ᐅ Photovoltaics

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

Photovoltaic system: about 8 kW or 11 kW?

H

HubiTrubi40•24 Mar 2026 13:37

Answers: 19

M

MachsSelbst • 8 Apr 2026 17:06

Planning a Photovoltaic System – Is There a Tool Available?

H

HubiTrubi40•11 Feb 2026 17:19

Answers: 26

H

HubiTrubi40 • 12 Mar 2026 08:45

Which roof hooks are suitable for the flat tile Turmalin (by BRAAS)

U

UnfähigerBeamt•9 Mar 2026 22:42

Answers: 0

U

UnfähigerBeamt • 9 Mar 2026 22:42

Installing the inverter outdoors?

B

Bierwächter•2 Jun 2025 20:02

Answers: 33

B

Bierwächter • 28 Jan 2026 03:34

Roof renovation: Replace or keep solar thermal when adding PV panels and an oil heating system?

S

silverdok•1 Jan 2026 14:11

Answers: 7

S

silverdok • 5 Jan 2026 12:53

DIY Solar Power System Based on 48V: Tips on Inverters, Charge Controllers, and Energy Storage

P

PurePower•10 Dec 2025 15:24

Answers: 3

0

007sascha • 12 Dec 2025 10:37

Photovoltaic System for a KfW 55 Semi-Detached House with Heat Pump: Tips on Storage and Orientation Choices

J

JAMO_HH•4 Dec 2025 22:10

Answers: 17

G

GeraldG • 7 Dec 2025 11:18

Energy Efficiency Calculation with Photovoltaic System

N

Newbi23•11 Oct 2025 20:48

Answers: 4

D

Dahlbomii • 16 Oct 2025 16:07

Experiences with electricity prices at the energy market?

tomtom79•27 Sep 2025 13:46

Answers: 0

tomtom79 • 27 Sep 2025 13:46

Registering a photovoltaic system – Should you pay for it yourself?

H

Häuslebauer36•31 Jul 2025 17:50

Answers: 15

Y

ypg • 3 Aug 2025 12:27

Photovoltaic Consultation: 45° Hipped Roof Facing North/South

C

CC35BS38•17 Apr 2025 15:06

Answers: 34

J

Jasmin • 27 Jun 2025 10:12

Photovoltaic system from Norddeutsche Solar – any experiences?

jakobus85•19 Feb 2025 20:20

Answers: 13

Pakon • 23 Jun 2025 11:42

Assistance with Solar Panel Decision-Making

N

neutri80•17 May 2025 08:36

Answers: 41

W

wiltshire • 2 Jun 2025 14:38

Planning for a Balcony Solar Power System and More

K

KellerMaus•10 Mar 2025 03:01

Answers: 4

Musketier • 10 Mar 2025 09:05

Entry into force of the Solar Peak Regulation

Musketier•5 Feb 2025 16:13

Answers: 47

Musketier • 26 Feb 2025 10:15

Photovoltaic solar tariff change, solar battery

B

Benben79•6 Aug 2024 20:54

Answers: 3

T

Tobias50 • 7 Feb 2025 22:54

Is the price for the photovoltaic system reasonable? 10.2 kWp with a 5 kWh battery storage

K

Kugelblitz•24 Nov 2024 01:13

Answers: 14

W

wiltshire • 6 Jan 2025 22:40

Using a Tesla Battery as a Home Energy Storage System?

P

Pianist•24 Dec 2024 15:10

Answers: 13

Tolentino • 25 Dec 2024 23:16

Photovoltaics – Roof Placement and Using a Single Meter?

P

Pete1909•12 Sep 2024 09:59

Answers: 10

E

Evolith • 2 Oct 2024 09:19

Single-family home photovoltaic system with 30 kW capacity

B

brandner1860•16 Sep 2024 16:10

Answers: 20

J

J.H.S.H. • 28 Sep 2024 21:00

Quote for photovoltaic system including battery storage – storage yes/no?

H

haus_bau2025•8 Sep 2024 16:53

Answers: 44

E

Evolith • 27 Sep 2024 11:58

End-Terrace House from 1915: Photovoltaic System?

M

mayor333•1 Apr 2024 19:29

Answers: 34

M

mayor333 • 30 Jul 2024 18:16

Application for KfW 442 Solar Power for Electric Vehicles

H

hanghaus2023•26 Sep 2023 18:07

Answers: 42

Malle Zwabber • 19 Jul 2024 12:11

Guide to Photovoltaic Systems on Existing Logistics Buildings Published

P

Partyhupe•12 Jul 2024 15:03

Answers: 3

B

Buchsbaum066 • 13 Jul 2024 09:01

12 kWp photovoltaic system with Trina Vertex S panels, Fronius inverter, and BYD battery storage

I

I_Barbudo_I•27 Apr 2024 15:38

Answers: 5

H

Haus Luni • 27 May 2024 13:24

Ordering a photovoltaic system through a prefabricated house manufacturer?

R

Romeostar•19 May 2024 22:10

Answers: 9

N

nordanney • 20 May 2024 23:50

Photovoltaic System – Rough Cost Estimate

H

HubiTrubi40•12 May 2024 00:45

Answers: 14

Tolentino • 14 May 2024 17:00

Solar panel system for the entire roof or is it better to undersize it?

A

Alec_Trevelyan•2 May 2024 22:12

Answers: 14

OWLer • 5 May 2024 19:30

Experiences with the Strong Energy CRN2ST Storage Tank

T

TiWiSAD•18 Apr 2024 22:38

Answers: 0

T

TiWiSAD • 18 Apr 2024 22:38

Photovoltaic system on the house or garage roof?

D

danielg40•5 Apr 2024 23:37

Answers: 5

Tolentino • 6 Apr 2024 23:52

Should the photovoltaic system be taken into account when sizing the heat pump or not?

R

Radfahrer•28 Sep 2023 21:34

Answers: 20

N

nordanney • 22 Mar 2024 10:56

Photovoltaic system cable entry through exterior wall

B

bikswso•4 Mar 2024 13:07

Answers: 1

A

Allthewayup • 11 Mar 2024 20:42

Baden-Württemberg Photovoltaic Requirement for Existing Buildings – Replacing Roof Tiles

B

bloodyscorpion•11 Feb 2024 11:28

Answers: 18

W

WilderSueden • 19 Feb 2024 19:05

Photovoltaic system Viessmann blackframe vs. DMEG Monotop

A

Alrico1•9 Feb 2024 12:32

Answers: 0

A

Alrico1 • 9 Feb 2024 12:32

Evaluation of Photovoltaic Proposal

K

Kugelblitz•22 Dec 2023 11:38

Answers: 14

J

jens.knoedel • 3 Jan 2024 10:05

Electricity Costs for a KfW QNG 40 House

D

dajotech•5 Dec 2023 23:14

Answers: 19

W

WilderSueden • 6 Dec 2023 22:39

Evaluation of Solar Power System Proposal with Battery Storage

D

Dachshund90•26 Sep 2023 13:02

Answers: 78

D

Dachshund90 • 17 Oct 2023 14:35

Fire Risk of Photovoltaic Batteries: What Are the Installation Options?

B

bwollowb•3 Oct 2023 10:56

Answers: 31

K

KarstenausNRW • 16 Oct 2023 09:15

Photovoltaic System – Installation in the Utility Room

G

Gregor_K•4 Oct 2023 21:00

Answers: 10

W

WilderSueden • 6 Oct 2023 08:21

KfW 40 and QNG: The Role of Photovoltaics and Energy Storage

S

Schnubbihh•23 Sep 2023 21:50

Answers: 9

i_b_n_a_n • 28 Sep 2023 16:54

Minimum Size of a Photovoltaic System for New Construction

R

Ralf1980•26 Sep 2023 10:32

Answers: 4

R

Ralf1980 • 26 Sep 2023 14:18

Convert solar thermal system for hot water to photovoltaic system?

H

hanghaus2023•30 May 2023 15:35

Answers: 12

P

parcus • 20 Sep 2023 13:56

Evaluating the Proposal and Technology of a Photovoltaic System

H

hanghaus2023•30 Jan 2023 12:00

Answers: 86

kati1337 • 19 Sep 2023 21:48

Balcony Solar System: Costs and Benefits – User Experiences?

H

HilfeHilfe•27 Aug 2022 06:48

Answers: 13

G

Grundaus • 30 Aug 2023 12:49

Is it possible to change electricity providers with a bi-directional meter?

B

BiffBiff•10 Aug 2023 11:17

Answers: 2

B

BiffBiff • 10 Aug 2023 22:02

How much energy does a photovoltaic battery storage system supply?

T

tommyboy•6 Aug 2023 17:31

Answers: 7

H

HeimatBauer • 7 Aug 2023 10:46

Green flat roof and photovoltaic system

Q

quisel•9 Apr 2019 17:08

Answers: 14

K

k-man2021 • 9 Jul 2023 19:35

Photovoltaic system with hybrid inverter without internet connection?

K

Kati2022•2 Jun 2023 09:03

Answers: 13

K

Kati2022 • 2 Jul 2023 12:53

Evaluation of Photovoltaic Proposal and Components

J

jessi7755•2 May 2023 17:12

Answers: 34

Nida35a • 8 May 2023 12:30

Is it beneficial to prepare for photovoltaic systems during new construction?

P

Pwnage619•15 Mar 2021 12:39

Answers: 81

S

Scout** • 23 Apr 2023 10:41

Photovoltaics at Any Cost – Current Situation and Available Options

H

HnghusBY•31 Jul 2022 13:22

Answers: 169

F

filosof • 15 Apr 2023 22:21

Planned Throttling of Electric Vehicle Chargers and Heat Pumps

S

sub-xero•15 Mar 2023 10:16

Answers: 34

X

xMisterDx • 9 Apr 2023 12:23

Can someone explain how the feed-in tariff billing works?

H

Heidi1965•19 Mar 2023 17:08

Answers: 0

H

Heidi1965 • 19 Mar 2023 17:08

Photovoltaic system, heat pump, household electricity, and three bi-directional meters

P

Phansol•10 Mar 2023 17:10

Answers: 9

R

RotorMotor • 13 Mar 2023 13:26

Photovoltaic Battery Storage – Market Overview and Fire Risk

DASI90•24 Oct 2022 00:21

Answers: 52

W

WilhelmRo • 7 Mar 2023 08:22

Photovoltaic system on carport without grid feed-in

T

Taillefer•5 Mar 2023 12:58

Answers: 15

F

Fuchur • 5 Mar 2023 20:54

Recovering VAT on Photovoltaic Systems through the General Contractor

W

WilderSueden•23 Mar 2022 11:29

Answers: 10

G

Gerddieter • 2 Mar 2023 23:30

Refund of Value-Added Tax (VAT) on Photovoltaic Systems

S

Silberfuchs•24 Feb 2023 11:42

Answers: 4

F

Fuchur • 26 Feb 2023 12:26

Ordering a photovoltaic system with battery online or locally?

W

Wolf6660•16 Jan 2023 11:25

Answers: 8

G

Grundaus • 8 Feb 2023 09:53

KKT-Kolbe Complete Package – Is It Any Good?

M

Manfred B.•22 Jan 2023 18:22

Answers: 1

S

SoL • 22 Jan 2023 19:07

Experiences with PVT Systems and Ground-Source Heat Pumps?

M

Manfred B.•22 Jan 2023 18:09

Answers: 1

R

RotorMotor • 22 Jan 2023 18:48

Accept an offer for a 16 kWp photovoltaic system at this time?

P

Pitiglianio•14 Dec 2022 20:27

Answers: 36

F

Fuchur • 31 Dec 2022 23:00

Photovoltaics – Should You Keep the Roof As Is or Wait?

P

paulch7•20 Dec 2022 13:03

Answers: 7

P

paulch7 • 21 Dec 2022 18:22

Experiences with photovoltaic systems including battery storage?

R

Robvoi79•11 Dec 2022 13:53

Answers: 11

Araknis • 12 Dec 2022 11:49

Fair Quote for Photovoltaic Systems and Battery Storage?

G

Gelbwoschdd•7 Dec 2022 22:46

Answers: 2

R

RotorMotor • 8 Dec 2022 11:24

Using Photovoltaic Systems for Household Electricity without Grid Feed-In Control

C

Carlanickel•28 Sep 2022 22:39

Answers: 10

C

Carlanickel • 29 Sep 2022 23:09

Electric meter Photovoltaic system (solar power system) Air-source heat pump

M

Manani87•15 Sep 2022 22:05

Answers: 7

S

sysrun80 • 16 Sep 2022 19:39

Photovoltaic system and battery storage not completed at handover

J

Jack Storm•5 Sep 2022 08:47

Answers: 18

J

Jack Storm • 6 Sep 2022 07:10

Solar power system quote for our single-family home

E

Elias_dee•21 Apr 2022 08:45

Answers: 162

E

Elias_dee • 3 Sep 2022 17:07

Inverter: What Should You Consider?

Nixwill2•24 Aug 2022 13:45

Answers: 28

Tolentino • 26 Aug 2022 07:58

Savings from photovoltaic system, battery storage, and electricity cloud

D

DaGoodness•4 Aug 2022 10:12

Answers: 41

D

Dogma • 6 Aug 2022 18:59

Solar energy storage for photovoltaic systems?

D

DachundFach•10 May 2022 17:08

Answers: 7

X

xMisterDx • 27 Jul 2022 01:07

Waiving Feed-in Tariffs: Is It Always Feasible? Storage System Prices?

N

NBN2022•18 Jul 2022 12:52

Answers: 25

E

Evolith • 20 Jul 2022 13:16

Upcoming Incentives for Solar Power?

ruediger42•11 Jul 2022 11:38

Answers: 12

E

Evolith • 20 Jul 2022 12:02

Intelligent Control of Photovoltaic System

G

gregman22•14 Jul 2022 17:43

Answers: 12

D

Deliverer • 15 Jul 2022 18:22

How to Find Solar Panel Providers for a New Build?

H

Hitokiri-1978•4 Jul 2022 13:08

Answers: 24

S

Scout** • 6 Jul 2022 14:20

Current Prices for Photovoltaic Systems / Experiences with Reliability?

T

TmMike_2•26 May 2022 19:27

Answers: 31

moHouse • 22 Jun 2022 15:12

Assessment of Photovoltaic Proposal Including Charging Station and Energy Storage

D

DTvomHaus•19 Jun 2022 19:43

Answers: 7

D

DTvomHaus • 20 Jun 2022 21:46

Assessment of Solar Power System Quote

C

Chrizz72•9 Jun 2022 13:06

Answers: 33

D

Deliverer • 19 Jun 2022 16:11

Incentives for Photovoltaic Systems – Easter Package

askforafriend•18 Feb 2022 14:57

Answers: 108

H

halmi • 2 Jun 2022 14:56

What is the feed-in tariff rate?

H

Heidi1965•29 May 2022 13:48

Answers: 4

i_b_n_a_n • 29 May 2022 18:20

Is Bird Protection for Photovoltaic Systems Useful?

P

Perlchen21w•9 May 2022 21:33

Answers: 5

B

bernie • 19 May 2022 18:22

Photovoltaic system 46562, 8.88 kWp, €13,414.98

M

Malz1902•3 May 2022 13:50

Answers: 10

M

Malz1902 • 4 May 2022 14:15

Restrictions on Photovoltaic Systems in the Development Plan

mayglow•13 Apr 2022 01:21

Answers: 9

D

Deliverer • 15 Apr 2022 10:41

Smart Grid Configuration: Using Photovoltaic Surplus for a Heat Pump

N

neo-sciliar•31 Mar 2022 15:31

Answers: 4

N

neo-sciliar • 6 Apr 2022 09:01

Installing a Photovoltaic System with an Air-to-Water Heat Pump?

H

hauskauf1987•2 Apr 2022 14:05

Answers: 27

W

WilderSueden • 2 Apr 2022 21:32

9.2 kW system – what size battery storage is recommended?

DASI90•30 Mar 2022 09:37

Answers: 11

i_b_n_a_n • 30 Mar 2022 13:04

Expansion of a 3 kWp solar system in Denmark

T

Thorben81•16 Feb 2022 21:53

Answers: 10

G

Grundaus • 30 Mar 2022 13:01

Planning to install solar panels – options: 19 kW peak, 25 kW peak, 30 kW peak, battery storage?

O

Obermuh•27 Mar 2022 09:28

Answers: 30

D

Deliverer • 28 Mar 2022 23:12

What does the rated output power of an inverter mean?

H

Heidi1965•24 Mar 2022 12:57

Answers: 3

Patricck • 27 Mar 2022 19:51

Switching from Gas to Solar / Photovoltaics with or without a Heat Pump

F

free2abc•10 Mar 2022 09:20

Answers: 31

4

4lpha0ne • 25 Mar 2022 10:57

Photovoltaic System and Air-to-Water Heat Pump – Profitability for a Single-Family Home Built to KfW 55 Energy Efficiency Standard

M

Maxwell8•11 Jan 2022 23:19

Answers: 95

C

CC35BS38 • 24 Feb 2022 19:02

Photovoltaic Panels on a Terrace Roof – Does It Make Sense?

H

HoisleBauer22•14 Feb 2022 20:54

Answers: 5

H

HoisleBauer22 • 14 Feb 2022 22:35

Cost-effectiveness of Photovoltaic Systems and Energy Storage

askforafriend•7 Feb 2022 19:49

Answers: 7

E

Evolith • 8 Feb 2022 11:54

New Build Photovoltaic System for Semi-Detached House – Quote Comparison

N

nullhorn•30 Jan 2022 12:18

Answers: 24

D

Durran • 3 Feb 2022 16:01

How large should the photovoltaic system be?

M

MeinHaus45•31 Jan 2022 19:50

Answers: 36

B

borxx • 2 Feb 2022 12:44

Consultation for photovoltaic system

P

Pacc666•13 Sep 2021 14:52

Answers: 227

E

Evolith • 31 Jan 2022 08:56

Inverter and Energy Storage Installed Under the Roof?

N

nullhorn•11 Jan 2022 09:38

Answers: 4

R

RotorMotor • 11 Jan 2022 10:10

Electric Meter for Heat Pump in Combination with BAFA Subsidy and Photovoltaic System

M

Markus254•20 Aug 2021 07:08

Answers: 22

kati1337 • 3 Jan 2022 08:48

Electric Vehicle – Bidirectional Charging: The Next-Generation Battery Storage

DaSch17•19 Dec 2021 23:09

Answers: 37

B

Benutzer200 • 1 Jan 2022 13:06