Solar prospecting and design

Any roof on Earth, scored.

HelioAtlas finds the roofs worth your time, designs them in 3-D, models every hour of the year and turns the result into a proposal your customer signs online.

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8,760 hours per designP50 + P90 on every energy figure6 country presets

01Locate

From orbit to one roof.

Search an address or click a building. Outlines come from a global footprint layer, and the map lands at street level ready to design.

02Survey

A valley, read roof by roof.

Scan the view and up to 300 of the largest outlines, from 80 m² up, become candidates. Packhouses, cellars, barns and homesteads, each with its own roof size, kWp and yearly energy.

03Score

Scored before you drive out.

A first-pass yield on the largest roof sets the scale, and every other roof is scored from its area. The biggest earners light up.

04Rank

The top fifty, ranked.

Biggest yield first. Click a row and the design starts on that roof.

05Design

Open it in 3-D.

Roof faces, setbacks and obstacles. Panels fill the best face first, strings are checked against the inverter, and every hour of the year is modelled.

06Close

Prove it. Price it. Sign it.

P50 and P90 energy, the bill before and after, payback and IRR. Then a branded six-page proposal and a link the customer signs.

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Example site · Western Cape, South Africa33.47° S · 19.63° E · orbit

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01Watch the studio

An address in, a proposal out.

One session in the studio, start to finish: find the roof, lay out the panels, pick the kit, model the year, price it and build the proposal.

Studio · a live session: an address search, one house roof picked on the map and designed from scratch with the studio defaults, through to the proposal previewRecorded in the product · a new design, not one of the examples · played at 1.18× with three loading waits cut · muted

02Six steps

One guided flow for every roof.

Six steps on a full-screen satellite map. The same flow designs an 8.6 kWp house and a 301 kWp warehouse.

HelioAtlas studio start screen: an address search over a satellite world map, with the three example projects below it — **Step 1 · Locate** · search an address, or open one of the three example projectsStudio start screen

Behind the six steps sits the engineering workbench: 3-D twin, shading, sun path, electrical, energy, storage and report.See the workbench

03Three examples

Three real designs. Their real outputs.

Every account opens with these projects, and they run offline. The figures are the studio's own, unedited; tariffs and prices are country presets, marked assumed.

Johannesburg house

Hip roof · 26°

South Africa · satellite-derived weather

Energy · P5014,004kWh a year

Payback5.7years

System: 8.6 kWp20 × 430 Wp
Energy · P90: 12,954kWh/yr
Specific yield · PR: 1,628kWh/kWp · 78.0 %
Yearly bill, before → after: ZAR 39,740 → 17,088
IRR: 18.6 %
25-year net value: ZAR 216,062

04P50 and P90

The typical year, and the bad one.

P50 is the typical year. P90 is the year the system beats nine times in ten. The spread comes from the site's own weather record and stated model terms, so a lender sees both.

Yearly energy · Johannesburg house, exampleP50 14,004 · P90 12,954 kWh a year

Modelled spread of yearly energy: a normal distribution around P50 14,004 kWh with sigma 5.85 percent. P90 is 12,954 kWh; nine years in ten reach it.

σ 5.85 %P90 = P50 × (1 − 1.2816 σ)Shaded: the years that reach P90Hover, tap or use ← → to read any year

Weather resource: 4 %satellite-derived
Year to year: measuredsite record
Model: 3 %
Geometry: 1 %
Degradation: 0.2 %
Combined, σ: 5.85 %

Terms combine as a root sum of squares; reanalysis sites carry 8 % for the resource. Payback and savings are worked from P50.

How P90 is built

05Proposal

Six pages, signed online.

Your logo and colour on an A4 proposal built from the design. Each one carries a valid-until date and says it is a design estimate, not a quotation.

The customer signs with: name, email, tick
The server stamps: time, SHA-256
A second signature: refused

Proposal page 1 of 6, the cover: a 3-D render of the roof, R22,652 estimated annual savings, 8.6 kWp, 14,004 kWh a year, pays for itself in 5.7 years, and the date the estimate is valid until — **Page 1** · Cover: 3-D render, R22,652 saved a year, 8.6 kWp, 14,004 kWh, 5.7 yr payback

Proposal page 2 of 6, your solar system: roof plan with 20 panels on two faces, a table of the west and north slopes with their panels and energy, P50 14,004 kWh, P90 12,954 kWh, 1,628 kWh per kWp, performance ratio 78.0 percent, and energy month by month — **Page 2** · Your solar system: roof plan, each face's panels and energy, P50 14,004 and P90 12,954 kWh

Proposal page 3 of 6, your savings: the yearly bill R39,740 without solar and R17,088 with it, monthly bills before and after, and 42.6 percent of the solar used on site — **Page 3** · Your savings: R39,740 → R17,088 a year, monthly bills, 42.6 % self-use

Proposal page 4 of 6, your investment: system cost R129,000, pays for itself in 5.7 years, IRR 18.6 percent, net gain over 25 years R216,062, the cumulative cash position and the assumptions behind it — **Page 4** · Your investment: R129,000, 5.7 yr, IRR 18.6 %, cumulative cash; a page you can leave out

Proposal page 5 of 6, equipment and assumptions: the generic 430 Wp panel, an 8 kW inverter at DC:AC 1.07, the loss assumptions and where the main numbers come from — **Page 5** · Equipment and assumptions: generic 430 Wp, 8 kW at DC:AC 1.07, the loss table; no battery, as the house has none

Proposal page 6 of 6, next steps and acceptance: the proposal summary, how the numbers were worked out, and terms stating a design estimate, not a quotation, with its valid-until date — **Page 6** · Next steps and acceptance: summary, method, terms

Request access

Find the next roof worth your time.

Request access to the studio, or book a demo and watch the full flow run on the three example projects.