I have been selling nickel iron batteries to people mainly in order to promote this green storage solution. But for those who want to import their own, I import mine from ChangHong Batteries in China. They are cusom manufactured upon the receipt of an order. To get our 200 amp hour batteries (22 of them) it cost $3200 with taxes and transportation.
That gives you an idea of cost. It seems from my website that I am a dealer but I am much happier if people import their own right from China. My goal was not so much for business but just to get them out there before the manufacturing process is lost. The Chinese do not sell many Ni-Fe batteries but they are starting to market them specifically for solar and wind storage.
Here is the web page in China ...
http://changhongzhou.en.ec21.com/If anyone wants to set up an importing business to help the solar / wind industry acquire Ni-Fe batteries this is the company to look to. It took me over a year to track down a good supplier. It was scary to simply send $3000 to China and hope for the best. Their batteries were high quality, shipped with the dry electrolyte and rubber vest to protect your clothes while charging. They sent a multimeter and hydrometer plus the metal plates to interconnect the cells. Very professionally shipped in wooden cartons.
I recommend contacting them and looking for a representative close to you to help establish contact.
A few more technical details ...
When mixing the Potassium Hydroxide be VERY careful to add KOH to water ... you cannot ever do it the other way around or it explodes into caustic steam.
I am happy to help out in any way to get the solar / wind industries to use nickel iron instead of the usual toxic batteries that are widely used for supposedly green energy. My strong feeling is that Lead Acid battery use should be discontinued if solar / wind are going to benefit the planet.
If anyone has difficulty establishing contact with ChangHong ... the language issue can be difficult ... I can supply a recommended contact who speaks English well.
Ian Soutar