Following is a link to Silicon chip mag here in Australia where a power meter monitor is described using a picaxe.
The picaxe code is downloadable and possible to rewrite similar in Arduino code. This artical uses RF modules for remote connection and a LCD display.
Of course the pulse counting feature is all that you may need but the RF monitoring is a good idea and maybe power the metter end from a cheap solar panel salvaged from a garden light.
http://archive.siliconchip.com.au/cms/A_112867/article.html
Enjoy