What is on the Battery tab?
The Battery tab shows per day how each battery system of the site worked: power, state of charge, PCS, racks, alarms, availability and data quality. Below that, for the whole site, are the exclusions, the warranty, the capacity tests, the forecasts and the acceptance protocols.
Why it matters
Contractual availability and the warranty decide what the owner can claim. An exclusion or capacity test that is not recorded does not count. Without a field validation a battery report stays a draft.
What you see
The tab is there only for a site with a battery. Every role may open it, the customer too. Buttons that record, withdraw or calculate are shown to Admin and Operator only.
A table with rows has a download button at the top right (Export …) for CSV or Excel (.xlsx). A table without rows shows the empty text listed below.
At the top
| Part | What it shows or does |
|---|---|
| Fetching first data… | Shown at the top while the site's first data is still coming in |
| Sample data (simulator) | Notice when a system still shows sample data, with Waiting for the pilot site's EMS export |
| ← Previous day, the day, Next day →, Today | Picks the day of every card. Today goes back to today |
| No battery system | Shown instead of all cards when the site has no battery system |
Per battery system
These cards are there once per system, in this order.
No battery data with Waiting for EMS export is shown at the top when there is no data for this system yet.
The system card. The title is the name of the system. Below it are power, energy, cell chemistry and the number of containers, racks and PCS, such as "880 kW · 2.3 MWh · LFP · 8 containers · 8 racks · 8 PCS". When the system shows sample data, it carries the label Sample data.
| Tile | What it shows |
|---|---|
| State of charge | The state of charge of the latest reading, with Charging, Discharging or Idle below it |
| Power | The PCS power of the latest reading as "Discharging …" or "Charging …"; below 1 kW Idle. The time below it |
| Charged (day) | The energy that went into the system that day, At the point of connection |
| Discharged (day) | The energy that came out of the system that day, At the point of connection |
| Round-trip efficiency | The efficiency of the day, measured on the AC side of the PCS, only on a day with a full cycle |
| Available discharge power | The power the system could discharge at the latest reading, with "today" and the availability in time below it |
Below the tiles is the day's chart with Power at connection (MW, + discharge), SoC (%) and Day-ahead price (EUR/MWh). Without readings it says No data.
PCS status: one row per PCS.
| Column | What it holds |
|---|---|
| PCS | The name of the PCS |
| State | Running, Standby, Derated, Fault or Unknown |
| Power | The power now |
| Available / rated | The power it can deliver now, next to its rated power |
| Derate | Why it delivers less: Temperature, Grid or SoC limit |
| IGBT temperature | The temperature of the power electronics |
| Racks | The number of racks behind this PCS |
Racks per container, with the subtitle Hottest cell · latest reading of the day. One row per container, one tile per rack with Rack and its number, the hottest cell in °C and "SoC … % · ΔV … mV". A rack without a connection gets "offline". The colour follows the hottest cell: a cool colour below 20 °C, neutral from 20 to 30 °C, and warmer from 30, 35 and 40 °C. Point at a rack for its PCS and the number of the hottest sensor. Choose a rack or container to open that part on its own.
Cell extremes per rack: Container, Rack, PCS, SoC, Highest cell (V), Lowest cell (V), ΔV (mV), Hottest cell and Coldest cell. The cell voltages are in mV; the number of the cell or sensor follows, such as "(#12)". Empty: No data.
Battery alarms (BMS/PCS): the alarms the BMS and the PCS raised themselves, with Alarm, Device, Status (Open or Closed), Raised, Cleared and Evidence. When an alarm has evidence, the button Files is there. Empty: No battery alarms.
Availability: six tiles, only when there is an availability for the day.
| Tile | What it shows |
|---|---|
| Availability (time) | The share of time the PCS units were available, with the threshold |
| Availability (power) | Availability weighted by power, with the hours not deliverable |
| Availability (contract) | Availability without the time inside an exclusion, with the minutes excluded |
| Monitoring | The share of the day readings came in |
| Last … days | Availability in time over those days, with the one in power below it |
| Contract | The percentage the contract asks |
Availability per PCS: PCS, Available in percent and Unavailable in minutes. Empty: No availability for this day.
Data quality: the title gets the day's score and verdict, such as "Data quality · 87 of 100 · Uncertain". Per check Check, Measured, Limit, Parts and Status (Good, Watch or Bad). Empty: No verdict for this day.
Anomalies (shadow) · … judged: the racks and containers that differ from their peers, with Component, Quantity (Max. cell temperature, State of charge avg., Round trip (DC) or Max. C-rate), Value, Median, Z-score and Signal (Outlier or Drift). Empty: No anomalies.
Lifetime record, with the label Annex VII basis.
| Part | What it shows |
|---|---|
| Energy throughput (DC) | Throughput since the first day, with the number of days; the boundary is in brackets |
| Energy throughput, 12 months | Throughput of the last twelve months, with the start date |
| Equivalent full cycles | Cycles since the first day, with the cycles on the selected day |
| Time above temperature limit | The minutes the hottest cell was above the limit, 40 °C by default |
| Highest C-rate | The highest C-rate when discharging, with the one when charging below it |
| Bar chart | Charged (MWh) and Discharged (MWh) per day |
| Two charts | Hours per SoC band (5 %) and Hours per °C hottest cell of the day |
| Two charts | Charging per C-rate (hours), Discharging per C-rate (hours) and Cycles per cycle depth (% SoC), when that data is there |
For the whole site
| Card | Columns and buttons | Empty |
|---|---|---|
| Exclusions | Add exclusion, Day log CSV and Exclusions CSV. Columns System, From, Until, Reason, Reference, By, Status (Valid or Withdrawn) and Actions with Withdraw, or the reason it was withdrawn | No exclusions |
| Warranty · Since … · … years | One card per system with warranty terms, otherwise it is not there. Term, Measured, Limit, Period and Status (Within, Near, Exceeded or Unknown) | No warranty terms |
| SoH estimate (indicative) | Calculate. Per rack Rack, Estimate, Interval (90 %), BMS, Against first estimate, First estimate, Capacity (Ah), Anchor pairs, Period, Method and Status: Estimated or the reason there is no estimate | No estimates |
| Capacity tests | Add test and Import. Date, Part, Kind, Capacity, SoH, Guaranteed, Efficiency, Conditions, Test window, Meter, Own reading, Report, Status (Valid or Voided) and Actions with Void | No capacity tests |
| Energy balance · 30 days | System, In (POI), Out (POI), Stored, PCS loss, Battery loss, Auxiliary, Other, RTE DC, RTE PCS, RTE POI, Boundary, RTE corrected and Guaranteed | No energy balance |
| Peak shaving · 30 days | System, Peak without battery, Peak with battery, Peak reduction, Contracted import, Of target, Setpoint deviation, Within 1 % and Periods | No peak shaving |
| Anomalies against reported faults · 30 days | Above it the tiles Flagged parts, Confirmed, Precision, Parts with a fault and Recall. Columns Component, First day, Last day, Days, Quantity, Reported fault and Lead (days) | No flagged parts |
| Degradation forecast (trend) | Per system one row for BMS and one for Capacity tests: System, Source, Points, SoH now, Loss per year (90 %), End of life and Status (Indicative, Too few points, Record too short or No decline) | No forecast |
| Field validation of report figures | Record validation. Date, Reference, By, Status (Valid or Withdrawn) and Actions with Withdraw | No field validation |
| Acceptance protocols | Start SAT and Start UAT. Protocol, Status (Open, Accepted, Rejected or Withdrawn), Steps, Started, Signed, By, Client witness and Actions with Open | No protocols |
Add exclusion, Calculate, Add test, Import, Upload report, Void, Withdraw, Record validation, Start SAT and Start UAT are shown to Admin and Operator only. Add test and Import are there only when the site has parts to test. Start SAT or Start UAT is greyed out while a protocol of that kind is open.
A rack or container
When you choose a rack or container, it opens on a page of its own. At the top right you choose 24 hours or 7 days.
| Part | What it shows |
|---|---|
| Tiles | SoC, Hottest cell, Coldest cell, Voltage spread and Last reading |
| SoC per rack | The state of charge of each rack over the period |
| Cell temperature and voltage spread | Hottest cell (°C) and Voltage spread (mV) |
| Current and voltage | Only for a rack: Current (A) and Voltage (V) |
| Racks | Only for a container: per rack the SoC, the hottest cell and ΔV, as a link |
| Per day | Day, Charged (kWh), Discharged (kWh), Round trip (%), Avg SoC (%) and Max cell temp (°C) |
Without readings it says No battery data.
How to do it
- Open Assets, choose the site and the Battery tab. Open in Alpha
- Step through the days with ← Previous day and Next day →. Today takes you back.
- Click a rack or a container in Racks per container to see that part on its own.
- Does an alarm in Battery alarms (BMS/PCS) have evidence? Choose Files and download the readings around the alarm.
- Did a period not count for the contract? In Exclusions choose Add exclusion. Fill in System, Reason, From and Until, on the site's clock. Reference and Note are optional.
- Want the availability per day or the exclusions in a file? Choose Day log CSV or Exclusions CSV.
- Record a capacity test in Capacity tests with Add test, or read a CSV with Import. Fill in at least Part and Measured capacity (kWh). Upload the test report as a PDF with Upload report.
- Run the own SoH estimate again with Calculate in SoH estimate (indicative).
- In Field validation of report figures, use Record validation to record that the figures match the device's export.
- In Acceptance protocols choose Start SAT or Start UAT. Set each step to Passed, Failed or N/A and choose Sign with the name under Client witness.