Frequently asked questions

UK renewable electrical connections are governed by definitive legal documentation — around 700 pages of complex technical specification (ENA EREC G98, G99 and G100, the EVCP & HP Connections Form and the Standard Application Form). CLRD ensures complete compliance with it, while giving you the most efficient, friendly interface to comply confidently — from full-lifecycle data intake to automated DNO submission.

Purpose-built for accurate, convenient entry:

• enter once, reuse everywhere — name, site, MPAN, DNO details and system/installation specifics (including the SLD) are entered once and reused across every form and document, so you never type the same thing twice — a new job at a site you've worked before even pre-fills from its history;
• instant validation on every input, with on-the-spot feedback, so bad data never enters the system;
• all ~10,500 ENA-registered devices — the Fully Type Tested inverter register plus the charge-point and heat-pump registers — in a fast search list, filtered by phase, brand and capacity;
• a custom visual PV-string-to-inverter wiring control instead of a stack of drop-down menus;
• a quick, easy signature component for both installer and client.

Yes — routing is always-correct and instant, in accordance with the regulatory documentation, with full auditability. You don’t decide which forms apply; CLRD does, deterministically. The full catalogue, by procedure:

• Cover Letter
• LOA (Letter of Authority)
• Boundary Site Map
• SLD (Single Line Diagram)
• Device Schedule (on form overflow)
• G98 Single Premise — Form B
• G98 Multi-Premise (Close Geographic Region batch) — Form A
• G99 SGI-1 — Form A3-3
• G99 SGI-2 / SGI-3 — Forms A1-2 and A3-2
• G99 Gen Type A (<50kW) — Forms A1-1 and A3-1
• G100 — Forms A & C
• EVCP & HP Connections Form (EV/HP)
• Decommissioning — G98 Form D / G99 Form D1

CLRD produces the complete documents and submits them automatically to all DNOs and nearly all IDNOs — both pre-install applications and post-install notifications, with commissioning forms and documentation.

Every job moves through a fixed sequence of states — each step is validated, nothing can be skipped, and the full history is kept on the job:

• Create & lock — enter the installation in the wizard; on confirmation the inputs are locked, validated and routed to the right forms.
• Pre-install application (routes that need one: G98 multi-premises, G99 SGI-2/SGI-3, General Type A) — the application pack is generated, submitted to the DNO, and the decision (and any questions) is tracked on the job’s own message thread. Notify-only routes (G98 single premises, SGI-1) skip straight to installation.
• Install & commission — record the actual installation date and confirm commissioning (signed by whoever commissioned the install).
• Post-install notification — the commissioning pack is generated and submitted; the job is complete.

If validation fails, the job is blocked with the exact corrective action shown — and a DNO rejection or cancellation is recorded as its own terminal state, ready to duplicate into a corrected resubmission.

Complete DNO paperwork, filled out for you — ready to review, then submitted automatically:

• a DNO Cover Letter — a one-page transmittal so the covering context stays with the pack inside the DNO’s case system;
• complete, fully filled-out G98 / G99 / G100 forms — the right pre-install application and/or post-install notification for the job, routed automatically, including the decommissioning confirmation (G98 Form D / G99 Form D1) whenever the job takes equipment off the wall, whether that’s a straight removal or a replacement;
• the ENA EVCP & HP Connections Form whenever the job includes an EV charge point, V2G charger or heat pump;
• a Device Schedule whenever a device list outgrows a form’s printed table — a complete, styled list of every device with its register references and capacities, which the form then refers to;
• a generated single line diagram (SLD) — configurable, and regenerated for minor install-time changes;
• a Site Boundary Map — the property with its boundary outlined and the electricity meter pinned;
• a Letter of Authority (LOA) for the customer to sign;
• commissioning forms and supporting documentation.

Domestic and small-commercial PV solar (with or without attached storage), battery-only installations, and — with or without generation on site — EV charge points, V2G chargers and heat pumps.

Yes — first-class support. EV charge points and heat pumps are picked from the imported ENA charge-point and heat-pump registers, and any job that includes one produces the official ENA EVCP & HP Connections Form alongside (or, for load-only jobs, instead of) the G98/G99 forms — deciding connect-and-notify versus apply-before-install by the form’s own criteria.

A V2G charger is handled as electricity storage on the generation side, routing on its export capacity like any battery.

The Premises Maximum Demand asked for in Supply Details is the highest current the whole property draws at once including the new equipment — count battery and V2G charging too (they draw from the grid), and don’t deduct an import/load-limiting device (declare the scheme instead, and CLRD states the limited figure wherever a form wants it). The ENA EVCP & HP Connections Form weighs it against the cut-out fuse rating — and, for an EV charge point with no load limiter, against 60 A per phase — to decide connect-and-notify versus apply-before-install. There are three accepted ways to assess it:

• Calculate it (the load survey) — itemise the property’s circuits and apply the diversity allowances from the IET On-Site Guide (the BS 7671 companion): for example a cooker counts its first 10 A plus 30% of the remainder, and ring finals, water heaters and immersion heaters each carry their own factor. Add the proposed EV charge point or heat pump at full rating, with no diversity — they are long-duration loads. This is the defensible route when there’s no measurement history: a new build, a new occupant, or loads about to change.
• Measure it — a smart meter’s half-hourly history gives the real existing maximum demand (the highest half-hour’s kWh × 2 = kW; divide by 0.23 for amps on a 230 V single phase). Some older meters carry a maximum-demand indicator, or the supply can be clamp-logged over a representative period. Then add the new equipment at full rating on top.
• From supply records — supplier half-hourly data or in-home display history, the same basis as reading the meter.

In practice installers mix them: measure the existing baseline where a smart meter exists, calculate where it doesn’t, and always add the proposed equipment at rating. Enter the result in amps — or, on a CT-metered premises, in kVA totalled across the phases.

For the full method — the diversity allowances, the smart-meter arithmetic and a worked example — see the step-by-step guide: How to do a load survey.

Full document lifecycle for:

• G98 single premises — post-install Form B notification (connect-and-notify; no pre-install application needed).
• G98 multi-premises (Close Geographic Region) — a shared pre-install Form A application pack for the batch + a post-install Form B per premises.
• G99 SGI-1 — post-install A3-3 notification (install-then-notify; no pre-install application).
• G99 SGI-2 and SGI-3 — pre-install A1-2 application pack + post-install A3-2 notification pack.
• G99 General Type A within the small-application scope (under 50 kW three-phase / 17 kW single-phase) — pre-install A1-1 application pack + post-install A3-1 notification pack.

Yes. Mark an existing device Will be decommissioned by this Job and CLRD assesses the installation as it will stand after the works, records the removal on the relevant forms and includes the official decommissioning confirmation — G98 Form D or G99 Form D1 — in the pack, together with the updated single line diagram.

Both mixed jobs (old equipment out, new equipment in — a replacement) and decommissioning-only jobs (removal with nothing new installed) are supported.

The DNO never requires approval before decommissioning — but it does require notification of the decommissioning within 28 days, and CLRD produces and submits exactly that.

Yes. A batch job takes one client and an identical system across several sites and creates a job per premises. Where those premises route G98 and form a Close Geographic Region, CLRD produces the shared pre-install G98 Form A covering every premises, submits it to the DNO from the batch’s own contact address, and holds each premises’ installation until that one application is approved. Each premises then carries its own post-install Form B.

CLRD decides whether Form A is required from the postcodes: premises sharing a postcode sector are a Close Geographic Region and Form A is mandatory. Where they don’t share one, you confirm whether another CGR condition applies (a single LV feeder, within 500 m, or DNO-confirmed) — if none does, the premises are notified separately with Form B instead. Beyond the form’s ten printed rows the pack adds a Premises Schedule listing every premises.

No.

• 50 kW to 1 MW (over 50 kW three-phase, or over 17 kW single-phase) is still Type A, but above the A1-1 scope it requires the DNO’s full Standard Application Form, which CLRD doesn’t generate — so it’s not supported.
• Over 1 MW is Type B, well outside CLRD’s domestic / small-commercial domain — also not supported.

Yes — both. Export and import limitation schemes get full-lifecycle G100 support: the official Form A application and Form C commissioning enclosure, for inverter-integrated schemes or stand-alone ENA-registered limiter devices, carried across the forms and the SLD.

All ~7,000 ENA-registered Fully Type Tested single- and three-phase inverters. Single-phase inverters on a single-phase supply; on a three-phase supply, single- and three-phase devices mix freely, with generation and demand totalled per line.

Bespoke / non-FTT inverters aren’t supported.

Up to 15 devices per installation — up to 5 proposed (new) and up to 10 existing on site, mixing solar inverters, batteries, V2G chargers and EV charge-point / heat-pump load devices (load devices don’t count against the generation limits). Where a device list outgrows an ENA form’s printed table, the pack automatically includes a Device Schedule with the complete list.

CLRD generates a configurable SLD and can regenerate it for minor install-time changes (panel configuration, isolators). It handles imbalanced inverters and string arrangements, and you can optionally upload your own SLD instead.

Document packs include a Letter of Authority and collect the customer’s signature whichever way suits — signed in-app on your device, uploaded as an image, or by sending the customer an email or shareable link (e.g. by WhatsApp) so they can sign it themselves. The installer signature is captured in-app or by upload.

The post-install commissioning declaration is signed by whoever actually commissioned the installation — you, a teammate sent their own signing link, or an external commissioner signing under their own company and role.

CLRD supports installer and non-installer commissioning — including 2nd-party team members and 3rd-party external commissioners. Whoever commissioned the installation is recorded and signs the commissioning declaration: record yourself, send a teammate their own signing link, or send an external / subcontracted commissioner a link to sign under their own company and role. Each declaration prints that commissioner’s name, role and company, and a Commissioning Requests inbox keeps a designated engineer from missing a request.

Yes — the CLRD API (v1; the Volume Operations and Enterprise plans) lets your CRM or own tooling manage clients, sites and full-lifecycle compliance jobs, upload and download document packs, read and reply to the DNO message thread, and receive signed webhooks as jobs progress. Records created through the API live in CLRD just like ones created in the app — the full lifecycle on every record, not a one-shot “data in, PDF out” call.

The API is for your own company’s benefit — your team, and people building on your behalf, through your own software or third-party tools connected to your account. Reselling API access, or building CLRD into a commercial software product sold to its own customers, requires our prior approval — get in touch about a partner agreement before you integrate.

See the API documentation for the full reference.

Yes — every CLRD account includes CSV import and export, no API or plan requirement. Bring your client and site book in from any spreadsheet or CRM export (each row is validated like the normal forms, and skipped rows are reported by line number), and export it back out any time as plain CSV files that round-trip through import — your data is never locked in. The Jobs page adds a reporting export: one row per job with its status, G98/G99 routing, client and site, and system totals.

See the CSV documentation for the format and column reference.