Author Archives: miniwindsystems

Significantly Lower Prices in Solar PV Modules

Solar PV module prices have fallen considerably over the past year. The same is true for peripherals or “accessories” like PV inverters, switches, or mounting hardware.

This development may be linked to the equally considerable lowering of incentives for solar installations in major markets such as the U. K. and Germany.

While these subsidy cuts very clearly — and disappointingly — point to the fact that apparent booms in installation numbers have been little more than government-controlled spending plans (rather than reasonable households coming to the conclusion that it’s a good idea living more environmentally-friendly), the lowered prices in and by themselves offer numerous opportunities for households wanting to jump on the Renewables bandwagon now.

A full installation for single or multiple family homes as well as for small businesses can be had for relatively low cost now that over-inflated prices have de-flated (as they do with all “bubbles” once they are over with)…

Add to this the availability of more and more cheap Asian products, and you have found yourself a nice buying opportunity — along with the good feeling of Being Green without being bribed to do so by a government agency.


Solar-Friendly Farm for Sale

With over 200 sq m of soth-southwesterly roof space, there is an enormous opportunity in Sweden’s Värmland province for smart investors and solar-friendly real estate buyers coming to market.

Solar-friendly smallholding on the shores of Lake Vaner, Värmalnd province, Sweden: English is spoken, feel free to enquire for details!  --  Resthof, nur 2 km zum riesigen Vänersee: Ferienhaus für bis zu 8 Personen

The Mellgarden small farm is a classical Scandinavian smallholding and is situated right in the Lake Vaner area (the largest body of freshwater in Western Europe). On top of the cast roof space that can either be used for own generation purposes or potentially leased-out to third-party Renewables operators (including any eco-friendly neighbours), the property boasts a beautiful and solid timber villa (built 1904) plus two farm buildings and an extra garage on a total area of 3430 sq m (or just under 1 acre/approx 1.5 acres U. S.). Details and a complete listing are available here.

Home Power Optimization: the REbus™Microgrid

Home Power: Meet the REbus™ microgrid!

Run your decentralized Renewables efficiently and put them to use flexibly. From solar PV generation to micro wind turbines and battery storage, include even electrical vehicle charging and integration!

A REbus™ microgrid is a flexible energy network operating alongside the existing AC distribution network. Click for some specs and details. REbus™ is the ideal standard for connecting different sources of clean energy, including solar modules and small wind turbines, into an integrated hybrid system. The REbus™ standard makes it possible to more efficiently store clean energy produced on-site, and is ideal for charging electric vehicles quickly. The performance of each product on a REbus™ microgrid is easily monitored through a built-in communication layer.

Clean power micro grid system, decentralized clean energy, home power, micor wind turbines

The REbus™ DC microgrid is a great solution for anyone looking to generate clean renewable energy whether on-grid or off-grid. It easily and efficiently integrates PV, wind and other alternative energy sources, allowing a single inexpensive inverter to connect to the utility grid. The communications link gives renewable energy consumers instant access to data from each of their renewable energy devices for monitoring or diagnosis.

Converting the power coming from your renewable energy source to a REbus™ microgrid is significantly more efficient than the same conversion to a convential AC grid. Plus, the high voltage DC transmission means lower current in the connecting wires which improves the power transfer efficiency.

Because of the reduced electrical current in the wires, the cost of wiring is reduced.

The integrated power line carrier communication scheme eliminates the need for expensive and unreliable wireless communications. In todays insanely wireless world, it is a good idea to use wired communications instead of Wi-Fi. Wired communications provide increase security, less EMF radiation and less exposure of humans, decreasing adverse health effects of EMFs. Optional Ethernet communications are also available.

The overall efficiency and flexibility of the REbus™ microgrid system is significant, reducing cost of de-centralized Renewables generation and further increasing acceptability and potential of these technologies by improved usability.


How to Ephemeralize Using Micro Wind and Solar Technologies

The concept of Ephemeralization is a very powerful description of the general idea of “doing more with less” or using resources efficiently. It has been described by Richard Buckminster Fuller, dubbed “Earth’s Friendly Genius”, as one of the Generalized Principles of the Universe and, thus, a powerful force that applies to each and every person or object just like a natural law (e g gravity).

Richard Buckminster Fuller, outlining the Generalized Principle of Ephemeralization (or “doing more with less”), has laid out the blueprint for an Economy of Abundance.

Generating clean energy from Renewables clearly is an integral part of what “Earth’s Friendly Genius” (Buckminster Fuller) had in mind. As a futurist, Buckminster Fuller knew very well that history is a reflection of the amount and efficiency of energy use by humans.

De-centralized clean energy from Renewables brings the individual (private households, small businesses, charities and other small organizations) closer to attaining Abundance. It helps us all leaving the iron grip of power companies, the national grid, bureaucracies and similar collective institutions behind and re-gain a part of our freedom and some wealth at the same time. Creating more energy than we consume, we even contribute to bringing about a wider Economy of Abundance along the way.


Small Wind: Home Turbine Airdolphin Z1000-24

Airdolphin Price Lowered by $300 Online for a Limited Time Special Offer

If you are interested in the High-Quality Japanese High-Tech Mini Wind Turbine Airdolphin Z1000-24, this may be your best chance of getting one at a significantly reduced price. Normally retailling in the U. S. between $5600 and $6500 or EUR 4900 in Europe, this next-generation Home Wind Turbine can be had for $5299 or roughly EUR 3900 plus shipping for a limited time only. We offer this popular small wind generator during the 2014 pre-construction season online at what appears to be the lowest price on the market. Compare prices for yourself and see if you agree and check for Airdolphin specs and details here.

Original Airdolphin Small Wind Generator Equally Useful for Island Grid/Off-Grid Deployment or as a Plug-In Turbine

One of the most silent small wind turbines on the market, Airdolphin is also one of the most innovative high-tech mini wind generators we have seen. Including no less than ten novel features, this mini wind turbine has much more to offer than just a very eye-pleasing appearance and the world’s lowest weight-to-output ratio of just 16.5 grams per Watt of rated power: Airdolphin’s overall power generation capability stands out and tops everything in its class, producing annual totals that make it a viable source of residential power.



small wind turbine airdolphin price home wind turbines

Airdolphin Well-Known Small Wind Turbine Brand Name

Due to extensive media coverage, Airdolphin has become something like a flagship Mini Wind Turbine and the darling of worldwide audiences. Despite the relatively high price per Watt installed and the rather steep $6000 to $6500 price tag usually attached to them by American vendors, there is tremendous interest in these two high-tech mini wind turbine models. After all, Airdolphin small wind turbines can still be cheaper and more efficient than solar PV, and the high-quality craftsmanship invested into Airdolphin small wind turbines on the manufacturer’s part and the resulting durability will go a long way in justifying the upfront cost.

  • rotor diameter 1.8 m
  • top power 3.2 KWp
  • generator voltage 24 V DC
  • inverters available for 230 V AC/120 V AC utility-grade power and/or grid-interconnection and feeding-out clean energy
  • cut-in windspeed 2.5 m/s
  • start-up windspeed (electronically) 0.0 m/s with ‘power assist’ function, improves extreme low-wind performance
  • extremely wide range of power-producing wind speeds: from 2.5 m/s to 50 m/s, i e from a light breeze to Taifun-force extreme weather
  • survival-windspeed of 65 m/s, meaning Airdolphin likely to be “last man standing”…
  • swing rudder system makes Airdolphin highly responsive to gusty winds and suitable for built-up areas, increasing total annual output significantly even in “unclean” wind situations
  • optimum 3.2 KWp power output reached at wind speed of 20 m/s for 20-40 secs
  • electronic generator breaking mechanism for RPM reduction in high winds and remote start/stop control (incl internet-based control and monitoring over standard web browser)
  • expected annual production of 1900 KWh to 2200 KWh at suitable sites
  • very good sites might come in at 2500 KWh/a or even more, depending on local wind situation
  • rated capacity 1.0 KW @12.5 m/s
  • UK green energy cashback of 39.3p per KWh exported to the grid (highest FIT band for <1.5 KW rated capacity)
  • exceptionally low noise levels due to advanced blade design
  • neat overall design with diecast alloy casing reducing optical impact on surroundings
  • maintenance-free design, electronically balanced blades, anti-corrosion teflon-based paint, screwless casing
  • design life of 20+ years
  • total weight only 17.5 kgs

Airdolphin small wind turbine output chart, micro wind turbines, SMA solar inverters, Enecsys micro inverters from and miniwindshop® online

A rich set of accessories, ranging from UL-certified/CE-certified grid-tie inverters to capacitor modules, a browser-based Remote Monitoring unit for controlling Airdolphin over the internet, and numerous additional system components are optionally available to add countless features to this truly unique and innovative mini wind turbine.

Airdolphin mini wind turbine proprietary controller, European-quality Home Power and micro wind turbines, SMA solar inverters, Enecsys micro inverters from and miniwindshop® online


Miniwindanlagen und Nennleistung: Die kleinen Mogeleien aus Asien

Die Gepflogenheiten bei der Ermittlung der Nennleistung bei Kleinwindanlagen werden von zumeist asiatischen Herstellern zunehmend unterwandert: im Bestreben, ihren eigenen Produkten ein auf den ersten Blick “besseres” Abschneiden zu ermoeglichen, versuchen die ueblichen eher zweifelhaften Vertreter der Branche in China (und mitunter auch Japan) durch “Nennwindgeschwindigkeiten” von albernen 12 m/s hohe “leistungsdaten” aus ihren Anlagen herauszukitzeln.

Wenngleich dies bei ahnungslosen Kaeufern leider zu Fehlentscheidungen (meist zugunsten irgendwelcher nicht-so-tollen Billiganlagen) fuehrt, vermag diese Praxis bei genauerem hinsehen natuerlich nicht zu ueberzeugen — fuehrt in vielen Faellen langfristig sogar zu eigener Rufschaedigung und unzufriedenen Kunden. (in der Regel ist der Kaufpreis dann jedoch laengst vom Hersteller einkassiert.)

Neben den genannten Billiganlagen aus China gehoert jedoch auch die technisch anspruchsvolle und solide gebaute Airdolphin-Miniwindanlage in diesen Bereich. Schade.

Die uebliche Meßmethode fuer Miniwindanlagen ist, die Nennleistung bei einer Testgeschwindigkeit von 8 m/s (und nicht bei 12) zu ermitteln! Auch fuer Miniwindsysteme (also Anlagen zwischen 1000 Watt und 15 KW Nennleistung bei 8 m/s) sollte dies gelten.

Die untere Grafik reicht ueberhaupt nur bis 8 m/s und ist damit ein laudables Beispiel…

Vergleichsdaten bei anderen Geschwindigkeiten, auch jenen oft in Taeuschungsabsicht herangezogenen 12 Metern pro Sekunde, koennen ja vom jeweiligen Hersteller gern zusaetzlich angegeben werden.

Angesichts dieser Situation ist es lobenswert, daß zahlreiche Europaeische, britische und amerkanische Hersteller weiterhin technisch einwandfrei bei 8 m/s messen.

How Solar PV Really Works

Solar PV produces electric current actually in a similar way as batteries albeit much more intelligently as neither any components wear out nor is there any poisonous substance involved (like acid in batteries, which also wears out through use). Solar cells, while also degrading as there is no Perpetuum Mobile in our environment, last a lot longer than those “stone age” or “state-of-the-Arch” energy generation technologies called batteries — PV cells usually last for 25 years with at least 80% of their original capacity — and can produce energy for 35+ years before they become really “sucked-out”.

Over 95% of today’s solar cells consist of the semiconductor material silicon. Semiconductors are materials whose electrical conductivity increases under light or heat.

For the production of solar cells, the silicon is doped, which means that other chemical elements are added to it, either creating an electron surplus (n-conductive layer) or an electron shortage (p-conductive layer). This means that the doped areas become charged, and if two differently doped semiconductor areas convene, a so-called space charge region is created at the boundary layer (p-n junction), meaning there is a difference in electrical potential across the boundary.

This is what makes them somewhat related to batteries which use acid and two different metals to create the same effect for a limited time — until the battery becomes dis-charched or “empty”.

In order to achieve the desired effect in solar cells, the initial silicon material is normally p-doped lightly and a thin surface layer heavily n-doped. This creates the space charge region required for separating the charge carriers, known as electrons (negative charge) and holes (positive charge).
Different than batteries, solar cells do not need any added substances (like acid) in order to work, but the entire process is induced by just exposing them to sunlight (or even just daylight, i e it also works on an overcast day).

When the energy from the sunlight hits the semiconductor material, the photons transfer their energy to the material, and the electrons and holes achieve a higher energy state, allowing them to move. The negatively charged electrons will move to the positively charged region, and the positively charged holes move to the negatively charged region. This process repeats itself, and the net flow of charge across the boundary is the electricity that is generated by that cell! To generate usable amounts of electricity, cells are arranged into modules, which are in turn arranged into your PV array.

The front contact is a metallic grid, enabling the sunlight to penetrate into silicon between the contacts. Moreover, solar cells are also coated with an anti-reflection coating, serving to protect the cell and to reduce energy losses resulting from reflection. This layer gives the solar cells their typical bluish black appearance.

The basic output is then converted to voltages and currents in accordance with specifications needed using rectifiers, inverters or micro inverters, and similar electrical equipment.

Rated Wind-Speed of Mini Wind Turbines: Asian Manufacturers’ Dirty Little Trick

Small wind turbine classification is somewhat blurred due to the fact that some manufacturers have been pushing to rate their turbines at a very high wind speed of 12 m/sec instead of the usual lower 8 m/sec. As this might give their turbines a less impressive image, resorting to that artificially high (and both unprofessional and rather sleazy) 12 m/sec “standard” is increasingly used in the marketplace by Asian manufacturers to trick buyers into believing that their products are more powerful than they truly are. This will lead to disappointment and dissatisfied customers in the long run. It might even give Mini Wind Power a bad name in general over traditionally less-economical Solar Energy photovoltaic technology and re-infuriate that quite unreasonable “holy war” between Home Wind Power and Solar Energy.

On top, that “little trick” from Asia is nothing more than unfair competition, confusing customers and, as a result, making many of them arrive at a wrong buying decision. Certainly for the advantage of cheap (but, at closer scrutiny, not-so-powerful Chinese, and sometimes Japanese) wind turbine models.

Many British, European and U. S. manufacturers’ adherance to that solid 8 m/sec rule is therefore very commendable. Ratings at different (higher) wind speeds can then be provided separately for easier comparison and debunking those Asian over-clocked “ratings”.

Home Power as a Business: Using Renewables for Hedging Yourself Against Two Major Risks

Home power may very well save you during the upcoming economic downturn. It’s a bit like owning precious metals or “opting out” of our over-networked way of life in other ways. The beauty of investing in residential-scale Green Energy is its capability of hedging against two of the most likely economic risks threatening your money today: overall currency instability and consumer price inflation. These might materialize as soon as the end of summer 2012 and would likely be visible as a slight — and then accelerating — downturn and an increase in prices including energy and utility bills at one go. The supporting fundamentals for both are in place, it’s just a matter of time for them to materialize. As noted above, both are likely to happen rather soon (and yes, even though it may sound contradictory from a conventional economic point of view to have both a severe recession or even deflation and an increase in energy prices at roughly the same time, this is still a very likely scenario).

Click here to read more…


Small Wind Turbine LE-300 Wren at a Glance

Small Wind Turbine LE-300 Specifications:

Rotor Diameter: 1 metre
Rotor Type: 3-Blade upwind
Blade Material: Glass Reinforced, UV resistant Nylon
Rated Output: 85watts @ 8m/s (18mph)
Peak Output: 300watts
Cut-in speed: 3m/s (6.7mph)
Weight: 6kg
Generator Type: 3-Phase Brushless NIB rotor PMA
Output voltage: 12 or 24V
Warranty 5 years

LE-300 low-price micro wind turbine

LE-300 is the most affordable and lightweight, yet powerful and robust micro wind turbine you can think of. With a rotor diameter of just 1.0 metres and its tiny weight of just 6 kgs, this low-priced and very versatile Home Power generator is fast and easy to set up and deploy. Quality-built in the U. K. and using maintenance-free and sealed-for-life rare earth generators, the design life of this unit is 20 years. Expected annual power production is 240 KWh to 1050 KWh (for sites averaging  4.1 m/s or 8.0 m/s resepctively).   Why choose the LE-300 Wind Turbine

  • Extremely quiet because of our WhispowerTM blades
  • Lightweight – just 6kg – and easy to mount
  • Starts generating in very low winds, delivers high power in very strong winds
  • Robust aluminium chassis finished using Airbus approved paint
  • A4 stainless steel fixings used throughout.
  • Pairs of top quality, marine grade, sealed for life bearings used
  • Excellent reliability with a 5 year warranty
  • Superior battery protection system