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Hamburg-headquartered clean-tech firm 1KOMMA5° has found that German households switching from gas heating to a solar, battery storage and heat pump package could save over 12,000 euros across 25 years, even after financing costs. The analysis compared a 10,000-euro gas heating system against a 60,000-euro clean-energy package, factoring in a 5.99% interest rate and a 16,500-euro government subsidy. Total cost came to 104,542 euros for the electrified setup versus 116,993 euros for gas over the period. 1KOMMA5° said pairing the system with its Heartbeat energy management software, which automatically stores or trades solar power, could cut electricity bills by a further 42 euros per month. The findings arrive as heat pumps became Germany’s best-selling heating technology in 2025, accounting for 48% of new installations.
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