Free tools for installers

Seven that do the work for you, and guides for the rest. No charge, no form.

Practical things installers actually use on a job: what a DNO application needs, what belongs in a quote, what to capture on a survey. Search below.

14 tools

CheckerVAT Reverse Charge CheckerFive questions decide whether you charge the VAT on a construction invoice or your customer accounts for it, with the invoice wording to use.Open →CalculatorCIS CalculatorWork out the CIS deduction on a subcontractor invoice with materials, plant, fuel and VAT excluded, and see what a flat percentage would have got wrong.Open →CheckerPart P Notifiable Work CheckerFour questions and it tells you whether a domestic job is notifiable to building control in England, which certificate it needs, and how to sign it off.Open →CalculatorMaximum Demand CalculatorAssess maximum demand with diversity applied, add an EV charger or heat pump, and see what the main fuse has left. Every allowance is editable.Open →CalculatorMCS 020 Heat Pump Noise CalculatorCheck whether a heat pump outdoor unit passes the MCS 020 (a) permitted-development noise limit at the neighbour's window, with the working shown and a printable sheet.Open →CalculatorHeat Pump Running Cost CalculatorCompare a year of heating on a heat pump against a gas, oil or LPG boiler at the current energy price cap. SCOP, efficiency and tariffs all editable.Open →CheckerBoiler Upgrade Scheme Eligibility CheckerA few questions show the likely Boiler Upgrade Scheme grant for a heat pump in England and Wales, with a link to gov.uk to apply. Indicative only.Open →CheckerG98 or G99 CheckerThree questions and it tells you whether an install needs a G98 notification or a full G99 application, with the amps-per-phase arithmetic shown.Open →CalculatorJob Management ROI CalculatorWork out revenue per field operative, what admin is costing you a year, and whether job management software actually pays for itself. Every assumption is yours to set.Open →CalculatorJob Costing CalculatorWork out what a job actually costs before you quote it: labour, materials, travel and overhead, so the margin is a decision rather than a surprise.Open →HandbookRunning a Multi-Trade Installation TeamA practical handbook for installers adding EV, solar, battery or heat pumps alongside an existing trade: scheduling, competency, compliance and cash flow.Open →GuideDNO Application ChecklistEverything a G98 notification needs before you submit it, so applications stop bouncing on details that have nothing to do with the installation. UK only.Open →GuideEV Charger Installation Quote TemplateWhat belongs in an EV charge point quotation, line by line, so the customer can compare it fairly and you are not absorbing the extras.Open →GuideSolar PV Survey ChecklistWhat to capture on a solar PV site survey so the design, the quote and the install all work from the same set of facts.Open →

Nothing matches that yet.Try a broader word such as “solar”, “quote” or “checklist”. We are adding tools regularly.

Questions

About these tools

Are these really free?+

Yes. The calculators and checklists on this page are free to use and most need no sign-up at all. Where a resource is a longer guide we ask for an email address so we can send it to you, and we say so before you start.

Do I need an installHUB account?+

No. These are built to be useful whether or not you use our software. If you do use installHUB, several of them mirror what the platform already does for you automatically.

Can I use these with my own customers?+

Yes. Use them, adapt them and put your own name on the output. They exist to make quoting and surveying less painful, not to advertise at your customers.

Do the checklists cover territories outside the UK?+

The DNO application checklist is UK-specific, because ENA Connect Direct and the G98 process are UK arrangements. The quoting and survey material applies anywhere.

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