By buyer
9 of the 100 products we researched name this buyer on their own site, across 2 categories. Consultancies and engineering practices producing drawings, calculations and stamped documents for other people’s projects.
This is a record of who each vendor says it sells to, not our judgement of who should buy what. It exists because the field separates products that otherwise look identical — one platform sells to utility programme administrators and another to the installers filing into those programmes.
Verified against the vendor’s own pages.
This page is not indexed
Only 9 products address this buyer, below our 12-product floor for indexing an audience page. It is published for readers who follow a link and excluded from search until the evidence base is deeper.
Usually needs
Defensible method, exportable detail and a stamp. Being able to show how a number was produced matters more than producing it quickly, and the output has to leave the tool in a format another engineer can check.
Usually doesn’t
Consumer-facing proposal design and CRM pipelines. The client is another business, and it is already sold.
Both boxes are our editorial framing of the buyer type, not a claim about any product. Every statement about a specific product on this page is read from the feature database.
Categories selling to engineering firms
Categories with nobody addressing them
No vendor in these categories names engineering firms as a buyer. That is a fact about their marketing, not proof the tools are unusable — but it is where a sales conversation will be hardest.
Alphabetical. Not a ranking — no product on this site is scored, because no verified reviews exist yet.
DNV
Design & simulation · Desktop
DNV's Windows desktop yield-assessment tool for utility-scale PV — irregular terrain, 3D shade, sub-module electrical mismatch, sub-hourly and multi-year simulation, in-app scripting, and cloud-burst calculation — built on DNV's own continual-validation methodology.
Energy Toolbase
Storage & microgrid · Web
A per-seat storage-and-solar economics and proposal tool whose real product is its utility-tariff, net-metering and incentive database, wrapped in a proposal generator.
Helios 3D (a product of STÖHR+SAUER CAD- und Computersystem GmbH)
German engineering software for utility-scale ground-mount PV that runs inside Autodesk Civil 3D — TIN-terrain-accurate rack and tracker placement, per-rack local grading, full electrical layout with cable and voltage-drop calculation, single-line diagrams, a yield estimate on Meteotest data, and a VR viewer — sold by quote only, with no price published in either English or German.
Aurora Solar Inc. (acquired Folsom Labs, 2019)
Design & simulation · Web
Cloud commercial-and-industrial PV design and simulation tool — rooftop, carport, ground mount and storage in one project — sold per seat, with a stated accuracy target relative to PVsyst and a PVsyst export on the top tier.
UL Solutions
The long-established hybrid-microgrid sizing and optimisation engine — simulate a year of operation at one-minute to one-hour resolution, search every equipment combination, and rank them by least cost.
Valentin Software GmbH
Design & simulation · Desktop
Windows desktop PV design and simulation package built around 3D shading — model the buildings, extrude them from a cadastral map, place up to 7,500 mounted modules, and get a yield forecast, a circuit diagram and a customer-facing report, for a published €845/year named-user licence.
PVsyst SA
Design & simulation · Desktop
The Windows desktop PV simulation package that most lenders treat as the reference yield model — grid-connected, stand-alone and pumping systems, 3D near-shading, hourly and sub-hourly, sold as a named annual licence in Swiss francs.
National Laboratory of the Rockies (NLR) — formerly the National Renewable Energy Laboratory (NREL)
Design & simulation · Desktop
The US national laboratory's free, open-source desktop techno-economic model — PV, CSP, wind, marine, geothermal, biomass, solar water heating and storage, each wired to a full project-finance model (PPA, partnership flip, leaseback, TPO, community solar, merchant plant).
Xendee Corporation
Storage & microgrid · Web
A modular microgrid and DER platform that co-optimises investment and operation with mixed-integer linear programming, sold as three separately priced seats — a proposal tool, a design tool, and a live controller.
The finder filters the full database on the requirements that actually exclude products — segment, scale, budget and the capabilities you cannot work without.
Answer five questions →9 of the 100 products we researched name engineering firms as a target buyer on their own sites, spread across 2 categories. 3 of the 9 with a readable pricing surface publish a price. Verified 28 September 2026.
The data does not answer that, and we will not pretend otherwise. What it shows is that these 9 products sit across 2 categories and that 17 of our 19 categories contain no product addressing this buyer at all — so the practical question is which of those categories your work actually touches.
3 of the 9 products addressing engineering firms whose pricing surface we could read publish a figure. 1 offer a free tier or a limited free allowance.
