Release Notes

Search a postcode or place, or drop a pin, to see the local substation and the main substations above it, with the room each network operator publishes. Describe new homes by bedrooms, heating and car charging, or a business site, and see the demand, whether a new substation is likely, the connection cost block by block with its published range, the deadlines for a budget estimate and a formal quote, and the yearly network charges. Download the answer as a PDF with every source. Updated automatically as the network operators publish.

Enter the site's current capacity and the capacity it needs. The yearly charges keep the site's current TNUoS band, because a change of capacity on its own does not move it.

A connection answer now arrives in about two seconds, down from as long as eleven, and a postcode search in about one.

Pick new homes, a new business site or an existing site, and see only the questions that apply. An existing site is chosen up front, so its yearly charges keep its current TNUoS band.

Every map world now has zoom in, zoom out and show-all buttons. In Connections World, tap Room, Limited, Full or Not published in the key to show only the substations you want.

Night and day, and peak and baseload, price ratios are now worked out from a complete run of market data.

The MIC and TDR band tables in the glossary now show the thresholds the tools use.

Search by name, company, postcode or MPAN, or browse by region and site type. Open any site to see its own DNO charges for every year since 2022-23, its connection, the company behind it, and its energy contracts and emissions where a public record exists.

Every charging year, import and export, with every source listed.

One set of inputs, agreed capacity and measured peak in kVA or kW, now returns the DUoS capacity saving, the TNUoS band move and the combined total, with a year-by-year table for each. Both figures come from the same recommended kVA, so the distribution and transmission answers never disagree.

For a supply connected at 22kV or above, the distribution capacity charge is read from that site's own published EDCM tariff rather than a generic table, and the figure is labelled indicative because the network operator re-models site rates each April. The transmission band answer applies as normal.

The voltage level that sets your transmission band is read from the MPAN and shown on the inputs screen, so the transmission and distribution figures always describe the same supply.

If a supply's line loss factor class is not in our mapping, the result now says so and names the fallback tariff used, so you can check it against the tariff line on your DUoS invoice.

The 18 September release said the Capacity Optimiser priced a TNUoS band move from a capacity reduction. It does not, because DCUSA Schedule 32 allocates a site to its residual charging band for the whole price control period: RIIO-3 bands hold to 31 March 2031 whatever happens to the agreed capacity. The same claim first shipped in the v1.3 and v2.1 band optimiser notes below. The tool has been corrected to show the band you hold and to price the distribution savings on their own. Those distribution savings were right and are unchanged. Two things still pay: a site allocated to the wrong band can dispute it and recover up to six years of overcharge, and the next capacity measurement for banding is January 2029.

Set consumption_source to "platform" on POST /api/v1/calculate and send only an MPAN. Using your registered ElectraLink credentials, the API retrieves the supply's half-hourly settlement data and prices every network, transmission and policy charge from the actual load. This covers half-hourly settled import supplies (Profile Class 00).

Settlement-Sourced Pricing now reaches ordinary non-half-hourly meters (Profile Classes 01 to 08). Send only an MPAN and the API sources the supply point's Estimated Annual Consumption, apportions it to your billing period, and prices the full network-charge stack from it. The result is labelled an estimate throughout, so an estimated figure is never mistaken for one priced from metered half-hourly data.

Store your ElectraLink credentials from your account portal or with PUT /api/v1/electralink-key. The API verifies them live when you save and never displays them again. Update or remove them whenever you need to. The portal manages a credential for each ElectraLink product you use, each tested, replaced and removed on its own.

When a supply is outside coverage, or its data cannot be sourced for the billing period, a platform-sourced calculation returns a labelled reason and no priced figure rather than a silent guess. Where a figure is priced from an estimate instead of metered half-hourly data, the response says so plainly, so an estimate is never mistaken for a metered figure.

POST /api/v1/calculate takes a supply and a period and returns each network and policy charge as its own priced line: CDCM DUoS, TNUoS, BSUoS, CCL, CfD, Capacity Market, AAHEDC and Nuclear RAB. It covers standard non-half-hourly supplies on Profile Classes 01 to 04, including Economy 7 and Economy 10 day and night registers. The API computes every figure from published rates only, so each line ties back to the DNO or levy body's own statement, and it discloses any figure that rests on an assumption. When a supply, charge, consumption format or period falls outside what the endpoint prices today, the API returns a clear reason instead of a number, so it never hands back a partial result as if it were a total.

The calculator priced the TNUoS locational (peak-time) element for maximum-demand sites on Profile Classes 05 to 08 on the half-hourly Triad basis, which relies on a Triad demand figure these non-half-hourly sites do not have. These sites are now priced on the estimated 4pm to 7pm consumption basis, the same method as other non-half-hourly supplies, using the published Elexon settlement profile for the class. A Triad demand figure entered for one of these sites no longer affects the result, and billing periods before the 2026-27 charging year use the 2026-27 published profile shape as the reference, labelled on the result.

The 2026-27 AAHEDC charge now reflects NESO's final published rate for the year across every tool, so the figure ties back to NESO's own 2026-27 tariff.

A new By region tab alongside the classic By MPAN lookup. Choose a DNO region, then the demand or generation cohort (never blended), then a charging year, and see the spread of Super Red, capacity and fixed charges across the sites we hold, shown as a median with the full observed range. The list shows each site's operator or asset name where held, so you know what you are opening, and any site opens to its complete site-specific EDCM rate card.

The Connections Advisor can now compare an EDCM distribution connection against a direct-to-transmission connection on large EHV sites. The add-on appears at 30,000 kVA and above, defaults on, and can be switched off, with results framed against the EHV distribution baseline.

A peak-time (Super Red) charge toggle on the EHV connection form defaults on or off from how common the charge is across that region's EDCM sites, shows the regional percentage, and stays user-overridable. When off, the Super Red component is zeroed in the estimate while fixed and capacity are unaffected.

The what-if sliders showed inflated current and target annual costs because the daily fixed charge was added at the wrong scale. The £ figures beside the sliders and the savings percentage are now correct. Server-side calculations were never affected.

When Nuclear RAB is selected in Validate Past Charges, the levy is now included in the combined total returned by the calculation API and in saved calculation summaries, matching what the results screen already showed. Billing periods before the levy started in December 2025 are correctly left without a Nuclear RAB line.

Decoding an MPAN now shows its TNUoS zone and connection voltage. Enter the Maximum Import Capacity from the bill and the tool resolves the published TDR capacity band and an indicative transmission demand residual in pounds per day. Neutral facts, no verdict.

EHV lookups now show the site operator, connection type, voltage level, an indicative capacity, and address where available, drawn from public network registers and Companies House. An Assumptions and Methodology panel sets out every source and how confident each match is.

Site identity now extends to independently-connected (IDNO) EHV sites, not just the 14 DNO regions.

A signed-out manual EHV lookup now correctly shows the sign-in prompt instead of appearing to do nothing.

A deterministic, bottom-up tariff builder. Dedicated long-form product page at /pricing-engine with full methodology, FAQ and audience use cases.

Overview (14-region price grid), Breakdown (full cost cascade), Profile Class (compare PC variants side by side), and Unit rate (the tariff sheet you can hand to a pricing manager).

Contract length slider with date pickers, VAT toggle, Annual vs Contract view, Custom kWh override (replaces the Ofgem TDCV default), an Other Costs drawer for bespoke rows, and an Assumptions drawer for the commercial layer (margin, hedging, shape, imbalance).

PC01 single-rate, PC02 Economy 7 (day / night), and PC02 Economy 10 (off-peak windows). Each profile class carries its own sourced time-of-use shape.

Default Overview lays every region next to every other. Click any region to focus the rest of the workspace.

Now the first item in both the Consultant and In-house Electric task flows on /tools.

New flagship product band on the homepage between the bespoke-tools narrative and the final CTA. Existing "Platform." hero kept verbatim.

Pricing Engine surfaces on /for-enterprise as a dedicated section, and on /for-consultancies as a flagship strip above the workflow cards.

Pricing Engine sits above the Standard tools bundle as its own product card. Talk to us about access.

Two new entries on /learn covering what Pricing Engine is and how the cost stack is layered.

Expand the DUoS row in either forecast tool to see Consumption (Red/Amber/Green unit rates) and Fixed/Capacity (standing + capacity charges) as their own lines, each with its individual year-on-year change.

Each MPAN in the Portfolio Forecast now displays its TDR band (Band 1–4) inline with the meter name, so you can compare residual bands at a glance without expanding into TNUoS detail.

Removed the duplicated year labels from every row. Each charge section now shows a single column header (current year / forecast year / change) over neatly aligned value columns.

Self-tuning fallback for the D0018 consumption coefficient means non-half-hourly forecasts for years beyond the published horizon now produce results where they previously failed.

When DUoS or CCL rates aren’t yet published for a future year, the forecast now applies a flat-carry from the latest available year and the Assumptions & Methodology panel makes that provenance explicit.

New calculator mode to analyse whether your agreed capacity (MIC) is oversized. Enter your MPAN or manually specify voltage level, MIC, and maximum demand to see if you could save by moving to a lower TDR band.

Toggle between annual view and 3-year total to see cumulative savings opportunity. Year-by-year breakdown accordion shows exactly how costs compare each charging year.

Get a recommended MIC value that maintains a safe margin above your peak demand while moving you to the optimal TDR band.

For EHV sites, see warnings about threshold changes in April 2026 that could affect your band - helping you plan ahead for RIIO-3.

New calculator mode for energy consultancies to model DUoS savings from load shifting. Enter your MPAN and consumption, then use interactive sliders to explore how moving demand between Red, Amber, and Green time bands affects your annual costs.

Intuitive R/A/G sliders that maintain 100% total consumption. Reduce Red and the reduction cascades to Amber; reduce Amber and it flows to Green. See your potential savings update in real-time as you drag.

Don't know your R/A/G split? Enter your total annual consumption and we'll estimate the split using D0018 profile coefficients for your meter's profile class, or time band hours for half-hourly meters.

Clear before/after comparison showing baseline costs vs shifted costs. See exactly how much you could save per year by optimising when you use electricity.

Enter a generation MPAN and the calculator automatically detects it from your LLFC. The interface adapts to show "Export kWh" instead of "Usage kWh" and displays DUoS credits (negative rates) with green styling.

All 8 CDCM generation tariff categories are now supported (LV_GEN_AGG, LVS_GEN_AGG, LV_GEN_SS, etc.). Generation tariffs have negative unit rates, meaning embedded generators receive credits for the electricity they export to the grid.

Embedded generators can calculate their EET credits by entering their Maximum Export Capacity (MEC). EET is a credit paid annually based on your connection capacity, calculated as MEC × EET rate × billing days.

Generation MPANs work in Budget Forecast mode too. See how your export credits will change year-over-year using published future rates.

TNUoS capacity inputs (MIC, voltage level) now only appear for half-hourly customers who need them. Non-half-hourly customers (Profile Classes 01-04) no longer see these fields since their TDR band is determined automatically from annual consumption.

Non-half-hourly demand calculations now complete in ~4.5 seconds, down from 30+ seconds. Fixed an N+1 query issue with BST transition lookups.

The Customise Test MPAN modal now includes a Demand/Generation toggle. Select "Generation" to generate test MPANs for export meters, making it easier to explore how embedded generation credits work.

Budget Forecast now correctly includes negative charges (credits) in the year-over-year comparison summary.

Predict future electricity costs using rates published 12-18 months in advance. Compare current vs future charges side-by-side for DUoS, TNUoS, BSUoS, CCL, CfD, and Capacity Market.

CCL is now available alongside DUoS, TNUoS, BSUoS, CfD, and Capacity Market charges for non-domestic customers.

Cleaner interface when your billing period crosses April 1st, with better mobile layout and consistent design across both calculator modes.

New segmented S-Box Grid layout that mirrors how meter numbers appear on bills. Each segment (PC, MTC, LLFC, DNO, Unique ID, Check digits) has its own input field with color-coding for easier data entry. You can now edit individual segments without retyping the whole MPAN.

Fixed cold start delays that could cause slow responses, especially first thing in the morning. The calculator now responds faster.

Calculation result emails now display correctly in Outlook desktop, with proper header styling.

Fixed an issue where billing periods spanning two charging years (e.g., March to April) would show a validation error even when all consumption data was entered correctly.

The "Generate Test MPAN" button now works reliably every time. Previously, random generation could intermittently fail with no feedback to the user. The generator now uses pre-validated meter configurations, and the warming system has been hardened to prevent cascading failures.

Fixed recognition of MPANs where LLFC codes appear without leading zeros on bills (e.g., "1" instead of "001"). The calculator now automatically pads these codes correctly when you paste 19-20 digit MPANs. Visual feedback shows when auto-padding has been applied.

A comprehensive knowledge hub covering everything from meter numbers (MPAN) to network charges (DUoS, TNUoS, BSUoS) to industry reforms (MHHS, TCR, CDCM). Essential reference for TPIs and energy professionals.

Instantly search all glossary terms from the Learn page. Press Cmd+K (Mac) or Ctrl+K (Windows/Linux) to open the search palette and find definitions in seconds.

Share links to specific terms using hash URLs (e.g., /learn#mpan or /learn#duos). Perfect for documentation, training materials, or answering client questions.

The MPAN decoder now correctly displays "SSC (Standard Settlement Configuration)" for MHHS-format MPANs, ensuring accurate terminology for energy professionals.

The calculator now clearly asks for all 21 or 22 digits from your electricity bill, with a help icon explaining where to find both rows of numbers in the "S" box. This prevents incomplete MPANs being entered (the 13-digit "Supply Number" alone is not enough to determine your tariff).

Fixed an issue with MPAN validation to ensure all valid meter numbers are correctly accepted.

MPANs with alphanumeric characters in the LLFC position (e.g., A01, P80, N35) are now correctly accepted.

Previously, charges you had deselected (like TNUoS or BSUoS) would still appear in your calculation results and email summaries. Now, only the charges you select are calculated and included in your results and emails.

The calculator now automatically hides input fields for charges you haven't selected. For example, if you deselect TNUoS, the "Triad Demand" field will no longer appear, creating a cleaner and more focused form.

Penalty charges when maximum demand exceeds your agreed capacity are now displayed in the DUoS breakdown, helping you identify unexpected capacity-related costs.

Charges for poor power factor are now displayed in the DUoS breakdown, giving you visibility into power quality penalties.

Removed the visual step indicator to create a cleaner, more focused experience that works better across all devices.

Tap FROM or TO dates on mobile to jump directly to the right calendar month - making it faster to select billing periods on your phone or tablet.