What is on the Curtailment tab?
The Curtailment tab shows who limited the park, how much energy that cost and how available the inverters were. You also record a grid-operator notice here and follow a claim.
Why it matters
Curtailment by the grid operator may be compensated, but only if you can show when, how much and why. The same tab keeps curtailment apart from real outages, so the availability does not drop for the wrong reason. It backs up a claim and tells you whether an availability guarantee was met.
What you see
Tiles at the top
| Item | What it shows |
|---|---|
| Limits | The number of limits in the setpoint log, Last 7 days |
| By the grid operator | How many of them came from the grid operator or TenneT: May be compensated |
| Active now | Limits that hold At this moment |
Who limited the park?
A box about the sources of a limit: the logger's setpoint file, the Withthegrid Teleport or a notice from the grid operator. The Awaiting partner label stays while the Withthegrid link is not live. Sample data is added when rows in the setpoint log come from the simulator.
Curtailment per day
A table with one row per day, newest at the top. The choice next to it picks Last 14 days or Last 31 days.
| Column | What it shows |
|---|---|
| Date | The day |
| PV yield (kWh) | What the inverters delivered that day. A dash: no data |
| Curtailed (kWh) | The energy curtailment cost that day |
| Source | The source with the most curtailed kWh |
| Hours price ≤ 0 | Hours with a day-ahead price of zero or less |
| Avg. day-ahead price (€/MWh) | The mean day-ahead price of that day |
You only see the two price columns if you may see prices. Choosing a row opens that day in the chart below. The export button saves the table as CSV or Excel.
Irradiance and PV power
A chart of one day per quarter-hour: PV power, Irradiance and, hatched above the PV power, Curtailed. Day picks another day. The chart opens on the last day with curtailment, else on today.
Grid operator claim dossiers
This table only appears once the grid operator limited the park in the last 90 days. One row per limit:
| Column | What it shows |
|---|---|
| Start and End | When the limit held, or Ongoing |
| Source and Limit | Who limited, and to how many kW or what percentage |
| Lost (kWh) | The energy the limit cost |
| Measured source | The share of it that rests on a setpoint read from a source, not on an inference |
| Value day-ahead | The loss at the day-ahead price; only if you may see prices |
| Status | Draft, Submitted, Compensated or Rejected |
| Date | The date of that status |
| Amount (€) | The compensated or claimed amount; only if you may see prices |
| Dossier | PDF and CSV download the dossier. An Admin or Operator also sees Status |
Availability and losses
This block has the Model v0 label. The choice next to it picks Last 7 days or Last 14 days.
| Item | What it shows |
|---|---|
| Technical availability | Curtailment and a commanded stop count as available |
| Uncorrected availability | Only producing counts as available |
| Effect of curtailment on availability | The difference between those two, in percentage points |
| Contractual availability | The technical availability without the exclusions. Below it: the excluded hours |
| Contractual PR | The PR without the quarter-hours an exclusion touches. Below it: PR all quarters |
| Lower bound | The technical availability when time without data counts as downtime |
| Daylight hours | The daylight hours and the hours without data per inverter |
| Comparable inverters | The share of quarter-hours in which the possible power came from comparable inverters |
| From expected to actual yield | A chart from Expected through Outages, Derating, curtailment per source and Other to Actual, in MWh |
| Curtailment loss per source | Per source the Loss, the Market value and the Hours. Labels: inferred and Claimable |
| Needs review | Periods someone should look at, such as a stop without a known source. Only when there are any |
| Switch-offs | When inverters were off or limited, with Start, End, Cause and Inverters |
| State per inverter | A timeline with the Whole park row and the inverters that deviate. Show all inverters shows every one |
| Exclusions | Periods that do not count, with Object, From, Until, Reason, Reference, By and Status |
- Choosing a switch-off highlights it in the timeline. Clear highlight undoes that.
- An Admin or Operator sees Add exclusion and Withdraw.
- You only see the Market value if you may see prices.
- "No availability" means there are no computed quarter-hours yet.
Recompute
Admin only. Choose Last 30 days or Last 90 days and Recompute. Below it is the Last run with Queued, Running, Done or Failed.
Production forecast
Only when a forecast service delivers: Still expected today, Expected tomorrow and a table with Hour, Power and Irradiance.
Setpoint log
Every limit of the last seven days, newest at the top.
| Column | What it shows |
|---|---|
| Start | When the limit began |
| End | When it ended, or Ongoing |
| Source | Who limited, such as Grid operator · emergency, TenneT, Congestion contract, Export limit or Negative price |
| Limit | To how many kW or what percentage |
| Reason code | The grid operator's code with its meaning, or Not forwarded |
| Origin | How Alpha knows, such as Logger, Withthegrid Teleport or Grid-operator notice |
| Confidence | Firm or Inferred |
| Applies to | Park, one inverter or a number of inverters |
| Note | The note with the limit |
- Search… searches the rows. Source: all and Origin: all filter.
- An Admin or Operator sees Record grid-operator notice.
- "No limits in the last seven days." means the log is empty.
Solar park or battery
The tab is there for a battery too. The availability here is computed per inverter, so on a battery the Availability and losses block shows "No availability". A battery's figures are in Battery figures.
Who sees what
| Role | What they see and do |
|---|---|
| Admin | Everything, Recompute included |
| Operator | Everything except Recompute |
| Viewer | Reads everything, without prices and without buttons to record anything |
| Customer | Reads everything for their own sites; prices and euros only if Show value in € is on for them |
How to do it
- Open Assets, choose the site and choose the Curtailment tab. Open in Alpha
- Look in Curtailment per day for the days with curtailment. Choose a row to see that day in the chart.
- Did the grid operator call or e-mail? Choose Record grid-operator notice. Fill in Source, Reason code, Received by, Start, if needed End (if known), Limit in % or Limit in kW and Note, and choose Save notice.
- Was the limit lifted? Choose the open notice in the Setpoint log. In End notice, fill in the End and choose Save end.
- Want to submit a claim? In Grid operator claim dossiers, choose PDF or CSV next to the limit.
- Was the claim submitted or compensated? Choose Status, fill in Status, Date, Grid operator reference and, if needed, Amount (€), and choose Save.
- Should a period not count for the availability, such as planned maintenance? Choose Add exclusion in the Exclusions block.
- Did prices, the PR or a curtailment source change? An Admin chooses Recompute.