Asset simulations
Asset simulations project the financial and technical performance of a single asset. They run automatically and are stored as versions, so you can trace which inputs produced which results, revisit past runs, and compare them with the asset's current configuration.
You can find asset simulations on the Simulation tab of the asset view.
Simulation versions
Whenever you change an asset, its associated PPA, or its scenario, Tensor Cloud automatically starts a new simulation run in the background. While a run is in progress it is marked Computing, and its results appear when it finishes.
Each completed run is stored as a version: a frozen snapshot of the full configuration used for the run and its outputs. A version does not change when you edit the asset afterwards, and it stays available until you delete it.
Selecting versions
Use the version dropdown at the top of the Simulation tab to switch between versions. Selecting a version switches the whole tab, including the summary and all results sections, to that run.
The version whose configuration matches the asset's current settings is marked Current, so you can see at a glance whether the results reflect the latest state of the asset or an older configuration.
Probability band
Next to the version dropdown, the Probability band toggle switches all results on the tab between the P50, P85, P90, and P99 levels of solar generation. P50 is the base estimate: actual generation has a 50% probability of meeting or exceeding it. Higher P-values assume lower generation and are more conservative: P99 is met or exceeded with 99% probability. The selected level also applies to downloaded results.
The toggle is disabled and only P50 is available when:
- the asset has no solar component,
- the asset uses a custom generation profile instead of the Tensor model,
- the version was created before P-values were introduced (run a new simulation to generate them), or
- the simulation is still running.
The solar losses chart is only available for P50.
Simulation summary
The simulation summary card shows the run date, the user who triggered the run, the version name, and the version description.
If the version was run with the Tensor default scenario, a warning above the summary states that the results rest on Tensor-provided assumptions that Tensor Energy does not guarantee, and that they should not be used for investment decisions. To base the results on your own assumptions, create a scenario and assign it to the asset.
Naming versions
By default, a version is identified by the date and time of its run. To make important versions easier to find, open the version actions menu and select Edit version to give the version a name and a description of up to 1,000 characters.
Depending on your workspace configuration, Tensor Cloud fills in the description with a short Japanese summary of what changed since the previous version, such as an increase in capacity or a newly added battery. You can edit or replace the generated description at any time.
Deleting versions
To delete a version, open the version actions menu and select Delete version. Deleting a version permanently removes its results, so you have to confirm the deletion. Deleted versions cannot be restored, but a new run starts automatically the next time the asset, its PPA, or its scenario changes.
Comparing configurations
The Configuration differences button opens a side panel that compares the configuration of the selected version with the asset's current configuration, so you can see what has changed since the run without checking each setting by hand. The button is not available on mobile devices.
Differences are grouped by settings category, and you can expand or collapse the groups one at a time or all at once. For each changed field, the panel shows the value at the time of the run next to the current value. If the selected version matches the current configuration, the panel says there are no differences.
The comparison always uses the asset's current configuration as the reference. You cannot compare two past versions directly.
Simulation results
Simulation results are shown on a single scrollable page. The side navigation on the left groups the sections into Basics, Electricity, Grid, Solar, Battery, and Financials, and jumps to a section when you click it. Solar and battery sections only appear if the asset has that component.
Performance overview
This section summarizes the main results of the simulation in KPI cards.
The Energy output card shows the total energy sold through the site meter over the asset lifetime and the energy curtailed by grid operator order (TSO curtailment). For assets with a battery, it also shows solar energy held back intentionally to meet FCR obligations (self-curtailment due to FCR).
The Financial performance card shows total lifetime revenues, the pre-tax project internal rate of return (PIRR), and the number of ¥0.01 slots on the day-ahead market during the asset lifetime, together with their share of all slots.
The Revenue streams card breaks down total lifetime revenues by source: FIT, FIP, PPA, day-ahead market, FCR, and non-fossil certificate (NFC) revenues, the latter split into bilateral agreements and the JEPX non-FIT market.
Battery performance
For assets with a battery, this section shows the main battery results: the number of battery cycles, how much energy was used to charge the battery from the grid and from solar, total battery discharge, the amount of curtailment avoided by storing energy in the battery, and the incremental revenues attributable to the battery.
Electricity flows
This chart shows where the electricity produced and stored over the asset lifetime comes from and where it goes: from irradiance and solar generation through losses such as inverter losses, inverter clipping, TSO curtailment, and FCR hold-back, into the battery and through the site inverter, and finally to grid export and import. Versions created before this chart was introduced do not show it.
Site meter discharge
This chart shows the energy sold through the site meter together with TSO curtailment and self-curtailment over the asset lifetime, in yearly or monthly resolution.
Solar generation
This chart shows the electricity generated by the solar component over the system lifetime, aggregated from 30-minute intervals into yearly and monthly values.
Solar losses
This waterfall chart shows how each of the loss settings reduces output, from available irradiance down to the energy delivered at the site meter.
Solar performance ratio
This section shows the performance ratio of the solar system, a standard measure that compares the actual output of a PV system with its theoretical output.
Solar yield
This section shows the first-year solar yield and its monthly breakdown, a quick way to gauge system performance. Annual degradation after year 1 can be set in the asset settings.
Charge and discharge
For assets with a battery, this chart shows battery charging and discharging over the asset lifetime, in yearly or monthly resolution.
Revenues
The revenues chart breaks down all revenue sources over the lifetime of the asset, such as market, FIP, FIT, and PPA revenues. In the chart options you can switch between monthly and annual resolution and hide specific revenue sources.
Revenues per kWh
This chart shows revenues per kWh of energy sold, which makes it easier to compare revenue quality across periods and with other assets.
OPEX
This chart shows all operating expenses over the lifetime of the asset as monthly or yearly sums. You can hide specific OPEX items in the chart options.
Net cash flow
The net cash flow chart combines generation, costs, and revenues into a simplified P/L statement for the asset. You can switch between monthly and annual resolution and hide specific items.
Cumulative cash flow
This chart accumulates the net cash flow over the asset lifetime, so you can see when the asset is expected to break even and how much value it generates in total.
Project value
The project value chart shows the remaining value of the asset in JPY over its lifecycle, as the net present value of future cash flows at a target rate of return. Enter a target project IRR (default 5%, between -30% and 100%) to see how the valuation changes with different return expectations. Values are calculated by month and update as you adjust the target IRR.
Downloading results
To download the results of the selected version, select Download PDF or Download Excel in the version actions menu. Downloads are available once the simulation has finished, and they follow the selected probability band and the language of the user interface.