Helios: Every roof has a sun score. We show it.

No honest answer for owners.

Rooftops could deliver ~148 TWh a year. In Istanbul alone, 11.4 TWh sits unused. And since January, shared meters above 4,000 kWh/yr pay full price.

70 Mt

CO₂ / year avoidable

The annual CO₂ cut from Türkiye's rooftops.

11.4 TWh

unused in Istanbul

Rooftop power nobody is counting.

+75–99%

bill shock since 2026

What owners now pay on shared meters.

57% of power is still fossil.

Solar is just 10.5%. Drought cut hydro and gas filled the gap, at ~$1.8 bn/yr in extra imports (Ember). Yet rooftops alone could cover ~45% of demand. That's the gap Helios closes: every roof we turn on replaces imported fuel with sun already landing here.

Coal34%

Gas23%

Hydro16%

Wind11%

Solar10.5%

Other5%

57%

still fossil

Coal 34% + gas 23%. ⅔ of that coal is imported, at ~$1.8 bn/yr in extra imports.

43%

clean

Hydro 16% · wind 11% · solar 10.5% · other 5%. Drought is the wild card here.

45%

could come from rooftops

Rooftop solar alone could cover ~45% of Türkiye's demand. That is the gap we close.

Sources: Ember, Türkiye Electricity Review 2026; Ministry of Energy (ETKB), 2025 totals. "Other" = geothermal, biomass.

A free sun map in one minute.

Drop a pin on your building. A minute later you see it in 3D, painted by how much sun each part of the roof gets. Below it: one page with cost, payback and savings per flat, ready for the building meeting. We grade open land too.

1

Drop a pin or snap a photo

Address, pin, or a quick photo. No account, no phone number, no sales call.

2

See your 3D sun map

Yellow where panels pay off. Purple where the tree and the building next door shade it after 15:00.

3

Get one report

Cost, payback, savings per flat. Ready for the building meeting. Sometimes the honest answer is no panels, and we say that too.

Try the free scan →

Then, on appointment: drone survey for an exact, installer-ready design.

Every install feeds the next.

A loop, not a funnel. Real output from installed systems makes the next sun map more accurate, and a building that saves money brings in its neighbours.

01

Free sun map

Drop a pin, get the answer.

02

Building votes

Manager → owners' assembly.

03

Drone survey

Exact, installer-ready design.

04

Marketplace quotes

Vetted installers quote against our number.

05

Install & track

Real output feeds back.

Three people decide: building manager → owners' assembly → grid company. They buy around January assemblies, after a bill shock, or when roof repairs are already planned.

Automatic and neutral in Türkiye.

We checked 11 tools (Oct 2026). Every Turkish one is installer-owned and makes the owner draw the roof by hand, and it ends in a sales quote. Google Sunroof doesn't cover Türkiye. None gives per-flat numbers. We don't compete with installers; we feed them.

Tool

Automatic (address/photo)

Neutral (no seller)

Per-flat savings

Helios

✓

Google Sunroof

✓

No (not in TR)

Google Solar API (B2B)

✓

sells data

No

ElseRoof / Solway / Solmeksan

draw by hand

seller-owned

No

SolarSim / Solimpeks

draw by hand

seller-owned

No

PVGIS

expert inputs

✓

No

GESHesapla

type numbers

not verified

No

Istanbul first, then the world.

282 GW of rooftop-scale solar went up worldwide in 2025 alone (41% of all new solar). Every system started with someone asking whether their roof is worth it.

282 GW

Global · 2025

Rooftop-scale solar built worldwide in 2025.

120 GW

TAM · Türkiye

Türkiye's rooftop potential.

348 K

SAM · Istanbul

Post-2000 buildings: young enough for 25-yr system, big enough to share a roof.

1,000

SOM · 2 yr

Buildings mapped in 2 years (team target).

Persona · Mehmet, 52, landowner, Konya

Wants income from idle land. Pain: rising pump & power bills. Fear: quotes he can't check. Needs: one neutral page showing a sun map of his land and his roofs.

Run the loop at growing scale.

One street in Istanbul to three country packs in 24 months.

Now–Dec 2026

01

Validate

Interview 5 managers · test vs. real roofs · free-scan demo live.

H1 2027

02

Pilot

Public beta · 20 buildings · first installer partners.

H2 2027

03

Türkiye

Installer marketplace · drone surveys · site managers, cities.

2028 →

04

Global

One engine, new country packs · first 2–3 countries.

Owners free, installers pay.

Owners never pay for the sun map. The estimate is shown before any installer, and every installer pays the same commission, so we never tilt the answer.

Free

Sun map · for every owner

The free first scan is how we bring owners in.

₺ 5,000

Report · per building

Cost, payback and savings per flat, ready for the meeting.

2%

Commission · per install

Via our marketplace. Less than the site visits installers waste today.

₺ 780,000

Dashboards · per year

For cities and campuses, across many buildings.

Drone

Survey · booked after a yes vote

Flies a loop over the roof, measures it precisely.

₺ 499.99

Per building / month plan

~₺ 401 per building after costs · break-even at 110 paying buildings (0.2% of Istanbul).

M. Shayan Usman

Founder

Bilkent · Applied ML Engineer @ Kuika

Sudem Bulut

Solar model & data

ITU Mathematics · co-founder @ zaaf.ai

Enis Getmez

Product & AI

co-founder @ zaaf.ai

Ömer Ayhan

Engineer

HubX

The Helios team at the KOÇ Sustainable Tech Hackathon in Istanbul

Istanbul · hackathon day

Every roof has a sun score