Wind generators have a natural appeal to sailors in need of extra power​. Our customer installed it on sailboat to help supplement his solar panel. He almost lives on the sailboat. Some people asks us which power supply (Solar panel or wind turbine) is suitable for his/her sailing boat. Budget are always the top problem that stop them from purchasing both power supply. However, we recommend using both at the same time. 

Hawaii is a state of the United state of America located in the Pacific Ocean.​ As you may know, throughout the year, ​Hawaiian weather are affected by trade wind and there are plenty of rainfalls in the mountains and valleys. Because of wind trade, there is always cooling breeze here.
Above pictures are from one of our customers, he lives in Hawaii. He installs this home wind turbine on his own. He is a good customer providing some installation info to us.
He uses 8 AWG wire and the interval between the wind turbine and the MPPT is 35ft. The battery capacity is 230Ah. The interval between the MPPT and the battery is 3ft. The tower height is 25ft. The wind speed in his area is 10-30mph.

It's happening! Our "Three Brothers" wind turbines is doing their live performance on Container House. Even thought the weather is not so good, they still perform pretty well.  What's more, the ticket is totally free. Come to join us and you will not regret.

This is our special guests "power bank". They are responsible for store your batteries and then take advantage of the build-in pure sine power inverters to turn DC current to AC current.
​Come to join us and you will not regret. Trust me!

By Sandy Gomez

What's the First thing that comes to your mind when you hear the word "off-grid" and "on-grid" ?
Pardon, What does it mean to be off grid?  What is difference between on grid and off grid?
Let me clarify something for you. 👇👇
What is On grid ?
A home that is connected to locally provided power source is considered “On-grid”. 
An on-grid can be practical if the following conditions exist:
You live in an area with an average annual wind speed at least 10 mph (4.5m/s). Utility-supplied electricity is expensive in your residential area. The utility’s requirement for connecting your system to its grid are not prohibitively expensive.

Photo credit: taiwantrade

Rather than waiting for the ice on the blades to be removed by direct sunlight or higher temperature, we have to find some active methods to protect our expensive wind turbine.
The problems occurs for wind turbine operating in cold region.
✔ Accumulation of ice on wind turbine blades resulting in reduced power output and increased rotor loads
✔  Mechanical and electrical failures due to higher load on blades
✔ Limited or reduced access for maintenance activities
✔ Measurement and control error and other safety hazard

Actually, there are a variety of different approaches to remove ice from blades. IEA wind recommends heating outer surfaces of blades or using Atifreeze coating.
Furthermore, there are various ice protection system technologies available on market.
✔ Hot air ice protection systems have a heat source combined with a high powered fan to circulate hot air to different areas of the blade.
✔ Electro-thermal ice protection systems have heating elements, typically carbon fibre, placed on the outer surface on the blade
✔ Microwave ice protection systems have a special outer coating on the blade surface that heats up when exposed to microwaves created by generators inside the blade
✔ Passive systems use blade coatings with special material properties to passively (no energy required) mitigate ice induced risks