Current lab
Read the supporting lesson →Power budget
01
Source and loads
Budget energy before hardware
Loads
02
Model output
Energy and current check
Source rating warningThe simultaneous peak estimate exceeds the entered continuous rating.
| Quantity | Value | Unit / meaning |
|---|---|---|
| Average load power | 3.24 | W = Σ(V × I × quantity × duty) |
| Simultaneous peak load power | 29.9 | W = Σ(V × Ipeak × quantity) |
| Average source current | 0.498 | A, including conversion loss |
| Peak source current | 4.592 | A, conservative simultaneous estimate |
| Usable source energy | 14.8 | Wh = source V × Ah × usable fraction |
| Estimated runtime | 4.02 | h = usable Wh ÷ source-side average W |
| Load | Average W | Peak W |
|---|---|---|
| Controller | 0.6 | 1.1 |
| Gearmotor | 2.64 | 28.8 |
- Peak power assumes every load reaches peak current at the same time; it is a conservative simultaneous estimate.
- Estimated simultaneous peak source current exceeds the entered continuous-current rating; a separate peak rating was not provided.
Assumptions
- Each load's entered voltage and current describe its electrical power demand.
- Conversion efficiency applies once between the source and all loads.
- Runtime is an energy quotient; Ah is converted to Wh using source voltage.
Excluded effects
- Average load power uses duty cycle; peak power conservatively assumes all peak currents occur together.
- Capacity in Ah is not a current rating. Source protection, peak capability, charger, cell chemistry, aging, and wiring are not established.
- This is an energy budget, not guidance for assembling a bare lithium pack.
03
Evidence
Predict, observe, keep the mismatch
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