The average UK solar installer is still running the business the way they ran it in 2019: a spreadsheet for the pipeline, a design tool that doesn’t talk to the quote, and a WhatsApp group standing in for a CRM. That approach coped with 15 jobs a month. It doesn’t cope with 40, and it definitely doesn’t cope with the compliance load MCS, SEG and DNO applications now carry. With 257,397 MCS-certified installations completed in 2025 (up 32% year-on-year, taking cumulative UK deployment to roughly 21.6 GW), the installers who scaled that fast didn’t do it by hiring more admin staff — they did it by fixing the software stack underneath the sales process.
This is a trade-intelligence briefing, not a vendor advertorial: no installer software company sponsored this piece, and where a tool has a real limitation we say so.
What “solar installer software” actually means
The phrase covers four distinct jobs that a lot of installers still handle as separate, disconnected tools:
- Design and proposal — roof modelling, shading analysis, panel layout, yield estimate, and a client-facing PDF or web proposal.
- CRM and pipeline — lead capture, follow-up sequencing, quote-to-signed-contract tracking, and forecasting.
- Job and installation management — scheduling, stock/materials, install-day checklists, RAMS, and photo evidence for handover packs.
- Compliance and paperwork — MCS certificate generation, DNO (G98/G99) notification, Building Regs, and Smart Export Guarantee registration paperwork.
A handful of platforms (Open Solar, Aurora, HeatPunk-adjacent tools, Payaca, Tradify, JobLogic, Fergus) try to cover two or three of these in one product. Almost none cover all four well, which is the single biggest reason installers end up stitching two or three tools together with Zapier and a shared spreadsheet.
The design/quote layer: where most installers start
Design software is usually the first purchase, because it’s the most visible to the customer. Open Solar has become close to a default in the UK residential segment — free at entry level, satellite-based roof modelling, automatic shading analysis, and enough component libraries (panels, inverters, batteries) to generate a branded proposal in minutes rather than the half-day it used to take with manual PVsyst-style modelling. Aurora Solar is the heavier-duty US import, stronger on commercial and complex-roof modelling but priced and positioned for larger firms doing higher design volume.
The trade-off worth naming: design tools are good at yield estimates and bad at everything downstream. A beautiful proposal PDF that gets emailed and never followed up is a wasted lead. That’s the gap CRM software exists to close, and it’s also the gap that shows up hardest in the conversion numbers installers actually report — proposals sent versus contracts signed, not proposals sent versus enquiries received.
CRM: the layer that actually moves the needle on conversion
For a lean installer — one to eight crew, £1m–£5m turnover — the honest advice is: don’t buy a generic CRM (HubSpot, Pipedrive) built for SaaS sales cycles, and don’t build a bespoke Airtable base that only one person in the office understands. The trade-specific tools worth shortlisting are:
- Payaca — built specifically for UK trades including solar/renewables, with quoting, job scheduling and payment collection in one flow. Its strength is that it was designed around the “quote → job → invoice” cycle rather than adapted from a generic sales pipeline.
- Tradify and Fergus — broader trades platforms (electrical, plumbing, HVAC as well as solar) that cover job costing and scheduling well but need bolt-ons for solar-specific design output.
- JobLogic — stronger on the commercial/field-service side, useful if an installer is also running O&M contracts alongside new installs (a growing revenue line as the 2021–2023 installation boom starts needing its first inverter swaps and panel cleans).
The metric that should drive the buying decision isn’t feature count, it’s time-to-quote and lead response time. Every hour a hot enquiry sits unanswered measurably drops conversion — this is well established in general B2C sales literature and holds just as true for a homeowner who requested three quotes on the same afternoon. A CRM that auto-assigns and prompts follow-up within minutes will out-convert a superior design tool paired with a neglected inbox every time.
Installation and job management
This is the least glamorous layer and the most operationally important once an installer is running multiple crews. The job here is simple to describe and hard to do well: get the right stock to the right van, get RAMS and installer certification logged before anyone climbs a roof, and get photographic evidence of every fixing point, isolator and consumer unit change captured before the crew leaves site — because that photo evidence is what MCS audits and warranty claims will ask for later, sometimes years later.
Installers who skip this step properly are the ones who end up with a fire-drill when MCS calls back a sample of installs for an audit, or when a customer’s SEG application stalls because nobody can locate the commissioning certificate. Software that timestamps and geo-tags handover photos against the job record removes this risk almost entirely, and it’s a far cheaper insurance policy than the alternative — a director spending a weekend digging through old emails.
Compliance and paperwork: the layer nobody enjoys but everyone needs
MCS certification is not optional if SEG eligibility matters to the customer (and it almost always does — export payments, while supplier rates vary roughly in the 12–20p/kWh range at the top end, are a real ongoing return the customer will ask about). The paperwork chain — MCS certificate, DNO G98/G99 notification for the grid connection, Building Regs notification where required, and the SEG registration itself — is where a lot of installer time disappears into portal-hopping between systems that don’t talk to each other.
There isn’t yet a single UK platform that unifies all of this cleanly; most installers are still running MCS’s own portal, their DNO’s separate application system, and their CRM as three unconnected islands. That’s a genuine gap in the current UK solar-software market — whichever platform closes it first has a real commercial opportunity, and it’s a trend worth watching through 2026 as installer volumes keep climbing and the compliance overhead scales with them.
What a lean installer actually needs (not the sales-page version)
Strip away the feature lists and a one-to-eight-person installer genuinely needs four things from its software stack:
| Need | Why it matters | What to avoid |
|---|---|---|
| Fast, accurate design output | Customers are getting 2-3 quotes; slow proposals lose the job before price is even discussed | Overbuilt commercial-grade tools priced for volume you don’t have |
| Automated lead follow-up | Response speed is the single highest-leverage conversion factor | A CRM built for SaaS sales cycles, not trade quote-to-job flow |
| Job/stock visibility across crews | Prevents wasted site visits and missing-part delays | Paper job sheets once you’re past 2 crews |
| One clean audit trail per install | MCS audits and SEG/warranty queries need it retrievable in minutes | Photos scattered across personal phones with no job linkage |
Notably, none of this is about the size of the software budget — it’s about whether the four layers above are connected to each other. An installer running Open Solar for design, Payaca for CRM/jobs, and a disciplined photo-and-paperwork habit on every install is better equipped than one running an expensive all-in-one platform nobody on the team actually uses properly. Software adoption, not software spec sheet, is what separates the installers who scaled cleanly through 2025’s record year from the ones who scaled into an admin backlog.
The installers actually doing this well
It’s worth looking at how live UK installers structure this in practice rather than treating it as theory. ElectriFusion Solutions in South Yorkshire runs combined electrical and solar work through a single job-management pipeline, which is the model most lean multi-trade installers should be aiming for rather than running solar and electrical as separate back-office processes. In Scotland, Ecoaim has built its Livingston-based operation around a tight design-to-install cycle that keeps quote turnaround short — exactly the “time-to-quote” metric flagged above as the highest-leverage number in the whole stack.
On the compliance side, Greenlinc Renewables in Lincolnshire is a useful example of an MCS-certified installer where the certification and paperwork trail is treated as a core operational process rather than an afterthought bolted on after the crew leaves site. And for installers juggling solar alongside other renewable-heating workstreams, Carbon Legacy shows how a combined solar-and-heat-pump business needs its scheduling software to handle two very different install disciplines (and two very different grant/paperwork chains — Boiler Upgrade Scheme funding for the heat pump side is a separate process entirely from the solar PV compliance chain) through one system.
Where this connects to the commercial side
Everything above scales differently once an installer moves into commercial-scale work — a warehouse or factory roof isn’t a domestic design job with a bigger number attached, it’s a different design, finance and compliance process entirely. Installers expanding into that segment should treat the commercial solar installation process as its own discipline, with software that can handle multi-MWp design files, not just a scaled-up residential proposal template. The same applies to structures like solar car park canopies, where the engineering and planning paperwork alone can dwarf the panel-layout design work, and to sites financed through a power purchase agreement structure rather than a straight capital purchase — a financing model that changes what the CRM needs to track (contracted export volumes and counterparty terms, not just a one-off invoice).
The bottom line for 2026
The software decision that actually matters isn’t which design tool has the prettiest proposal PDF. It’s whether an installer’s design, CRM, job-management and compliance layers are connected enough that a lead becomes a signed job becomes a completed, audit-proof install without three different systems and a spreadsheet holding it together. With installation volumes at record highs and MCS audit scrutiny not going away, the installers investing in that connective layer now are the ones who’ll still be able to scale cleanly in 2027, when the 0% VAT relief on residential solar and battery storage is scheduled to lift back to 5% and margin discipline across the whole quote-to-install process starts mattering even more.
For installers benchmarking their own conversion numbers against the wider trade, our companion piece on UK solar industry data for 2026 has the fuller market picture behind the installation-volume figures referenced here.