Another version to include details on transmission lines and electrical power. If you would like a different font or visual, please send me a message here. Thanks!
Thanks for your hard works. #5 is too dark. It will be difficult to make a company seal. For #3 and #4, the white backgroud looks good. The font, however, is too "square". An example of fonts I like can be seen in the rackspace's logo: http://www.rackspace.com/ Also, a transmission tower or a thunder might be a good representation of our company.
Another idea I had for the transmission towers. Includes lightning bolt in a unique, cutout fashion. If this still does not seem like a trust-worthy logo yet, I can try and make it look more serious and masculine.
Another approach. I really like how this one is turning out, because it seems more masculine, yet it is simple and recognizable to make a brand out of. I hope you like it as well. The square logo shows the grid from the name of the brand by its shape and would also work well in small spaces, like in a web page preview icon.