Solar design & simulation · Storage design
26 of the 100 products we researched carry this capability, 24 of them at the depth we code as advanced. For 6 more we searched the vendor’s own pages and found no statement either way.
Sizing a battery against a site’s load profile and tariff, then simulating how it would actually behave across a year — state of charge, cycling, self-consumption and what the grid still supplies.
Verified against the vendor’s own pages.
Storage attach rates decide the size of a residential proposal, and a battery sized by rule of thumb is the fastest way to lose the job at the kitchen table or to under-deliver after install. It is also the capability most likely to be listed on a feature page and turn out to be a dropdown rather than a simulation.
12 of the 26 products that carry it publish a price you can check before contacting sales.
Every phrase below appeared on a vendor’s own site during research and was mapped onto the
single canonical capability Battery sizing and modelling. The count is how many products used
that exact wording — which is why searching for any one of them finds only a fraction of
the market.
Depth is coded per capability, not on a universal scale, so “advanced” means something specific to this one feature and nothing at all across features.
Basic
The tool lets you attach a battery and returns a size or a headline self-consumption figure, without an hour-by-hour simulation behind it.
Advanced
The tool simulates dispatch over a full year against a real load profile and tariff, and the output changes when you change the tariff.
Not a ranking — no product on this site is scored. Ordered by the depth we could verify, then alphabetically.
Trace Software International
A French PV design and simulation suite sold in four capacity-banded tiers — free up to 9 kWp, then €990 / €1,490 / €1,990 per year excluding tax — with Meteonorm weather data, 3D modelling, SketchUp and Revit plugins, DXF/KML/GeoJSON export and a direct handoff into the vendor's electrical-calculation products.
Arka360
Design & simulation · Web
A 3D solar design, proposal and lead-management platform, originally Indian and now selling into the US with an attached permit-plan-set and PE-stamp service arm.
Aurora Solar Inc.
Design & simulation · Web
Cloud residential solar design-and-sales platform that turns satellite/LIDAR imagery into a 3D roof model, a shaded production estimate and a signable proposal in one session.
Enact Systems Inc.
Design & simulation · Web
A design-through-monitoring solar platform that, since acquiring PVComplete in January 2026, sells its own web design and proposal tool alongside PVComplete's AutoCAD-based engineering product and an asset-management/fleet-monitoring layer.
Enerflo
Dealer & sales-org · Web
An integration and deal-flow layer for US residential solar that connects the CRM, design tool, lender and contracting steps a sales org already uses, from first knock to Permission to Operate.
FIMER
An inverter-manufacturer sizing and simulation tool — PHotovoltaic Array Sizing Tool — launched in 2026 and delivered inside FIMER's existing Aurora Vision® account, covering PV array configuration, storage sizing and a downloadable technical report.
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.
Huawei FusionSolar (Huawei Digital Power)
Design & simulation · Web
An inverter manufacturer's free-to-partners web design tool: pick a site from satellite view, let it auto-arrange modules and auto-generate the electrical design, compare storage options, and export a 3D report — all inside the Huawei FusionSolar ecosystem.
KACO new energy GmbH
Design & simulation · Web
A free, no-login, browser-based PV sizing and yield tool that KACO new energy (a Siemens company) puts its brand on, and that Valentin Software builds and hosts — the same company behind PV*SOL.
Terabase Energy
Cloud, physics-based energy-yield modelling for utility-scale PV — sub-hourly resolution, full 3D ray-traced shade on cloud GPUs, an open REST API and Python SDK, with a published per-user price and an unusually detailed public record of independent engineering reviews.
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.
European Commission, Joint Research Centre (JRC)
Design & simulation · Web
The European Commission's free web tool and API for solar radiation and PV performance anywhere on Earth — grid-connected, tracking and off-grid performance, monthly, daily and hourly radiation, and a downloadable TMY — with no account, no key and no usage restriction.
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.
Pylon
Proposals & sales · Web
An Australian solar and battery design and proposal tool sold per project on prepaid credits rather than per seat, with an optional per-user CRM bolted alongside it.
RatedPower (part of Enverus)
Design & simulation · Web
Cloud platform for utility-scale PV, storage and hybrid plants — automated layout and basic engineering all the way to the grid connection point, with substation design, 3D energy yield, CAD deliverables and a PVsyst export, sold on three quote-only tiers.
Reslink Technologies Private Limited
Design & simulation · Web
A mobile-first 3D solar design and proposal platform for Indian EPCs that claims to take a rooftop from satellite imagery to a bill of materials and a signed-ready proposal without a site visit.
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).
SMA Solar Technology AG
Design & simulation · Web
A German inverter manufacturer's PV planning tool, free in two tiers and €600/year for a third, covering on-grid and off-grid design, 3D visual roof planning with shading analysis, profitability, and quotation output.
Solar Analytics Pty Ltd
Monitoring & asset mgmt · Web
An Australian consumer-facing solar performance and savings monitor that models what a system *should* be producing from its own specifications and local weather, then flags the gap — sold by subscription per inverter, or free if you install the group's own CATCH Control hardware.
SolarEdge Technologies
Design & simulation · Web
SolarEdge's free browser-based PV design and proposal tool — HD imagery, AI-assisted 3D roof modelling, automatic panel placement, automatic stringing and DC cabling, and a customer proposal with financial analysis — with no licence or subscription fee.
Enphase Energy (acquired Sofdesk, Jan 2021)
A cloud-based solar design and proposal platform owned and sold by Enphase Energy, the microinverter manufacturer.
Glytrix
CRM & lead management · Web
An Australian solar CRM with design, proposals and invoicing built in, metered on a monthly token allowance rather than on seats or projects.
SurgePV Technologies Ltd
Publisher’s own product — never ranked
Design & simulation · Web
A browser-based solar design, shading, yield, electrical and proposal platform sold per seat on an annual subscription, aimed at installers and EPCs who want one tool instead of a CAD package plus a simulation engine plus a spreadsheet.
6 products make no statement either way
We searched these vendors’ own pages and found neither a claim nor a denial. That is recorded as “not found”, which is different from “not offered” — the capability may well exist and simply not be documented. We never convert silence into a no.
Categories these products sit in
Capabilities bought alongside it
Terms worth knowing
26 of the 100 products we researched carry battery sizing and modelling, 24 of them at the depth we code as advanced. Verified against vendor pages on 28 September 2026.
Sizing a battery against a site’s load profile and tariff, then simulating how it would actually behave across a year — state of charge, cycling, self-consumption and what the grid still supplies.
Vendors name it 9 different ways on their own sites, including “Storage modelling”, “Battery / storage sizing”, “Battery / ESS design”, “Battery attach and sizing”. We normalise all of them onto one canonical capability so they can be compared.
