The power generators I'm using are "Dark matter generators" from the Power Limiter mod. They're essentially solar panel + accumulator combinations except they cost more per MW produced and don't actually store energy but instead always produce at a constant rate. I would use a huge solar farm + accumulator setup but the increased load from the accumulators charging/discharging slows my game down too much.
If you want to get ahold of me I'm almost always on Discord.