Installation of a Solar Power System
How to install a solar heat power system
Since 1997 there exists an advisory service
(phased out on Dec. 31, 1997; succession program planned to start in spring
1998) in the FRG for residential buildings which received their planning
permission before 1984. For further information specialized trade, solar-associations
and manufacturers can be asked.
The most important quantity for the dimension of a solar system to
heat industrial water is the consumption of warm water. This should be
determined by guessing or measuring. When the consumption of warm water
is known, the size of the collector surface can be determined.
Graph to determine the size of
a solar system (38 kB- JPG, data: thermic solar systems, market survey
1994/95, Öko-Institut, Freiburg). The graph relates to the location
Freiburg. The solar energy meets to 65% the demand of energy needed to
heat the water.
The result of a market survey of the Öko-Institut-Freiburg 1994/95
which analysed 480 offers revealed that there are costs (including the
installation) for a solar heat power system from 7250,- DM up to 19300,-
DM. The costs for most of the systems were between 10000,- DM and 12000,-
DM. By installing the collector on one´s own the costs for installation
of 20% can be saved. The offers concern a solar system to heat industrial
water with the following key features: 4-person-household, consumption
of 200 Liter of 45°C warm water per day, orientation southward, inclination
of the roof of 45°, frost-resistence up to -30°C, amount of solar
energy 55% minimum, location Freiburg.
The ratification of solar systems is given by the building-regulations-authority.
Responsible for the legislation are the Laender (Landesbauordnung). Usually
solar systems can be installed without special permit if they are installed
on the facade, on flat roofs, or if they are integrated in the roofs. Some
Laender insist upon a ratification-duty for systems which spring out of
the body of the house. Further limitations can be given by local building
plans. In addition to this there may be regulations regarding the design
of the buildings (e.g. protected historic buildings). When planning a solar
heat power system please ask the relevant building-regulations-authorities
for any regulations regarding the ratification of the system.
There are different sponsoring programs of the European
Community, the Federal Government,
the Federal States (Laender),
the Communes and some energy
From 1996 on builders and buyers who create new living space are sponsored
by the Federal Government. In addition to the new building-allowance and
the children-allowance there is an energy-saving-allowance, for example
for the installation of a solar system. Sponsoring for the time of eight
years with up to 500,- DM per year is possible, that means a maximum of
4000,- DM. The allowances can´t be asserted in the tax return as
it was possible before, but they will still be settled on application by
the inland revenue in the future.