Timbering-house, house-roof, sun-collectors, house, residence, roof, solar-cells, collectors, Photovoltaikanlage, Photovoltaik, tramp-generation, solar-installation, energy, hot water-production, energy-production, solar-strength, solar-energy, alternative-energy, solar energy, Ökostrom, energy-production, in an environmentally sound way, alternatively, regenerative,

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Keywords: alternative-energy, alternatively, collectors, energy, energy-production, environmentally, hot, house-roof, lives, photovoltaik, photovoltaikanlage, regenerative, residence, roof, solar, solar-, sound, sun-collectors, timbering-house, virtue, water-production