This layout of cells will give you 1 power pack every 50 seconds. A single Jinamite Well should be able to satisfy a single powerplant.
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For those who want stats:A Solar cell produces 3 power per second
A Jinamite well requires 9 power per second to operate at all, but is most efficient at 20 power per second.
Each level of colony pod requires 1 more power than the last, this is effectively the number of lit windows at lower levels.
Currently the formula that dictates how fast a building operates is slightly cruel, if you have the minimum required power, it may take 10 minutes to actually make a single power pack... This will be changing