Checking the Client's Input
In the input parameters, you start by checking the data the client has sent.
Operating hours
A key element is the operating hours.
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Usually the number is given directly by the client.
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If it isn't given, it's calculated:
Operating hours = Storage Capacity (MWh) / BESS Capacity (battery)
The battery can't have a larger capacity than the grid — the system
(SourceTree) won't be able to read it. So if capacity grid < capacity bess, we use the grid's capacity in the calculation above,
not the battery's.
Once you have the number of hours, you pick the closer of the two available scenarios (2h or 4h — we don't run anything in between):
| Calculated hours | Scenario chosen |
|---|---|
| 2.3 | 2h |
| 3.5 | 4h |
There are small differences between the 2h and 4h scenarios, but they can produce a significant difference in the final results (usually deviations in fail rates, etc.). If you're not sure which scenario to pick, try one of the two; if it produces odd results, try the other.