Sea Energy Harvesting – off-shore

Of course, onshore resources are first.

Of course, it will take a long time before it’s real business, but we can start with the vision…

Where is the most “energy intense” location on earth in terms of wind, solar and other renewable sources? Is it onshore or off-shore?

Let’s see what sea energy harvesting is about…

Derived from Image by

Concept derived from Image by

There was in 2011 an interesting research I recommend here, that overlapped the irradiation and the temperature, in order to determine where solar can yield more, given the PV panels are less efficient the higher the temperature. The resulting optimal areas for generation where the Himalayas (not too accessible), the Antarctica (similar to off-shore) and regions in the southern Andes.

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Electric boats and sea energy harvesting

As commented in a recent post on renewable islands, to completely decarbonize islands, it is necessary to use renewables for electricity and heating, together with the electrification of transport. (Actually, electric mobility serves as renewable storage)

By transport I mean electric mobility on land, that is vehicles, rail, buses, but also on the sea. How can we decarbonize sea transport?

No, I’m not proposing getting our hands on the oars or going back to:

Por MKFI (Trabajo propio) [Public domain], undefined

Let’s see how…

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Partial/progressive off-grid, a proposal

I already commented on the self-consumtion regulation in draft in Spain, (basically a retroactive measure to stop any development). The reason behind is the excess of fixed system costs; with decreasing energy consumption, power and energy prices increase in a feedback loop. Blocking self-consumption is an attemp to avoid further grid energy consumption decrease.

Off-grid balance

As in other countries with similar fixed costs, decreasing demand pushes towards higher energy prices, and taxing self-consumption is seen as a regulatory solution. Apparently off-grid is becoming already a cheaper option. As it is not the best solution for the system as a whole, an intermediate solution could be the following: Sigue leyendo

Google energy storage

I’m surprised Google Energy has still not got it…

How did they create the most competitive data centres in the world to grow so fast? How could they build the most competitive energy storage centres in the world?*

If you know the answer to the first one, you probably know what I mean in the case of energy storage.

By Steve Jurvetson ( [CC-BY-2.0 (], via Wikimedia Commons

Google Production server. By Steve Jurvetson ( [CC-BY-2.0 (, via Wikimedia Commons

The key was and is to use inexpensive harware. With servers, rapid obsolescence meant they wouldn’t need to repair the PCs used for their servers, many of the servers wouldn’t ever work, and the design had to be optimized to work around these failures. Of course now they are interested in the most energy efficient server systems, as that is the main cost for operating data centres, but the cheap and fast concept remains.

In the case of battery storage, Sigue leyendo

Do we need batteries without wheels?

Let’s start this post by quoting another post on a recent market estimation by IMS research, estimating the battery energy storage is to skyrocket up 200 M$ today to 19 bn$ in 2017.

While this may look promising, and seem the perfect way to increase renewable penetration, paving the way to a decarbonized energy sector, please stop. …and reconsider if it is the best solution.

Why decarbonize the power sector alone… if we can decarbonize the transportation and the power sector at the same time?

Battery wheels

How? Investment in electric vehicles (EVs) must be economically efficient in itself (cheaper than the CO2 emmitting vehicles) so every € invested has already a return via mobility (for the owner/user). This means using the available storage is relatively “free” to the power sector. In my opinion, subsidizing  battery storage (gathering dust inside a building) is a stupid idea compared to incentivizing the “transport-sector-decarbonizing-storage” or, to say it other way, batteries-with-wheels. EVs should be incentivized not only by governments trying to reduce the energy sector trade unbalances and reducing CO2 emissions, but also by utilities willing to increase the customer’s bill (an EV customer is billed aprox. a 30% more)

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