Saved 1.2 s after your last edit.
The header reads Saved, Saving, Saved on this device or Save failed. Offline, the design keeps to this device and the three examples still open.
Roof to signature, in one studio.
Find the roof, lay out every face in 3-D, check it in an engineering workbench, model every hour of the year and send a proposal your customer signs online.
01Prospect
Find the roof worth your time.
Search an address, click a building or scan the street you are looking at. Outlines come from a global building-footprint layer.
Click, and the roof is yours
From street zoom every outline lights up as you hover. An address within 18 m picks its building, and split outlines merge into one roof.
No outline? Trace it
An imagery assist proposes the roof edge when it is at least 65 % sure, and shows the score. Otherwise draw it by hand, then square it up or snap it to the picture.
Scan the street
Area scan scores the largest outlines in view by roof size, kWp and yearly energy, ranks the top 50 and opens a design on the one you click.
02Design
Every face laid out, best first.
Pick the shape and the studio fills the roof inside the setbacks and around the obstacles you draw, best-facing face first, then builds it in 3-D as you go.
Five shapes, ground mounts too
Flat, mono-pitch, gable, hip or ground mount; the pitch reads Assumed until you set it. Ground mounts take fixed tables or a single-axis tracker to 90°, seven ground surfaces and a bifacial rear side.
Each face, its own yield
The faces list runs best first. At the default 26°, North carries 9 of 9 panels at about 1,737 kWh/kWp and West 11 of 22 at about 1,539. A face left empty says why.
Built in 3-D as you draw
Map, Split or 3-D. The stage builds the real roof kind, panels and rack rows on satellite ground and redraws on every edit.
Auto inverter · eight generic units
8.6 kWp needs 6.1 kW or more to keep DC:AC at or under 1.4. Auto takes 1 × 8 kW single-phase: DC:AC 1.07. Johannesburg house, example.
301 kWp needs 215 kW or more. No single unit is enough, so Auto takes 3 × 100 kW three-phase: DC:AC 1.00. Cikarang warehouse, example.
03System
Pick the kit, or start from a preset.
Good, Better and Best set the module, the DC:AC ratio and the battery in one click. Change any part and the preset reads Custom.
Generic, and labelled so
Eight modules from 410 to 660 Wp, three mono and five bifacial, each tagged not a datasheet. Change the model and every face refills.
Inverter on Auto
Auto takes the smallest unit that keeps DC:AC at or under 1.4 and adds units when one is not enough. Faces more than 10° apart never share an MPPT input.
A battery sized to your use
None, 5, 10 or 20 kWh, or your own size. After the energy run each size shows the share of your use it covers.
04Engineering workbench
Seven analyses, one key apart.
Open it from any step. Every analysis reads the design you drew, and Shading writes its loss back to the energy model in one click.
1–7analyses⌘/Ctrl Kpalette
05Energy and P90
The year, hour by hour, with its spread.
Every face runs through all 8,760 hours of a typical year built from the site's own weather record. The answer is a range: P50, P75, P90 and P99.
Exceedance curve · Johannesburg house · exampleHover the curve, or focus it and use the arrow keys
Estimate, then Simulated
The live card reads Estimate on every step until the hourly run finishes, then Simulated. Change the design and older numbers are flagged stale, with the cause named.
8,760 hours, 13 named losses
Sun position, sky model, far horizon, incidence, temperature, low light, inverter part-load and clipping, face by face. PR follows the IEC definition, and every hour exports as a CSV.
Open any energy figure
Each one opens to its weather record and years, the engine version, the loss sources and the uncertainty terms.
Johannesburg house · cash purchaseexample · ZAR a year
06Savings
The bill, before and after.
Pick a tariff preset or set your own rate, fixed fee, export credit and export mode, then enter a monthly bill or yearly kWh. The studio runs the bill with and without the system and prices it over 25 years. Add a loan for the monthly payment.
- IRR
- 18.6%
- 25-year net value
- ZAR 216,062
- Levelised cost
- ZAR 0.88/kWh
- Self-use
- 42.6%
Sign-off recordkept on the server
- Link tokenonline link
- Nametyped by the customer
- Emailtyped by the customer
- Timefrom the server
- Proposalstored copy, hashed
SHA-256over all five
- Signed
- time stamped
- Accepted with
- name · email · tick
- Second signature
- refused
07Proposal
A proposal your customer signs.
Add your name, colour and logo, check six A4 pages in a live preview, then send the link.
Six A4 pages
A cover with a 3-D render of the roof, the system with P50 and P90 per face, savings, investment, equipment and assumptions, next steps and acceptance. Five pages without the investment page.
An estimate, and it says so
Every proposal states that it is a design estimate, not a quotation, and prints a valid-until date.
A page made to sign
The link opens your header, the yearly saving, size, output, payback and self-use, the bill before and after, and the finance card. The customer signs with name, email and a tick.
08Platform
It saves itself.
Autosave
Projects
Every project in one drawer.
Search, rename, duplicate or delete. Each project carries its stage, Lead, Designed, Proposed or Signed, and Mark as sent moves it to Proposed.
Keyboard
The flow runs from the keys.
Enternext stepAlt ←backEscclose← →nudge 0.1 m[ ]rotate 1°?help
Full specificationEight groups
Prospect
- Address search
- 6 suggestions · arrow keys and Enter
- Street-before-number addresses
- 34countries
- Recent places, kept on this device
- 5
- Building outlines drawn from
- map zoom 16
- Address picks a building within
- 18m
- Imagery roof-edge assist
- 30, 70 or 160 m radius · shown at ≥ 65 %
- Imagery history
- latest or dated past captures, where available
- Area scan
- 300 largest outlines ≥ 80 m² in view, top 50 listed
- Area scan row
- m² · kWp · kWh/yr · score 0–100
- Example projects
- house, warehouse, barn · open offline
Design
- Roof shapes
- flat · mono-pitch · gable · hip · ground mount
- Pitch
- 0–60° · Assumed until set
- Default pitch
- ZA 26° · DE, GB 35° · US 30° · AU 22.5° · IN, ID, BR, PH, MY, TH, VN 15° · AE, SA 5° · else 25°
- Fill target
- max · N panels · N kWp · portrait, landscape or auto
- Setback rulesets
- 8: two US fire-code sets at 0.91 m, six at an assumed 0.30 m
- Obstacles
- drawn by you · 0.3 m clearance
- Outline editor
- move · rotate · corners · square up · snap · 50 undo steps
- Tracker
- single-axis, 10–90° (60° default), backtracking
- Table layouts · lowest edge
- 1P 2P 3P 1L 2L 3L 4L · 0.2–4 m
- Ground cover
- 0.05–0.98 (0.40 fixed, 0.33 tracker) or set the pitch
- Ground surfaces · boundary
- 7 presets, albedo 0.12–0.60, or custom · 0–20 m
- Bifacial rear side
- view-factor model · 10 % rear derate assumed
- Eave height, unless set
- 3 m · 6 m barn or over 400 m² · 8 m warehouse
System
- Modules
- 8 generic, 410–660 Wp · bifaciality 0.70–0.85
- Good
- 410 Wp · DC:AC 1.10 · no battery
- Better
- 430 Wp · DC:AC 1.20 · 5 kWh
- Best
- 460 Wp · DC:AC 1.30 · 10 kWh
- Inverters
- Auto, or 3 · 5 · 8 kW single-phase, 15 · 30 · 50 · 80 · 100 kW three-phase
- DC:AC
- 1.00–1.501.20 default
- Battery
- none · 5 · 10 · 20 kWh or custom · kW = kWh ÷ 2
- Loss defaults, editable
- soiling 2 · mismatch 2 · DC wiring 2 · connections 0.5 · LID 1.5 · nameplate 1 · availability 0.5 · near shading 0%
Workbench
- 3-D twin
- Iso · Top · South · day 1–365 · play 1× or 4× · snapshot PNG
- Shading run
- Fast 30 min, 5 rays a panel · Full 15 min, 9 rays
- Shading occluders
- walls, roof planes, drawn obstacles, racks
- Electrical checks
- Voc cold · Vmp hot · Isc × 1.25 · DC:AC 1.0–1.4
- Cables
- ≤ 1 % DC, ≤ 1.5 % AC drop
- Electrical outputs
- single-line diagram · bill of materials · inverter clipping compare
- Storage dispatch
- self-consumption · efficiency 90 %, depth 90 %, start 50 %
- Report
- cover, numbered contents, 20 sections · your name, logo PNG ≤ 300 KB
- Exports
- PDF · 8,760-hour CSV · project JSON · diagram SVG · 3-D stills ZIP
Energy
- Typical year
- 12 months from a 2005–2023 record, each anchored to its 19-year mean
- Weather
- satellite-derived where covered, reanalysis elsewhere
- Hourly chain
- sun position · anisotropic sky · 360-step far horizon · incidence · temperature · low light · inverter
- Loss stages · PR
- 13 named · IEC definition
- P90
- P50 × (1 − 1.2816 σ)
- σ terms
- resource 4 % satellite or 8 % reanalysis · year-to-year from the site · model 3 % · geometry 1 % · degradation 0.2 %
- σ in the examples
- house 5.85 % · warehouse 9.6 % · barn 6.7 %
- CSV columns
- hour · utc · pv_ac_kw · load_kw · grid_import_kw · grid_export_kw · soc
Savings
- Tariff presets, assumed and editable
- ZA · DE · ID · US · GB · AU
- Export modes
- net metering · net billing · zero export
- Use
- monthly bill or yearly kWh · Home, Business or Flat profile
- Price per W, editable
- USD 1.10 · EUR 1.30 · GBP 1.20 · AUD 1.40 · ZAR 15 · IDR 10,000
- Battery per kWh, editable
- USD 700 · EUR 750 · GBP 600 · AUD 1,100 · ZAR 12,000 · IDR 11 M
- Opex
- 1 %editable
- Escalation · discount · degradation
- 3 % · 6 % · 0.5 % a year, over 25 years
- Loan
- 8 %, 10 years, 20 % deposit → monthly payment
- Assumed-use banner
- shown until you enter a bill or yearly kWh
Proposal
- 6 A4 pages · 5 without investment
- Cover render
- 3-D, March equinox 10:00 solar · or a 2-D site plan
- Your brand
- company · colour · logo PNG, JPEG or SVG ≤ 300 KB
- Online link
- signable
- Offline snapshot
- ≤ 4 MB · logo kept if ≤ 30 KB · read only
- Sign-off hash
- SHA-256 over token, name, email, time and the stored proposal
- Mark as sent
- stage → Proposed
Platform
- Autosave
- 1.2 s after the last edit · this device when offline
- Projects drawer
- search · rename · duplicate · delete
- Stages
- Lead · Designed · Proposed · Signed
- Studio keys
- Enter · Alt ← · Esc
- Workbench keys
- 1–7 · ⌘/Ctrl K · ? · Space
- Outline keys
- arrows 0.1 m · Shift 1 m · [ ] 1° · Shift-rotate 15°
Limits, stated once. Area scan ranks by roof size: one estimate on the largest roof, scaled by area, and the panel says Indicative only. Setbacks apply the largest edge value on every edge, and the US pathway is not drawn. Shading leaves out trees, neighbours and diffuse blocking. Cable runs are assumed at 30 m DC and 10 m AC, and the design-low temperature is an estimate you can override. Storage efficiency, depth and starting charge are fixed. The full list is on Science, Limits
Request access
Bring us your next roof.
Request access for your team, or book a demo and watch one design go from map to signature.
