Let’s show the world that we can do better.

It has never been more important to
generate sustainable energy in order
to enable future generations to live
in a healthy world.


The EU‘s „Green Deal“ entitled „Fit for 55“ is designed to reduce CO2 emissions by at least 55% by 2030 compared to 1990.

The resolution of the Federal Constitutional Court at the beginning of 2021 stipulates that by 2045 Germany has to be climate-neutral, five years earlier than previously planned.

For 2030, the target rises from 55 to 65% reduction in emissions compared to 1990, the year of comparison. The higher target for 2030 was considered necessary in any case after the EU increased its joint climate target. An interim target of -88% is targeted for 2040.

On the path to climate neutrality.

The fact that this will be necessary to stop human-induced global warming is not a new realization.

The EU and the USA want to achieve CO2 neutrality by 2050. China, by 2060. Germany relocates, pushed by the constitutional court, its national target by five years, with the goal of reaching it in 2045. the time has come. From then on, Germany is supposed to be climate- neutral.

The EU, as well as the governments of individual countries do not yet have a concept on how this is to be realized.

Let‘s give our future a chance of a healthy world.


Now !

Climate protection
is our passion.

Volt & Watt S.A. continuously promotes improvement of the ecological footprint with innovative products.

Climate protection is
our passion.

Volt & Watt S.A. continuously promotes improvement of the ecological footprint with innovative products.

Does the production of PV modules consume more energy than they can can supply during operation?


The harvest factor (ERoEI or EROI, Energy Returned on Energy Invested) describes the ratio of the energy provided by a power plant and the energy expended for its life cycle. The Energy Payback Time (EPBT) is the period of time during which a power plant is operated to replace the primary energy to replace the primary energy invested. Harvest factor and energy payback time of PV plants vary with technology and plant location. An analysis commissioned by the German Federal Environmental Agency has EPBT for PV power plants operating in Germany (assumed mean annual irradiation sum at module level 1200 kWh/(m2-a)) was determined to be 1.6 years for multi-modules and 2.1 years for monocrystalline Si modules [UBA7]. With a lifetime of 30 years, this results in harvest factors in the range of 10-15.

Does PV make a relevant contribution to reducing CO2 emissions?


While PV systems do not emit any CO2 during operation, a more holistic view must also take the production and disposal of the system into account. An analysis commissioned by the German Federal Environment Agency has shown a greenhouse gas potential of between 35g and 57g CO2 eq./kWh for PV electricity produced in Germany with monocrystalline PV modules.


Source: Aktuelle Fakten zur Photovoltaik in Deutschland, Harry Wirth, Fraunhofer ISE,
Download from www.pv-fakten.de, Fassung vom 6.8.2021