Interesting design and thank for submiting your entry so fast. I like #2 but plese do not make the logo look like the sun, we are not producing our electric from solar cell. We don't like round logo. Please make it Triagular, regangle or square. Also, no gradient color please.
#15 and 16 are very interesting. However, blue mountain give impression as cold snow cover mountain. We would like the mountains to be tropical, I think various shade of green should be more appropriate. I don't know what to suggest but please add some element to show that we are a power producing company as well. Maybe some orange...