Light, buttons, motors, pumps, pivots uses energy. I think, we can use battery output how V (voltage). Voltage affect on current power of devices. Max voltage = 1, and if voltage <1, power of device cant be bigger than V*power(max).

*Generators in game show creating power in kW (kilo-Watts) and its looks truthfully. (1 light = 5W = 0.005kW, and at 1kW we can feed 200 lights)

Now, i write max power consumptions under.

Consumption calculator WMB (click)
This calculator show energy consumption or generation in battery. You need select battery number and battery type. Game batteries in 60 times have less capacity and very big power, its simillary graphite capacitor.

• Light (every element) - consume 5W
  Small light, spotlight, all buttons (and every in instrument panel), 1x1 monitor section (in big - multiply in number blocks), thrust level (when pushed), paintable indicator,
  
  
• RADARS
  Old normal radar - 6kW
  
  
• Other things
  Electric pumps = 60W (like all, if voltage 0.75, power = 0.75*60 = 45W and it will make 75% of job)
  Gun Feeder = 3kW
  Piston = 15kW (at speed 5)
  Pivot = 3kW (100%+ efficiency)
  Turrets = 75kW (at signal =1, if control signal = 10, power can be 200kW)
  Gearbox = 0W
  Clutch = 0W
  
• Max motor consumption
  1 Big motor = 3.2MW
  2 Medium motor = 800kW
  3 Small motor = 30kW
  4 Starter = 3kW (efficiency 200%) and consumption power depends on RPS (1.5kW at 4RPS)
  Magnet = like light, when light = 5W, when connected = 0W
  Door electro, all (when moves) = 57W, when stability - 0W
  Velocity pivot (motor 1000) = 160kW (at input = 1)
  Gyroscope = 60W (all time)
  Gimbal camera = 60W (when turning) = 5W (all time)
  Stabilized camera = 70W (all time)
  Camera small = 5W
  Camera medium = 5W
  Laser = 5W
  
  
  
• Radio devices
  Power in Watts
  

• Solar panel
  Its create power proportional light-power. Maximum power at full sun is 5.5W, average at normal day of live is ~1.6W
  
• Dynamic generators, dynamo-machines
  Create power when consume energy. Consume kinetic energy. How bigger rps, so many times bigger current. We can easy calculate this. I make a few calculators for generators. Power, when make by engine, sees really, and motors power sees really, its make really boost. Interesting - all generators can make 999999999 energy, but small generator better for <200kW (max 10kW in real life), medium (100kW;2mW) and <500kW in real, big generator most efficient less than 15MW.
  
  GENERATOR CALCULATOR (Alternator, generators)
  (click) RPS TO POWER calc
  (click) POWER TO RPS calc
  
  Standart fuel efficiency is 500kW per diesel at 10RPS. If you want use bad bugs, you can up it to 2x, 3x, 4x, 5x times, or just use bad infinity generator with 1GW power.
  
  At 15RPS Fluid sink can cooling 40kW, at 10RPS = 50kW
  Engine cyl power at 12RPS, kW
  .....................Atmosphere.....................Pump
  1x1..................7....................................15
  3x3..................100................................200
  5x5...................1000.............................2000

Old engines is bad generators. Bad eff,control, power per block.
Power in +- not scary RPS = 10
Big...................400kW
Medium...........100kW
Small...............30kW

My generator sample 24kW (click)

All batteries can give 600kW power at full charge.
Voltage/MaxPower (actually for motors)
1/600kW
0.75/400kW
0.5/300kW
0.25/150kW

If your motor 3.2mW, at 80% charge with full power you need 7 batteries.

Battery charge (Joule)..............energy/mass (Joule per mass)...........Per 1$............Per block
Small................1.6MJ.....................160kJ............................................10kJ.................0.800MJ
Medium.............12.8MJ...................213kJ............................................10kJ.................1.06MJ
Big......................265MJ...................320kJ............................................25kJ.................1.46MJ

• Formula for calculate work-time by this power
  
  P = your max power, kW
  V = voltage
  Vm = min
  VM = max
  E = Battery energy select (kJ)
  t = workTime on this power, Seconds
  N = battery number
  
  t = E*N*(1-P/(N*600))/P
  
  
• Calculate motor number very important for use max power at low voltage.
  Nm = motor number
  Vm = minVoltage
  P = needPower (kW)
  Pm = MotorPower (kW)
  Nb = needed battery number
  
  Vm = Pm*Nm/P
  Nm = P/Pm/Vm
  Nb = P/600/Vm