FAQ

We’re continually adding to the FAQ. Can’t find what you’re looking for?
Message your Customer Success Coach in-app or email support@gridcognition.com

Projects

Can I still work on my project when the Simulation is running?

No you can’t. However, you can cancel a run if you know there’s something you’re not happy with.

Can I add more than one retail or network tariff to my project if I’m unsure which tariff the site is on?

Yes, if you’re unsure, you can assess the impact of potential tariffs by creating multiple scenarios and applying different tariffs to each.

How do I remove a site from my project?

Go to the scenario > sites and select the site you’d like to remove using the site selector. Click the ellipsis next to the site tile (the one with the map) and then click the delete icon. It’s important to note that deleting a site from one scenario will delete it from all other scenarios.

Library

How do I upload market pricing into the Library?

At the moment, uploading custom market data is an admin-only feature as the data comes in a wide range of formats. It sometimes needs tweaking so if you need to upload market pricing, contact support@gridcognition.com with the details we will get it sorted out for you.

Can I create a tariff in the Network Tariff Library?

You can clone an existing tariff but you can’t create a new one from scratch. If there’s a tariff you would like us to create, just contact support@gridcognition.com with the details.

Results

How do I download the data from the Results page?

There’s a download button on each tab. Just scroll to the very bottom of the page and press ‘Download’. Then you can select the format you want to see the data in. Select Crosstab if you need the data in csv format. 

What are are Relative Cashflows?

Relative Cashflows are the total cashflow differences for that particular project permutation relative to the baseline. On the Project Options Overview tab, it’s the total over the entire project duration. In other places, for example the Relative Cashflows tab, we show both the project total and the annual totals.

Is it possible to see my project results from a previous version?

Yes, by re-running a previous project design. If you go to the History tab of your project, you can select a previous version (that has gone through the simulation process). To revert back that scenario, choose ‘Fork from Version’ and then ‘Create New Simulation’. You’ll then need to re-run that version that you’ve reverted back to.

How are Opex costs calculated and what are the units of Opex? For example, it looks like $/kWh with a default for batteries of $5/kWh.

Opex are all annual costs that will be billed monthly in the cashflows. So, $5/kWh for storage would end up as an annual Opex of $500 if you had a 100kWh of storage. $42 a month in the cashflows ($500/12 months).

Battery

What is the battery duration parameter?

Battery duration determines the inverter sizing that gets modelled alongside the battery storage capacity. So, for example, if you have a 100kWh battery with a 1 hour duration then that will model a 100kW inverter coupled to your 100kWh of storage cells. If you select a 2 hour duration then a 50kW inverter, 4 hour duration a 25kW inverter. You get the idea. You can model the same sized battery with multiple different inverter rates (battery durations) to see which gives best commercial return.

In battery settings, can you explain the difference between the two modes: self-consumption and co-optimised?

Self-consumption mode is where you use excess solar to charge the battery i.e. solar that is surplus to the site’s requirements, and discharged as soon as there is site load to discharge into. Co-optimised mode is when you fully optimise the battery based on the price signals the site or participant is exposed to. The intent is for co-optimised assets to perform in a way that delivers the greatest possible commercial return. This can include all energy and demand tariff components, along with capacity-type items like FCAS (Australia) or Dynamic Containment (UK). Optimisation uses full-resolution interval data and considers the uncertainty settings applied for load forecast and market forecast.

Can you include an inverter replacement cost for a future year for a battery?

(For example, you want to include additional capital costs for inverter replacement 15 years after installation). 

Yes, we can future date your hardware capex costs using the Equipment Prices area of the library. 

If a co-located battery charges from the grid and then discharges later in the day, are the discharged units counted as PPA revenue and billed to the customer?

No. That would only happen if the battery charged from the solar and increased the net generation consumed on-site. You also can’t have a PPA attached directly to a battery. Although, you can have a PPA attached to a solar system where the battery can impact that PPA by storing (and then on-selling via the PPA) solar PV output that would otherwise be wasted or sent to the grid.

Solar

Where does Gridcognition pull the solar yield from?

We source irradiance data from Solcast for the relevant lat/long and then put it through PVLib from the National Renewable Energy Laboratory (NREL) in order to calculate the system yield based on the irradiance and the solar parameters you configure in the site model, so panel size, orientation, tilt etc.

Does Gridcognition automatically create solar data for a PV system?

Yes, the Gridcognition platform will automatically create a solar system yield using the longitude and latitude coordinates for your site together with the system parameters you specify. However, if you have your own modelled solar data for a site from third-party software, perhaps because you’ve used PVsyst or similar, then you can upload it to your Library and add it to your simulation. So, your two options are: 1) Create the PV asset in Gridcognition and it will be modelled for you or 2) Upload your own solar yield data.

We have arranged a 4c solar feed-in tariff with the retailer. How can I reflect this in my project?

The easiest way is to find an existing FiT in the library under Retail Tariffs and clone that. Then you can then adjust the rate to whatever you need it to be and then add it to your site as a Retail tariff. Don’t forget you always need to set up the value flows any time you apply a tariff or cost to a site. In this case you’ll want the FiT to be an inflow for the site owner. 

Environmental

What are the default rates used for LGCs and STCs?

LGCs are based on a forward price curve which you can see in the ‘Rates’ tab of the Results. With regards to the STCs, they are currently a flat price. The STC rebate is a one-off event that gets applied at a single point in a project.

Why do the "Certificate" savings stop after 10 years? Is this because LRECs and SRECs still stop in 2030?

Yes. Currently the national Renewable Energy Target (RET) in Australia, which drives the STC and LGC markets, is only set up to run until 2030.

Where does the CO2 emissions data come from?

For Australia and for the NEM we pull the generation emissions values from AEMO for each 30 minute interval and create a volume weighted average for each market/State. For the WEM, which doesn’t have easily accessible emissions data for each generator, we use the National Greenhouse Accounts scope 2 emissions factor for the South West Interconnected System (SWIS).

How is contingency FCAS revenue calculated?

For customers looking to provide market services, the Gridcognition software allows you to model potential revenue from all six contingency FCAS markets in the NEM. By default, we use the last 12 months of historical contingency FCAS prices published by AEMO. The prices are cast forward for future years. The prices are capped at the 75th percentile for each market for each month to avoid ‘over indexing’ on volatile historical events that would have a very significant bearing on the future forecast. The price is averaged for each market for each month – the expected value for randomly occurring events should be equal to the mean.

Need something else?

We’re always updating the FAQs,  If you are stuck, just use the in-app chat to ask for help, or email our support team.