Frequently Asked Questions

Please browse this section for answers to questions you might have about our products. If you do not find an answer to a query, please click here to Ask a question, and we will try to answer it in this section.

Energy-XS wind Turbines are vertical axis wind turbines, they start at low wind speeds and operate quietly, as such are ideal for installation above residences / buildings and of course for small scale industrial units.

Energy-XS turbines can be installed on the ground or roof. Various mast sizes can be selected depending on site requirements.

The annual mean recommended can be checked by using national wind speed databases. You may find one for your area on our site here. Alternately the XS-25 starter model can be installed to monitor satisfactory operation in your location.

Energy-XS wind turbines are available in the following sizes: 25W, 1000W, 2000W, 3500W and 5000W. Contact us if you need help making a choice.

We recommend a minimum annual wind speed of 3.5 m/s.

Energy-XS wind turbines can be installed on existing rooftops and terraces. Your contractors will have to contact us for mass and wind load data.

All wind turbines are rated at wind speeds of 9 m/s.

Please note that Energy-XS installations require a grid connection for all models except the XS-25 variety. The electricity generated by the turbine is primarily used to power the building. When more electricity then required by the site is produced, it is automatically exported to the grid. Offline versions can also be made available if required.

Energy-XS wind Turbines are currently available in India only. Overseas shipments can be considered if buyers undertake to install the sytems themselves. Prices range from Rs 20,000/- (US$ 500/-) to Rs 500000/- (US$ 11000/-). Current order lead times are around three months.

Payback times for the Energy-XS wind turbines are around 7 years and may be less depending on wind speeds and installation costs. Again multiple installations on the same site may reduce the payback time.

Please fill the online form so as to enable us to get an understanding of your site. We will contact a dealer in your region who will then meet you with a proposal.

Installations are warranted for one year on parts and labor

Energy – XS micro and small power solutions combine the proven Solar Photo Voltaic technology and Wind Turbines to give assured energy yields. As these solutions use Solar PV technology and wind generators, they have been dubbed as Solar / Wind hybrids. Incidentally the charge controllers used in our systems can also integrate other non conventional power generation options like thermal, solar thermal and hydro to increase the scope of hybrid power generation.

Normally the Wind to Solar ratio recommended in India is 60/40. Our 8KW hybrid systems are configured for 40% Solar and 60% wind and we see over 50% savings in capital costs as against a solar only installation for the same wattage. However the smaller hybrid units such as the Energy-XS 33W hybrid system use under 3% as the solar element to keep costs down and ensure adequate charging during night time with a larger wind impeller.

Even with the reduced cost of installed Solar PV per watt today (which is roughly Rs. 350/- per watt) an Energy-XS small wind system is still cheaper at one fourth that of solar PV on per watt basis. We use this price difference to engineer more reliable systems at greatly reduced prices as indicated above. Additional cost reduction happens as a result of the reduced battery backup needed in a Solar / Wind solution as against a pure solar or wind only solution.

Even with the reduced cost of installed Solar PV per watt today (which is roughly Rs. 350/- per watt) an Energy-XS small wind system is still cheaper at one fourth that of solar PV on per watt basis. We use this price difference to engineer more reliable systems at greatly reduced prices as indicated above. Additional cost reduction happens as a result of the reduced battery backup needed in a Solar / Wind solution as against a pure solar or wind only solution.

Wind has a high energy density, and output improves geometrically as wind speed increases. The principle used to convert the kinetic energy in the wind to electrical energy is simple, we all know of old Dutch windmills, and the dynamo on our bicycle. Joined together they are a wind energy plant!

All Energy-XS turbines are driven mounted on Vertical Axis rotor shafts.

One key advantages of VAWT is that they do not need to be pointed into the wind to be effective. This is an advantage on sites where wind direction is highly variable. VAWT also obviate the need for massive towers and can be mounted closer to the ground or on rooftops. As the generator is closer to ground, it is easier to maintain. VAWT's have lower start up speeds than HAWT's, typically generating power at windspeeds as low as 2 to 3 m/s and may be installed at places where tall structures are prohibited. VAWT's can take advantage of locations where mesas, hilltops, ridgelines, and passes funnel wind and increase wind velocity. VAWT's are also very quiet as they operate at low RPM's.

Energy-XS alternators and supporting electronics are environmentally sealed for reliable performance.

All systems require power storage, our hybrid as well as stand alone solutions save power in sealed maintenance free batteries of adequate capacity. Hybrid Solar and Wind systems have an added advantage of requiring less battery backup as they produce power day and night.

A typical 100w bulb produces 900 to 1000 lumens of illumination, and normally this light is omnidirectional. If all this light was made more directional as in an LED lighting source, we have a 100W bulb then producing 9 lumens per watt. Compare this with an LED light source which produces 100 Lumens for every watt, requiring just 9 watts to produce the same intensity as a 100W bulb! A 7AH battery can then store enough backup power for 9 hours.