My personal experience with a profitability transition






I designed the GEMINI next Generation house in February 2019 and tried to figure out in March 2019 why it looks so different from my design in 1992. The design target was in 1992 30 MWh yearly yield in Austria. This can be done with 30 kW peak south-oriented photovoltaic or 23 kW peak horizontally tracking the sun photovoltaic. Photovoltaics were priced at 7 €/Watt.. 30,000 × 7 €/W peak = 210,000 € but 23,000 × 7 €/W peak + 5,000 € for turning the house is only 166,000 €. In 2019, photovoltaics were already so cheap that 30 MWh/a could be best done by 36 kW peak east-west oriented. Now I tried to figure out in what year the profitability transition took place. It was 2010 and without knowing about the term “profitability transition”, I designed exactly in this year low-rise row houses with south-facing photovoltaic panels. The equation had changed to 30,000 × 1 €/W peak = 30,000 € and 23,000 × 1 €/W peak + 7,000 for turning the house is also 30,000 €. My personal experience with a profitability transition Birds can fly without knowing all the terms of aerodynamics. I reacted with my design change to an ongoing “profitability transition” without knowing the term at this time. Birds can fly without knowing all the terms of aerodynamics. I reacted with my design change in 2010 to an ongoing “profitability transition” without knowing the term at this time. I realized this concept only 9 years later.

  Cost optimization — the key to energy transition and climate protection
Paper written for the CORP.at conference March 22 to 25, 2026, in Vienna. My 2025 participation was a last-minute action, but now I have much time to prepare the paper.

Abstract
To meet the necessary cost optimization targets, we cannot hold the energy problem separate from all other problems: another major problem is housing.
Introduction
Many imaginations about our future had been created in the past with completely different parameters. Unchecked conclusions from the past endanger our future with unbearable costs.
Energy transition
The long way from random electricity from sun and wind towards 24×365 electricity. Overseen profitability transitions have to be considered as major accidents.
The GEMINI principle: double usage of land
No better solar power plant, no better housing possible on the same ground is the ultimate target of the GEMINI principle.
Off-grid fast charging settlements Off-grid fast charging settlements
It can start small, somewhere in a village, with a single GEMINI house with a big PV carport and 100 kW DC charging.
Energy-intensive industry
I once developed a scale for off-grid solar possibilities depending on photovoltaic size. But now is to make a big jump upwards on this scale: running, energy-intensive industry.
Agriculture: How many square meters does a human need for his food? Agriculture: How many square meters does a human need for his food?
Mankind started as hunters and gatherers. 12,000 years ago, 500,000 m² to 2,500,000 m² per human. With the agricultural revolution, the land use was reduced by 2 magnitudes.
Conclusion
All parameters are in a constant state of change. We have to check all the parameters and predict the development for the predictable future.
References
Roland Mösl: Energy Optimised Settlements – Enabler for Necessary Civilization Targets, Graz 2025


          My personal experience with a profitability transition: Birds can fly without knowing all the terms of aerodynamics. I reacted with my design change to an ongoing “profitability transition” without knowing the term at this time. https://climate.pege.org/2026/profitability-transition.htm