France opts for tree wind power over nuclear power. Continue reading

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Blowout Week 117

UK coal plant shutdowns, energy price volatility, the bloated US natural gas supply, the OPEC Doha meeting, Brexit backers and Gazprom calumniate Amber Rudd, IS terrorists threaten Belgian nuclear plants, Peabody Coal claims reports of its death are exaggerated, Tesla’s Powerwall battery wins award, EU renewables investment on the skids, Switzerland’s utilities now feeling the pain of low wholesale prices….. Continue reading

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Blowout week 93

The spotlight in this week’s Bumper Blowout falls on coal. Vattenfall wants to sell its German lignite plants and lignite mines and Greenpeace wants to buy them – no prizes for guessing why. Continue reading

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Blowout Week 84

Stories below the fold include: Saudia Arabia borrowing money, BP to invest in N. Sea oil, nuclear risks are all in the mind, renewables self-destructing, Jeremy Corbyn on rooftop solar and nationalization, Germany’s neighbors blocking imports of unwanted German wind & solar…. Continue reading

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A Potential Solution to the Problem of Storing Solar Energy – Don’t Store It.

In How Much Battery Storage Does a Solar PV System Need? I assumed that the rooftop PV system would generate just enough power to fill annual domestic demand and that the surplus power generated in summer would be stored for re-use in the winter in Tesla batteries. The result was an across-the board generation cost of around $35/kWh. Clearly the Tesla battery storage option isn’t economically viable, or at least not under the scenario I chose.

As Phil Chapman and others pointed out in comments, however, this is not the only way a domestic solar PV system can generate enough year-round power to allow a household to go off-grid. Another is to overdesign the system so that it’s large enough to fill demand in winter when solar output is at a minimum and simply curtail the excess power generated in summer. How does this “no storage” option pan out? Continue reading

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How Much Battery Storage Does a Solar PV System Need?

Blowout Week 70 featured Tesla’s new 7 kWh and 10 kWh lithium-ion battery storage units. Will they allow households with rooftop solar PV systems to store enough surplus solar power to fill domestic demand throughout the year without the need to import grid power when the sun isn’t shining? It all depends on how much storage is needed and how much it costs, and in this post I present ball-park estimates of storage requirements and costs for domestic rooftop solar installations calculated using the following simplifying assumptions: Continue reading

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Blowout Week 70

This week we feature Tesla and its new energy storage battery. Is it a game changer, or just another battery?

More below the fold, including a predicted oil price rebound, OPEC’s civil war in Yemen, Luxembourg and Austria to file suit against Hinkley, the EOn/Uniper spinoff, German miners march, the Church of England puts coal in the sin bin, a solar powered aircraft that flies when the wind isn’t blowing, Richard Muller on the need for temperature adjustments and how climate change triggered the Nepal earthquake. Continue reading

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