[Logic Puzzle] Bending Power to your Will, pt 2!

[CherryKiss]

OK, here's the next challenge:

I want a power setup where I have steam send power ONLY to my laser turrets, and perhaps recharge some accumulators which help with turrets too. Solar will power laser turrets if steam is not enough, followed by helping recharge the laser accumulators, and finally providing power to the factory.

The factory is to shut down completely at night when solar goes offline.

Why, you ask? Because my factories are worked by imaginary invisible little workers, and they get nights and weekends off (we'll work on shutting power down to factories on weekends later, and use that power for the imaginary amusement park I am building for the worker's families :}

Once again:
Steam only for lasers.
Solar for:
1. Lasers
2. Laser accumulators
3. Factory (which shuts down with solar each night)

how do we make this happen?