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Solar calculator · free

Solar calculator Canton of Bern: What can your roof do?

Enter your address, check the roof faces, answer a few short questions. The calculator uses the electricity price of your municipality in the Canton of Bern and shows size, yield, cost, subsidies and payback for your building.

Step 1 of 7:Address

Where is the building?

With the address we load the federal roof data for your building.

Which roof faces are suitable?
What kind of building is it?

Existing building or new build?

Are you the owner?

How much electricity do you use?

People in the household

I know my consumption

It is on your electricity bill. An estimate is fine.

What runs on electricity at your home?

Heat pump

Electric car

What are you planning?

Battery storage

When would you like to build?

Your results are ready.

Where may we send them?

  • System size and yearly yield
  • Cost, subsidies and tax savings
  • Payback with and without battery
  • Results by e-mail to keep

We do not pass on your details. We are not a quote portal, we build the systems ourselves.

about 2 minutes · free · no obligation

  • Federal roof dataArea, pitch and solar irradiation of every roof face (sonnendach.ch).
  • Electricity price of your municipalityElCom tariff 2026 instead of the Swiss average.
  • Checked by a project managerOn request a free site visit and a binding quote within 72 hours.

Prefer to call? 044 980 08 80

  • Jordan Endjilo
  • Zarko Mitrovic
  • Samuel Müller
  • Caroline Ottiker

718 kWp built. From single-family homes to a 150 kWp commercial roof.

  • Member of
  • smart-me Partner 2025

Solar calculator Canton of Bern

What a solar system brings in the Canton of Bern

Worked out with the median 2026 household tariff in the Canton of Bern: 29.9 ct./kWh incl. VAT, the same as the median for Switzerland. For your municipality the calculator uses its own tariff.

Single-family house, existing building, south roof, without battery
HouseholdConsumption per yearSystemPrice after subsidy and tax deductionSaving in year 1Payback
4 persons4,500 kWh6.8 kWpCHF 11,400–15,500CHF 760–79015–22 years
4 persons with heat pump9,500 kWh14.3 kWpCHF 19,900–26,300CHF 1,740–1,78011–16 years
4 persons with heat pump and electric car12,000 kWh15.8 kWpCHF 21,400–28,500CHF 2,170–2,22010–14 years

Assumptions: roof with room for about 16 kWp, 1,000 kWh per kWp and year, feed-in at 8 ct./kWh, one-off payment from Pronovo (CHF 360/kWp), tax deduction at a marginal rate of 25 %. Prices including installation and VAT. Heat pump +5,000 kWh, electric car +2,500 kWh a year.

Work it out for your address

Solar power in the Canton of Bern in figures

  • Electricity price 202629.9 ct./kWhHousehold (H4) incl. VAT, median of 295 municipalities
  • Range across municipalities25.5–44.4 ct./kWhthe same as the median for Switzerland
  • Solar potential of the roofs9,136 GWha year on the suitable roofs (SFOE)
  • Used today11.2 %1,045.2 MWp of solar installed

Sources: ElCom, tariffs 2026; Swiss Federal Office of Energy SFOE, solar potential of Swiss municipalities; Energie Reporter (SwissEnergy, CC BY 4.0).

Electricity price and saving by municipality in the Canton of Bern

The more expensive grid power is, the more the solar system saves. The table works out the example of 4 persons with the tariff of each municipality, most expensive power first.

Household H4 incl. VAT, ElCom 2026; saving in CHF in year 1, payback in years
MunicipalityGrid operatorct./kWhSaving per yearPayback
Teuffenthal (BE)Genossenschaft "Elektra" Buchen-Teuffenthal (EBT)44.4980–1,01012–16
Büren an der AareEnergieversorgung Büren AG41.9940–97012–17
WengiGEBNET AG40.7920–95012–18
Bargen (BE)Gemeinde Bargen BE, Elektrizitätsversorgung40.4920–95012–18
InsEinwohnergemeinde Ins, Elektrizitätsversorgung39.9910–94013–18
Oberwil bei BürenGemeinde Oberwil bei Büren, Energieversorgung39.7910–93013–18
BelpEnergie Belp AG39.3900–93013–18
BlumensteinEnergieversorgung Blumenstein AG (EVB)39.3900–93013–18
EriswilGemeinde Eriswil, Elektrizitätsversorgung38.8890–92013–18
AegertenEinwohnergemeinde Aegerten, Elektroversorgung38.7890–92013–18
GrosshöchstettenEnergie Grosshöchstetten AG38.6890–92013–18
Arni (BE)Arni Energie AG38.4890–92013–18
BrienzwilerGemeinde Brienzwiler, Elekrizität38.2880–91013–18
SafnernEinwohnergemeinde Safnern, Elektroversorgung38.2880–91013–18
BellmundEinwohnergemeinde Bellmund, Elektrizitätsversorgung38.1880–91013–18
LindenELEKTRA ENERGIE Genossenschaft38.0880–91013–18
OberburgEnergie- und Wasserversorgung Oberburg38.0880–91013–18
NidauEinwohnergemeinde Nidau, Elektrizitätsversorgung37.5870–90013–19
SumiswaldEnergie AG Sumiswald37.4870–90013–19
Kirchberg (BE)EnerCom Kirchberg AG37.3870–90013–19
AarbergEvolon AG36.8860–89013–19
BrüggEinwohnergemeinde Brügg, Elektrizitätsversorgung36.8860–89013–19
GrossaffolternEvolon AG36.8860–89013–19
LyssEvolon AG36.8860–89013–19
PieterlenEinwohnergemeinde Pieterlen, Stromverkauf36.8860–89013–19
Oberwil im SimmentalElektrizitäts-Genossenschaft (EGO) Oberwil i.S.36.6860–89013–19
RüderswilElektra Rüderswil Genossenschaft36.3860–88013–19
GsteigElektrizitätsgenossenschaft Gsteig36.1850–88013–19
BernEnergie Wasser Bern36.0850–88013–19
WynauWerkbetriebe Wynau (WBW)35.8850–88013–19
BüetigenEinwohnergemeinde Büetigen, Elektroversorgung35.7850–87014–19
HuttwilIndustrielle Betriebe Huttwil AG35.6850–87014–19
Diessbach bei BürenEinwohnergemeinde Diessbach bei Büren, Elektrizitätsversorgung35.5840–87014–19
AdelbodenLicht- und Wasserwerk Adelboden AG35.4840–87014–19
KoppigenGenossenschaft Elektra Koppigen-Willadingen35.1840–86014–19
PortEinwohnergemeinde Port, Elektrizitätversorgung35.1840–86014–19
WilladingenGenossenschaft Elektra Koppigen-Willadingen35.1840–86014–19
KanderstegLicht- und Wasserwerk AG Kandersteg35.0840–86014–19
WilderswilEinwohnergemeinde Wilderswil, Elektrizitätsversorgung34.7830–86014–20
BurgdorfLocalnet AG34.5830–86014–20
MünsingenInfraWerkeMünsingen (IWM)34.4830–85014–20
LotzwilGemeindebetriebe Lotzwil, Elektrizitätsversorgung34.3830–85014–20
Lengnau (BE)Einwohnergemeinde Lengnau, Finanzverwaltung, Elektrizität-, Wasser-, Abwasser-, Abfallentsorgung34.1820–85014–20
Rüti bei BürenRegio Energie Solothurn33.9820–85014–20
MoosseedorfGenossenschaft Elektra, Jegenstorf33.4810–84014–20
AarwangenEinwohnergemeinde Aarwangen, Elektrizitätsversorgung33.3810–84014–20
AefligenGenossenschaft Elektra, Jegenstorf33.3810–84014–20
BäriswilGenossenschaft Elektra, Jegenstorf33.3810–84014–20
Deisswil b. Münchenbuch.Genossenschaft Elektra, Jegenstorf33.3810–84014–20
FraubrunnenGenossenschaft Elektra, Jegenstorf33.3810–84014–20
HindelbankGenossenschaft Elektra, Jegenstorf33.3810–84014–20
IffwilGenossenschaft Elektra, Jegenstorf33.3810–84014–20
JegenstorfGenossenschaft Elektra, Jegenstorf33.3810–84014–20
KernenriedGenossenschaft Elektra, Jegenstorf33.3810–84014–20
KrauchthalGenossenschaft Elektra, Jegenstorf33.3810–84014–20
LyssachGenossenschaft Elektra, Jegenstorf33.3810–84014–20
MattstettenGenossenschaft Elektra, Jegenstorf33.3810–84014–20
Urtenen-SchönbühlGenossenschaft Elektra, Jegenstorf33.3810–84014–20
WiggiswilGenossenschaft Elektra, Jegenstorf33.3810–84014–20
Zuzwil (BE)Genossenschaft Elektra, Jegenstorf33.3810–84014–20
BiglenEinwohnergemeinde Biglen, Stromversorgung32.9800–83014–20
ArchRegio Energie Solothurn32.8800–83014–20
LangenthalIB Langenthal AG32.8800–83014–20
LeuzigenRegio Energie Solothurn32.8800–83014–20
SiselenEinwohnergemeinde Siselen, Elektrizitätsversorgung32.5800–83014–20
Rapperswil (BE)Genossenschaft Elektra, Jegenstorf32.4800–82014–20
Rüdtligen-AlchenflühGenossenschaft Elektra, Jegenstorf32.4800–82014–20
SteffisburgNetZulg AG32.3790–82014–21
Biel/BienneEnergie Service Biel/Bienne (ESB)31.9790–82014–21
ThunEnergie Thun AG31.7790–81015–21
InterlakenIndustrielle Betriebe Interlaken (IBI) AG31.6780–81015–21
Matten bei InterlakenIndustrielle Betriebe Interlaken (IBI) AG31.6780–81015–21
UnterseenIndustrielle Betriebe Interlaken (IBI) AG31.6780–81015–21
Brienz (BE)Einwohnergemeinde Brienz, Elektrizitätsversorgung31.1780–80015–21
Langnau im EmmentalBKW Energie AG31.0770–80015–21
Oberhofen am ThunerseeEnergie Oberhofen AG31.0770–80015–21
OberdiessbachEinwohnergemeinde Oberdiessbach, Elektrizitätsversorgung30.8770–80015–21
BannwilBKW Energie AG30.5770–79015–21
MelchnauEinwohnergemeinde Melchnau, Elektrizitätsversorgung30.5770–79015–21
SchwarzhäusernBKW Energie AG30.5770–79015–21
WorbBKW Energie AG30.5770–79015–21
KönizBKW Energie AG30.4770–79015–21
UrsenbachEinwohnergemeinde Ursenbach, Elektrizitätsversorgung30.4770–79015–21
Aeschi bei SpiezBKW Energie AG29.9760–79015–22
Affoltern im EmmentalBKW Energie AG29.9760–79015–22
AlchenstorfBKW Energie AG29.9760–79015–22
AllmendingenBKW Energie AG29.9760–79015–22
AmsoldingenBKW Energie AG29.9760–79015–22
AttiswilBKW Energie AG29.9760–79015–22
AuswilBKW Energie AG29.9760–79015–22
BätterkindenBKW Energie AG29.9760–79015–22
BeatenbergBKW Energie AG29.9760–79015–22
BettenhausenBKW Energie AG29.9760–79015–22
BleienbachBKW Energie AG29.9760–79015–22
BolligenBKW Energie AG29.9760–79015–22
BoltigenBKW Energie AG29.9760–79015–22
BönigenBKW Energie AG29.9760–79015–22
BowilBKW Energie AG29.9760–79015–22
Bremgarten bei BernBKW Energie AG29.9760–79015–22
BrenzikofenBKW Energie AG29.9760–79015–22
BrüttelenBKW Energie AG29.9760–79015–22
BühlBKW Energie AG29.9760–79015–22
BurgisteinBKW Energie AG29.9760–79015–22
Busswil bei MelchnauBKW Energie AG29.9760–79015–22
DärligenBKW Energie AG29.9760–79015–22
DotzigenBKW Energie AG29.9760–79015–22
DürrenrothBKW Energie AG29.9760–79015–22
EggiwilBKW Energie AG29.9760–79015–22
EpsachBKW Energie AG29.9760–79015–22
ErizBKW Energie AG29.9760–79015–22
ErlachBKW Energie AG29.9760–79015–22
Erlenbach im SimmentalBKW Energie AG29.9760–79015–22
ErsigenBKW Energie AG29.9760–79015–22
EvilardBKW Energie AG29.9760–79015–22
FahrniBKW Energie AG29.9760–79015–22
FarnernBKW Energie AG29.9760–79015–22
FerenbalmBKW Energie AG29.9760–79015–22
FinsterhennenBKW Energie AG29.9760–79015–22
Forst-LängenbühlBKW Energie AG29.9760–79015–22
FreimettigenBKW Energie AG29.9760–79015–22
FrutigenBKW Energie AG29.9760–79015–22
GalsBKW Energie AG29.9760–79015–22
GampelenBKW Energie AG29.9760–79015–22
GerzenseeBKW Energie AG29.9760–79015–22
GondiswilBKW Energie AG29.9760–79015–22
GrabenBKW Energie AG29.9760–79015–22
GsteigwilerBKW Energie AG29.9760–79015–22
GuggisbergBKW Energie AG29.9760–79015–22
GurzelenBKW Energie AG29.9760–79015–22
GuttannenBKW Energie AG29.9760–79015–22
HabkernBKW Energie AG29.9760–79015–22
HagneckBKW Energie AG29.9760–79015–22
Hasle bei BurgdorfBKW Energie AG29.9760–79015–22
HäutligenBKW Energie AG29.9760–79015–22
HeiligenschwendiBKW Energie AG29.9760–79015–22
HeimbergBKW Energie AG29.9760–79015–22
HeimiswilBKW Energie AG29.9760–79015–22
HellsauBKW Energie AG29.9760–79015–22
HerbligenBKW Energie AG29.9760–79015–22
HermrigenBKW Energie AG29.9760–79015–22
HombergBKW Energie AG29.9760–79015–22
InkwilBKW Energie AG29.9760–79015–22
InnertkirchenBKW Energie AG29.9760–79015–22
IpsachBKW Energie AG29.9760–79015–22
IseltwaldBKW Energie AG29.9760–79015–22
IttigenBKW Energie AG29.9760–79015–22
JabergBKW Energie AG29.9760–79015–22
JensBKW Energie AG29.9760–79015–22
KandergrundBKW Energie AG29.9760–79015–22
KappelenBKW Energie AG29.9760–79015–22
KaufdorfBKW Energie AG29.9760–79015–22
KehrsatzBKW Energie AG29.9760–79015–22
KiesenBKW Energie AG29.9760–79015–22
Kirchdorf (BE)BKW Energie AG29.9760–79015–22
KirchlindachBKW Energie AG29.9760–79015–22
KonolfingenBKW Energie AG29.9760–79015–22
KrattigenBKW Energie AG29.9760–79015–22
KriechenwilBKW Energie AG29.9760–79015–22
LandiswilBKW Energie AG29.9760–79015–22
LauenenBKW Energie AG29.9760–79015–22
LaupenBKW Energie AG29.9760–79015–22
LeissigenBKW Energie AG29.9760–79015–22
LenkBKW Energie AG29.9760–79015–22
LüscherzBKW Energie AG29.9760–79015–22
LützelflühBKW Energie AG29.9760–79015–22
MadiswilBKW Energie AG29.9760–79015–22
MeienriedBKW Energie AG29.9760–79015–22
MeikirchBKW Energie AG29.9760–79015–22
MeinisbergBKW Energie AG29.9760–79015–22
MeiringenBKW Energie AG29.9760–79015–22
MerzligenBKW Energie AG29.9760–79015–22
MirchelBKW Energie AG29.9760–79015–22
MörigenBKW Energie AG29.9760–79015–22
MühlebergBKW Energie AG29.9760–79015–22
MüntschemierBKW Energie AG29.9760–79015–22
Muri bei BernBKW Energie AG29.9760–79015–22
NeueneggBKW Energie AG29.9760–79015–22
NiederhünigenBKW Energie AG29.9760–79015–22
NiedermuhlernBKW Energie AG29.9760–79015–22
NiederönzBKW Energie AG29.9760–79015–22
OberbalmBKW Energie AG29.9760–79015–22
OberbippBKW Energie AG29.9760–79015–22
OberhünigenBKW Energie AG29.9760–79015–22
OberlangeneggBKW Energie AG29.9760–79015–22
OberthalBKW Energie AG29.9760–79015–22
OchlenbergBKW Energie AG29.9760–79015–22
OeschenbachBKW Energie AG29.9760–79015–22
OppligenBKW Energie AG29.9760–79015–22
OrpundBKW Energie AG29.9760–79015–22
OstermundigenBKW Energie AG29.9760–79015–22
PohlernBKW Energie AG29.9760–79015–22
RadelfingenBKW Energie AG29.9760–79015–22
Reichenbach im KandertalBKW Energie AG29.9760–79015–22
ReisiswilBKW Energie AG29.9760–79015–22
ReutigenBKW Energie AG29.9760–79015–22
RiggisbergBKW Energie AG29.9760–79015–22
RohrbachBKW Energie AG29.9760–79015–22
RohrbachgrabenBKW Energie AG29.9760–79015–22
Röthenbach im EmmentalBKW Energie AG29.9760–79015–22
RubigenBKW Energie AG29.9760–79015–22
RüeggisbergBKW Energie AG29.9760–79015–22
RüegsauBKW Energie AG29.9760–79015–22
RumendingenBKW Energie AG29.9760–79015–22
RumisbergBKW Energie AG29.9760–79015–22
RüscheggBKW Energie AG29.9760–79015–22
Rüti bei LyssachBKW Energie AG29.9760–79015–22
RütschelenBKW Energie AG29.9760–79015–22
SaanenBKW Energie AG29.9760–79015–22
SaxetenBKW Energie AG29.9760–79015–22
SchüpfenBKW Energie AG29.9760–79015–22
SchwadernauBKW Energie AG29.9760–79015–22
SchwarzenburgBKW Energie AG29.9760–79015–22
SeftigenBKW Energie AG29.9760–79015–22
SignauBKW Energie AG29.9760–79015–22
SigriswilBKW Energie AG29.9760–79015–22
SpiezBKW Energie AG29.9760–79015–22
St. StephanBKW Energie AG29.9760–79015–22
StettlenBKW Energie AG29.9760–79015–22
Stocken-HöfenBKW Energie AG29.9760–79015–22
Studen (BE)BKW Energie AG29.9760–79015–22
Sutz-LattrigenBKW Energie AG29.9760–79015–22
TäuffelenBKW Energie AG29.9760–79015–22
ThierachernBKW Energie AG29.9760–79015–22
ThörigenBKW Energie AG29.9760–79015–22
ThunstettenBKW Energie AG29.9760–79015–22
ThurnenBKW Energie AG29.9760–79015–22
ToffenBKW Energie AG29.9760–79015–22
TrachselwaldBKW Energie AG29.9760–79015–22
TreitenBKW Energie AG29.9760–79015–22
TrubBKW Energie AG29.9760–79015–22
TrubschachenBKW Energie AG29.9760–79015–22
TschuggBKW Energie AG29.9760–79015–22
Twann-TüscherzBKW Energie AG29.9760–79015–22
UetendorfBKW Energie AG29.9760–79015–22
UnterlangeneggBKW Energie AG29.9760–79015–22
UttigenBKW Energie AG29.9760–79015–22
UtzenstorfBKW Energie AG29.9760–79015–22
VechigenBKW Energie AG29.9760–79015–22
VinelzBKW Energie AG29.9760–79015–22
WachseldornBKW Energie AG29.9760–79015–22
Wald (BE)BKW Energie AG29.9760–79015–22
WalkringenBKW Energie AG29.9760–79015–22
Walliswil bei NiederbippBKW Energie AG29.9760–79015–22
Walliswil bei WangenBKW Energie AG29.9760–79015–22
WalperswilBKW Energie AG29.9760–79015–22
Walterswil (BE)BKW Energie AG29.9760–79015–22
Wangen an der AareBKW Energie AG29.9760–79015–22
WattenwilBKW Energie AG29.9760–79015–22
WichtrachBKW Energie AG29.9760–79015–22
WiedlisbachBKW Energie AG29.9760–79015–22
Wiler bei UtzenstorfBKW Energie AG29.9760–79015–22
WileroltigenBKW Energie AG29.9760–79015–22
Wohlen bei BernBKW Energie AG29.9760–79015–22
WorbenBKW Energie AG29.9760–79015–22
WynigenBKW Energie AG29.9760–79015–22
WyssachenBKW Energie AG29.9760–79015–22
ZäziwilBKW Energie AG29.9760–79015–22
ZollikofenBKW Energie AG29.9760–79015–22
ZweisimmenBKW Energie AG29.9760–79015–22
MünchenbuchseeBKW Energie AG29.6750–78015–22
MünchenwilerGroupe E SA29.5750–78015–22
ZielebachBKW Energie AG29.5750–78015–22
BuchholterbergBKW Energie AG29.1750–77015–22
Seedorf (BE)BKW Energie AG29.1750–77015–22
HerzogenbuchseeBKW Energie AG29.0740–77015–22
Roggwil (BE)Einwohnergemeinde Roggwil, Elektrizitätswerk28.9740–77015–22
BerkenBKW Energie AG28.3730–76016–22
DärstettenBKW Energie AG28.3730–76016–22
DiemtigenBKW Energie AG28.3730–76016–22
FrauenkappelenBKW Energie AG28.3730–76016–22
GrindelwaldJungfraubahn AG28.3730–76016–22
GurbrüBKW Energie AG28.3730–76016–22
HaslibergBKW Energie AG28.3730–76016–22
HeimenhausenBKW Energie AG28.3730–76016–22
HilterfingenBKW Energie AG28.3730–76016–22
HöchstettenBKW Energie AG28.3730–76016–22
Hofstetten bei BrienzBKW Energie AG28.3730–76016–22
Horrenbach-BuchenBKW Energie AG28.3730–76016–22
KallnachBKW Energie AG28.3730–76016–22
LauperswilBKW Energie AG28.3730–76016–22
LigerzBKW Energie AG28.3730–76016–22
Niederried b. InterlakenBKW Energie AG28.3730–76016–22
Oberried am BrienzerseeBKW Energie AG28.3730–76016–22
Ringgenberg (BE)BKW Energie AG28.3730–76016–22
SchangnauBKW Energie AG28.3730–76016–22
SchattenhalbBKW Energie AG28.3730–76016–22
ScheurenBKW Energie AG28.3730–76016–22
Schwanden bei BrienzBKW Energie AG28.3730–76016–22
SeebergBKW Energie AG28.3730–76016–22
UebeschiBKW Energie AG28.3730–76016–22
WimmisBKW Energie AG28.3730–76016–22
GündlischwandJungfraubahn AG27.8730–75016–23
LütschentalJungfraubahn AG27.8730–75016–23
NiederbippEinwohnergemeinde Niederbipp, Elektrizitätsversorgung27.8730–75016–23
LauterbrunnenEWL Genossenschaft25.5690–72017–24

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Frequently asked questions

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044 980 08 80info@solarinnovation.ch
Is the site visit really free?

Yes. The visit and the quote cost you nothing and commit you to nothing. You only decide once you hold the binding quote in your hands.

What does a solar system cost in the Canton of Bern?

For a single-family house of 4 persons the calculator proposes about 6.8 kWp. That costs CHF 17,700–23,200 including installation and VAT. After the one-off payment and the tax deduction, CHF 11,400–15,500 remain. For your roof, the solar calculator above works it out with your address.

Is a solar system worth it in the Canton of Bern?

With the median electricity price in the Canton of Bern (29.9 ct./kWh incl. VAT) this system saves CHF 760–790 in the first year and has paid for itself after 15–22 years. With a heat pump and an electric car it is CHF 2,170–2,220 and 10–14 years, because you use more of the solar power yourself.

In which municipality in the Canton of Bern does solar pay most?

Where grid power is most expensive: Teuffenthal (BE) (44.4 ct.), Büren an der Aare (41.9 ct.), Wengi (40.7 ct.). It is cheapest in Lauterbrunnen (25.5 ct.). The more expensive grid power is, the more every kilowatt hour you use yourself saves.

Does the Canton of Bern subsidise photovoltaics?

The Canton of Bern does not directly subsidise photovoltaics. The federal government pays the one-off payment through Pronovo. Communes and energy suppliers sometimes have their own programmes, which we check for your address when preparing the quote.

Can I deduct a solar system from my taxes in the Canton of Bern?

Investments in energy saving and environmental protection on existing buildings are deductible, and this includes the photovoltaic system. Since the 2024 tax year this also applies to new builds. The tax office's information sheet 5 is the authoritative source.

How accurate is the solar calculator?

It gives guide values, not a quote. It uses the federal roof data (sonnendach.ch), the electricity price of your municipality (ElCom 2026) and the one-off payment from Pronovo. What it cannot see: roof condition, shade from trees, electrical system, access. That is why we check these during a free site visit and send you a binding quote within 72 hours.

Where does the roof data come from?

From the Swiss Federal Office of Energy (sonnendach.ch). It records area, pitch, orientation and solar irradiation of every roof face of every building in Switzerland. The aerial image is from swisstopo. We count about 70 % of the area as panel area; the rest is needed for edges, gaps and roof windows.

Which subsidies are included?

The federal one-off payment (Pronovo): CHF 360 per kWp for systems below 30 kWp, proportionally less above. Plus the tax deduction for existing private buildings, calculated with a marginal tax rate of 25 %. Cantonal and municipal grants are not included; we check them during the site visit.

Is a battery worth it?

A battery raises self-consumption but costs more. Whether it pays depends on the feed-in tariff and your consumption. That is why the calculator shows both options side by side.

Why do you need my contact details?

We send you the results by e-mail, and a project manager looks at the figures. We do not pass on your details. We are not a referral portal; we plan and build the systems ourselves.

Which regions do you cover?

All of German-speaking Switzerland. We build most often in the cantons of Zurich, St. Gallen, Schwyz and Aargau. Our locations are in Zumikon ZH and Lachen SZ.