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Production and Calculations
Version francaise : Production-et-calculs
The server computes everything every 10 game minutes, whether players are present or not (sandbox SimulateUnloaded, on by default). The values below are starting values for balancing.
Solar day, wind curve and energy per day compared with a typical house.
P = nominal x source factor x condition factor x installation efficiency x sandbox multiplier
Each source smooths its output (30 game minutes response), so a passing cloud does not make the house flicker.
Condition factor = 0.5 + 0.5 x condition / 100.
| Condition | Factor |
|---|---|
| 100 | 1.000 |
| 75 | 0.875 |
| 50 | 0.750 |
| 25 | 0.625 |
| 0 | 0.500 |
Based on the installer's Electrical level when the device was placed.
| Electrical level | Efficiency |
|---|---|
| 3-6 | 0.85 |
| 7-8 | 0.95 |
| 9-10 | 1.0 |
Sine curve between the season's dawn and dusk. Clouds leave 20 % at full overcast: factor x (1 - 0.8 x clouds). Snow settles on the panel during snowfall and melts above 0 C (use the "Clear the snow" action). A new panel under a clear sky gives about 0.94 kWh per summer day and 0.60 kWh in winter.
- 0 below 10 km/h.
- ((v - 10) / 35)^3 between 10 and 45 km/h.
- 100 % from 45 to 85 km/h.
- 0 above 85 km/h (automatic brake).
- Wind is +15 % per floor, up to the 3rd.
| Wind (km/h) | Share of nominal | Power |
|---|---|---|
| 0 | 0 % | 0 W |
| 10 | 0 % | 0 W |
| 20 | 2 % | about 9 W |
| 25 | 8 % | about 31 W |
| 30 | 19 % | about 75 W |
| 40 | 63 % | about 252 W |
| 45 | 100 % | 400 W |
| 60 | 100 % | 400 W |
| 85 | 100 % | 400 W |
| 90 | 0 % | 0 W (brake) |
Values are the wind share applied to the 400 W nominal, before the condition and efficiency factors.
Produces day and night, about 2.9 kWh per day (120 W x 24 h). Rivers only: the engine cannot tell a lake's current. Season multipliers: spring x 1.2, summer x 0.8, autumn and winter x 1.0.
| Season | Power | Energy per day |
|---|---|---|
| Spring | 144 W | about 3.5 kWh |
| Summer | 96 W | about 2.3 kWh |
| Autumn / winter | 120 W | about 2.9 kWh |
(Nominal, before the condition and efficiency factors.)
- Charging: surplus x 0.90 (charge efficiency).
- Self-discharge: 0.2 % per day.
- When full, extra production is lost (shown as "production lost").
- Effective capacity = nominal x (0.4 + 0.6 x condition / 100) x
BatteryCapacityMultiplier.
The inverter supplies the demand from the current production first (x efficiency), then from the batteries. It can only restart when production covers the demand or the batteries hold more than 2 % of their capacity. Energy scale: 1 engine power unit per hour = 1,000 W (sandbox PowerScale).
Vanilla engine values, switched on:
| Appliance | Consumption |
|---|---|
| Light | 2 W |
| Radio on mains | 10 W |
| Television | 30 W |
| Fridge alone | 80 W |
| Stove, microwave, washer, dryer | 90 W |
| Fridge-freezer | 130 W |
| Stacked washer + dryer | up to 1,800 W |
One fridge-freezer and 10 lights is about 170 W (with the inverter idle 20 W), i.e. 4.1 kWh per day. A 14 h winter night needs about 2.4 kWh: roughly 4 car batteries or 2 deep-cycle batteries.
| Installation | Summer (kWh/day) | Winter (kWh/day) | Verdict for 4.1 kWh/day |
|---|---|---|---|
| 4 solar panels | 3.8 | 2.4 | Deficit |
| 6 panels + 1 wind turbine (average wind 25 km/h, about 0.7 kWh) | 6.3 | 4.3 | Just enough |
| 1 water wheel + 2 panels | 4.8 | 4.1 | Stable |
There is no limit: productions add up (100 W nominal each). The 1,500 W limit applies to the house demand, not to production.
Equipment - Maintenance and Skill - Sandbox Options - Optional Equipment