ᐅ Photovoltaics

Find out how to generate your own electricity with photovoltaic systems – learn what to consider during planning, installation, and operation!

Photovoltaic System: Costs and Savings Potential – Experiences?

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Hans-Maulwurf•16 Jan 2020 10:50

Answers: 240

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Fuchur • 10 Nov 2021 19:22

Route an empty conduit for the photovoltaic system from the utility room to the roof.

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fatbauj•1 Nov 2021 16:06

Answers: 4

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fatbauj • 9 Nov 2021 20:51

Which Electric Vehicle Charging Station to Choose

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Pacc666•26 Oct 2021 08:08

Answers: 18

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Nordlys • 28 Oct 2021 18:54

Photovoltaic System for 120 sqm of Living Space – Should the Entire Roof Be Covered?

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Kalibri•25 Oct 2021 23:00

Answers: 45

KingJulien • 27 Oct 2021 22:31

Photovoltaic system / heat pump – do you have two meters?

chewbacca123•2 Jan 2021 07:15

Answers: 55

OWLer • 6 Oct 2021 16:12

Photovoltaic system with future battery upgrade: What do I need to consider?

Araknis•28 Sep 2021 20:12

Answers: 8

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Deliverer • 4 Oct 2021 14:24

Preparation for Photovoltaic System – Installation of Tile with Conduit for Cable Routing

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Hausenno•27 Sep 2021 12:02

Answers: 1

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RotorMotor • 27 Sep 2021 12:31

Looking for a New Construction Guide on Photovoltaic Systems

2023HausBochum•22 Sep 2021 12:50

Answers: 3

Mahri23 • 23 Sep 2021 16:34

What are your real-life experiences with photovoltaic systems?

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konibar•15 Sep 2021 10:42

Answers: 7

Mahri23 • 21 Sep 2021 16:55

Photovoltaic system on a multi-family building. Is 100% approval from the homeowners' association required?

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fraubauer•2 Sep 2021 16:31

Answers: 27

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nordanney • 3 Sep 2021 12:28

Choosing the Wallbox for a New Build

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Acof1978•7 May 2021 07:24

Answers: 21

untergasse43 • 25 Aug 2021 23:33

Calculation of the Economic Feasibility of a Photovoltaic System

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Höhlenbewohner•17 Aug 2021 13:01

Answers: 11

Hangman • 17 Aug 2021 16:51

Photovoltaic system on a flat roof / Loads?

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SebastianLiesa•22 Jul 2021 19:33

Answers: 6

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miho • 23 Jul 2021 13:31

Costs of Photovoltaic Systems with Energy Storage

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Fips0001•27 Jun 2021 19:20

Answers: 120

Tarnari • 16 Jul 2021 23:36

Commissioning a photovoltaic system and charging an electric vehicle.

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Stefan2.84•8 Jul 2021 09:37

Answers: 47

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Stefan2.84 • 8 Jul 2021 19:24

Advantages and Disadvantages of a Hobby Photovoltaic System

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Tx-25•5 Jul 2021 09:35

Answers: 5

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Seppl90 • 6 Jul 2021 14:47

Tax Advantages of a Photovoltaic System?

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Plonk109•21 Feb 2021 16:50

Answers: 11

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Reltaw2021 • 1 Jul 2021 14:25

Which provider or manufacturer is recommended for a photovoltaic system?

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Pacc666•17 Jun 2021 13:21

Answers: 3

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nordanney • 17 Jun 2021 21:11

KfW 40+ Subsidy with Photovoltaic System and Ventilation Unit

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Thomas W.•30 Mar 2021 04:39

Answers: 8

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freithelm • 10 May 2021 23:47

New Carport: Should I install two high-voltage outlets and size conduit for a future photovoltaic system?

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Nemo2002•10 Feb 2021 08:10

Answers: 10

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hanse987 • 10 Feb 2021 13:59

Experiences with Photovoltaic System Performance?

Tarnari•17 Jan 2021 22:58

Answers: 22

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Andre77 • 21 Jan 2021 12:35

Limitation of photovoltaic system output due to subsidy conditions

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WilderSueden•19 Jan 2021 21:45

Answers: 6

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Fuchur • 20 Jan 2021 22:01

Solar Thermal vs. Photovoltaics

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MP12345•23 Dec 2020 08:40

Answers: 13

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hampshire • 27 Dec 2020 11:43

Should You Install a Photovoltaic Battery Storage System or Not?

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Heidi1965•2 Dec 2020 17:42

Answers: 53

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hampshire • 18 Dec 2020 15:03

Combination of air-to-air heat pump, air-to-water heat pump, solar thermal system, and photovoltaic system with storage

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KevinHoehne•29 Sep 2020 14:57

Answers: 20

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dhd82 • 8 Dec 2020 22:27

Lower Saxony provides subsidies for photovoltaic battery storage.

Golfi90•28 Oct 2020 20:50

Answers: 20

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UpperEast • 9 Nov 2020 15:40

Photovoltaics – Questions About Taxes and Commercial Classification

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Christian K.•5 Sep 2019 16:44

Answers: 78

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annab377 • 23 Oct 2020 19:51

Orientation of the Photovoltaic System

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Stadtvilla19•17 Mar 2020 09:21

Answers: 15

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knalltüte • 6 Aug 2020 16:47

Photovoltaics and Heat Pumps – Meter Confusion and Cost Issues

kati1337•17 Jul 2020 20:29

Answers: 12

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Martial.white • 28 Jul 2020 21:15

Connecting a Heat Pump Water Heater with a Photovoltaic System

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neutronbx•18 Jul 2020 03:51

Answers: 6

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Ybias78 • 20 Jul 2020 14:14

Air-to-water heat pump combined with solar thermal or photovoltaic systems?

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Malte1910•14 Jul 2020 09:34

Answers: 6

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Octrineddy • 14 Jul 2020 11:10

Solar thermal systems or photovoltaic panels combined with a gas heating system

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neutronbx•4 Jul 2020 01:53

Answers: 4

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knalltüte • 4 Jul 2020 22:26

Preparing for Future Photovoltaic Installation?

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Detlev69•9 Sep 2019 19:45

Answers: 39

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Fuchur • 30 Jun 2020 19:47

Photovoltaic System: How Many kWp Are Sufficient for a House?

lin0r87•19 Mar 2020 09:10

Answers: 80

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ntsa86 • 9 May 2020 13:40

Heat pump combined with photovoltaic system, with or without energy storage

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Heidi1965•4 Apr 2020 23:29

Answers: 11

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Specki • 8 May 2020 06:45

Integration of Air-to-Water Heat Pump, Photovoltaic System, and Energy Storage

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Appel2000•29 Dec 2019 23:12

Answers: 38

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hampshire • 7 May 2020 15:09

Photovoltaic system with battery storage, with or without cloud service plan

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ms-t-89•10 Mar 2020 21:06

Answers: 13

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hampshire • 5 May 2020 09:02

Which Heat Pump and Solar Power System Should You Choose?

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Heidi1965•28 Apr 2020 20:42

Answers: 2

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miho • 29 Apr 2020 22:06

Commissioning of a 9.3 kWp system combined with an air-to-water heat pump and mechanical ventilation with heat recovery

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Chris_Colt•22 Mar 2020 12:43

Answers: 10

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gnika77 • 29 Mar 2020 20:45

Heat Pump BAFA Subsidy and Photovoltaics

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Lucky40•6 Mar 2020 20:17

Answers: 3

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gnika77 • 29 Mar 2020 15:51

Is it practical to install a photovoltaic system on the west or east side of a building?

kaho674•5 Jan 2020 18:42

Answers: 78

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CrazyChris • 2 Mar 2020 10:29

New Construction: Can an Air Source Heat Pump Be Combined with a Photovoltaic System?

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Micha Dolle•29 Jan 2020 21:28

Answers: 7

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hegi___ • 30 Jan 2020 18:19

Which conduit is suitable for photovoltaic installations?

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pffreestyler•7 Jan 2020 13:41

Answers: 13

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miho • 9 Jan 2020 12:58

Photovoltaic system with supplementary storage heaters

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bloodyscorpion•18 Dec 2019 20:10

Answers: 12

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Grundaus • 8 Jan 2020 12:56

Is it still worthwhile to install a solar thermal system when you already have an air-to-water heat pump and photovoltaic panels?

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ludwig88sta•16 Dec 2019 13:08

Answers: 24

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CrazyChris • 7 Jan 2020 14:05

Gas with solar thermal or heat pump? And possibly photovoltaic panels as well?

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Hausbau129•18 Oct 2019 14:23

Answers: 13

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Specki • 13 Dec 2019 06:37

Experiences with photovoltaic systems on a house with five residential units?

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Pianist•8 Dec 2019 12:42

Answers: 18

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guckuck2 • 10 Dec 2019 15:53

A photovoltaic system that pays for itself and breaks even on a monthly basis

Golfi90•19 Nov 2019 07:35

Answers: 41

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Specki • 20 Nov 2019 14:41

Assessment of Photovoltaic System, Sizing

Tarnari•7 Nov 2019 21:55

Answers: 16

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guckuck2 • 15 Nov 2019 20:03

Comparison of Photovoltaic System Quotes

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Tx-25•4 Sep 2019 17:58

Answers: 9

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boxandroof • 5 Sep 2019 09:53

Photovoltaic Systems: Advantages, Disadvantages, Experiences, and Is It Worthwhile?

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Fortuna86•9 Jul 2014 11:42

Answers: 133

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WilhelmRo • 3 Sep 2019 10:41

Photovoltaic system purchased with an existing house – what steps should be taken?

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Tobibi•21 Aug 2019 08:33

Answers: 2

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boxandroof • 26 Aug 2019 21:06

Ventilation bricks causing issues with photovoltaic systems – any experiences?

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Christian K.•21 Jun 2019 22:19

Answers: 11

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hampshire • 24 Jun 2019 17:05

Photovoltaic System – Is It Worth It?

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felixdummy•26 Jan 2019 13:42

Answers: 26

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hampshire • 28 Mar 2019 12:08

Solar Power System: Your Yield in the Year 2018

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Spinne•4 Jan 2019 11:17

Answers: 21

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bortel • 22 Jan 2019 09:13

Photovoltaic System: Output in Poor Weather Conditions

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AndreasPlü•24 Aug 2018 09:07

Answers: 15

Nemo2008 • 2 Oct 2018 20:05

Operating data of a 10 kWp system. Various data updates

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jx7•25 Feb 2018 21:25

Answers: 15

Nemo2008 • 30 Aug 2018 23:50

Photovoltaic system in a new build: Would you install one? Any experiences?

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Skyfire•27 May 2018 10:44

Answers: 31

HAL06120 • 19 Jun 2018 15:14

Photovoltaic Systems: What Has Been Your Experience?

Bien-Zenker•9 May 2018 15:26

Answers: 40

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miho • 14 May 2018 15:21

Built-in roof photovoltaic system in Chemnitz

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rajko•15 Apr 2018 14:24

Answers: 7

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toxicmolotof • 21 Apr 2018 21:31

Depreciation, Income Tax, and Hardship Relief

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jx7•20 Mar 2018 13:37

Answers: 5

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toxicmolotof • 20 Mar 2018 20:50

Cost-effectiveness of Photovoltaics – My Findings – Is Something Missing?

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jx7•5 Mar 2018 10:31

Answers: 65

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toxicmolotof • 16 Mar 2018 18:25

Photovoltaic shingles instead of a photovoltaic system

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Specki•15 Mar 2018 08:57

Answers: 5

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miho • 15 Mar 2018 16:56

Is it not possible to operate a photovoltaic system with battery completely off-grid?

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junge_familie•11 Mar 2018 11:13

Answers: 6

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Domski • 11 Mar 2018 16:41

Planning Photovoltaic Systems – Potential Retrofit of Battery Storage

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jx7•12 Feb 2018 10:04

Answers: 13

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Mastermind1 • 5 Mar 2018 21:36

Expanding a Photovoltaic System on a Garage After Initial Installation?

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Chris2806•21 Feb 2018 14:06

Answers: 9

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miho • 22 Feb 2018 16:57

Cost-effectiveness of a 10 kW system versus a 5 kW system

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jx7•19 Feb 2018 12:03

Answers: 11

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Fuchur • 21 Feb 2018 18:26

Prices of photovoltaic providers? Prices significantly higher than expected

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AndreasPlü•21 Feb 2018 10:32

Answers: 2

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Alex85 • 21 Feb 2018 17:48

Photovoltaic System – What Is the Best Roof Orientation?

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Skyfire•20 Feb 2018 12:26

Answers: 4

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toxicmolotof • 20 Feb 2018 23:20

Experiences with Installing Photovoltaic Panels on Different Roof Orientations?

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Skyfire•20 Feb 2018 10:13

Answers: 3

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Alex85 • 20 Feb 2018 18:19

Solar for hot water and heating, or is photovoltaic better for electricity?

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Pädda•4 Feb 2018 18:46

Answers: 21

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Baumfachmann • 6 Feb 2018 22:44

Roof with photovoltaic system or alternative investments – experiences?

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RumpelHumpel•7 Aug 2017 21:21

Answers: 19

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RumpelHumpel • 20 Oct 2017 11:37

New photovoltaic system with storage in a single-family house – experiences

berny•29 Aug 2016 10:59

Answers: 39

berny • 10 Oct 2017 21:21

Photovoltaic System – Where Should the Conduits Be Installed?

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titoz•8 Jul 2017 00:33

Answers: 1

Kaspatoo • 10 Sep 2017 15:25

Solar patio roof as an alternative to a photovoltaic system?

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jeti79•10 Jun 2017 13:00

Answers: 4

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toxicmolotof • 10 Jun 2017 20:45

Is a photovoltaic system with storage and additional solar panels mandatory?

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frank_gayer•10 Jun 2017 08:39

Answers: 12

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Alex85 • 10 Jun 2017 19:36

Photovoltaic system without battery storage initially

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ehaefner•2 Mar 2017 09:49

Answers: 54

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toxicmolotof • 17 May 2017 19:55

New Construction Preparation for Future Experience Documentation

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tb111•11 Sep 2016 08:47

Answers: 16

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tb111 • 10 Apr 2017 06:58

Photovoltaic Systems for Self-Consumption

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nelly190•23 Jan 2017 20:08

Answers: 11

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nelly190 • 29 Mar 2017 16:48

Preparation for photovoltaic or solar thermal systems with an air-to-water heat pump

seth0487•29 Dec 2016 23:21

Answers: 18

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Alex85 • 3 Jan 2017 09:41

Photovoltaic system or geothermal heating

Musterfrau•17 Dec 2016 12:09

Answers: 2

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Leser111 • 23 Dec 2016 16:38

Introduction to Photovoltaic Systems (New Construction)

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jeti79•22 Nov 2016 18:22

Answers: 25

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KapitelII • 18 Dec 2016 00:21

Should the conduit for the photovoltaic system be installed through the roof in advance?

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KrustyDerClown•23 Nov 2016 21:54

Answers: 6

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KrustyDerClown • 26 Nov 2016 13:50

Photovoltaic Experts – Improving Our Electricity Consumption?

Nafetsm•14 Nov 2016 21:46

Answers: 7

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toxicmolotof • 15 Nov 2016 22:49

Natural Gas + Photovoltaics – Experiences with the Energy Saving Regulation (EnEV) from 2016

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Silent010•20 Sep 2016 09:26

Answers: 8

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Legurit • 22 Sep 2016 00:10

Operating a heat pump independently with a photovoltaic system.

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Inotsara•18 Dec 2015 19:51

Answers: 88

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Grym • 18 Sep 2016 13:24

KfW 40+ and 10,000 Houses Program – Requirements for Photovoltaic Systems?

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daniels87•18 Mar 2016 08:04

Answers: 13

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toxicmolotof • 16 Jul 2016 23:35

Photovoltaic Battery Storage – Experiences? Tips?

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AndreasPlü•8 Jul 2016 12:13

Answers: 17

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toxicmolotof • 13 Jul 2016 17:15

Photovoltaic panels on the roof as a second layer

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dieter_m•30 May 2016 00:47

Answers: 11

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dieter_m • 30 May 2016 22:45

March 16, 2016: Start of Photovoltaic System Installation

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T21150•16 Mar 2016 10:51

Answers: 60

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T21150 • 26 Apr 2016 07:35

Credit of photovoltaic electricity toward primary energy demand

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world-e•22 Apr 2016 20:59

Answers: 4

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world-e • 23 Apr 2016 17:53

Thermal Solar: Photovoltaic System for Domestic Hot Water Production

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T21150•7 Apr 2016 21:29

Answers: 1

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T21150 • 10 Apr 2016 09:33

Photovoltaic + Battery Systems – Which One? Experiences?

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Bau.Joe•2 Jan 2016 10:27

Answers: 17

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T21150 • 23 Feb 2016 09:03

Photovoltaic System for New Single-Family Home Construction

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TobiasW.•9 Feb 2016 21:05

Answers: 2

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nordanney • 10 Feb 2016 07:20

Photovoltaics and Building Biology

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-•23 May 2011 22:03

Answers: 6

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- • 2 Feb 2016 06:16

Photovoltaic System: Self-Consumption Rate with Battery Storage and Additional Questions

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T21150•27 Nov 2015 13:23

Answers: 27

f-pNo • 8 Jan 2016 15:26

Is a natural stone heating system practical when combined with a photovoltaic system?

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Mellomacher•29 Sep 2012 18:18

Answers: 16

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JessicaT • 22 Dec 2015 10:55

Solar / Photovoltaics from an Economic Perspective

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Zeltli•13 Oct 2015 18:36

Answers: 53

f-pNo • 20 Nov 2015 22:15

Is installing a photovoltaic system on my roof worthwhile for me?

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-•26 Nov 2012 17:22

Answers: 7

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- • 12 Nov 2015 11:06

Solar Power, Photovoltaics with West-Facing Orientation

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Supergrover•18 Sep 2015 10:18

Answers: 3

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Supergrover • 18 Sep 2015 13:20