Hi, I like entry #36 best, could you please try make a few adjustments. 1. Maybe try the sun and word "solar" in a bright yellow. 2. Maybe make the blue, a nice dark but bright Green. 3. And take the leaf off.
Could you also maybe try make the same colour changes to entry #34
I've aimed to focus on giving this logo a look of being "Affordable". The square diamond with oversized sun gives a friendly and approachable feel whilst keeping a technical edge to the design.
I think the design says "I can afford that" rather than "too expensive".