Case of household photovoltaic storage system in Hamburg, Germany

Customer background

Family composition: 4-person family (couple + 2 children), single-family house (200㎡)

Original energy situation:

Annual electricity consumption: 6,200kWh (including electric vehicle charging)

Electricity expenditure: 0.38€/kWh (2,356€ per year)

Existing equipment: 8kW rooftop photovoltaic (no energy storage, surplus power grid price 0.10€/kWh)

Key scenario realization:

Peak-valley arbitrage: charging with valley electricity (0.25€) at night and discharging with peak electricity (0.45€) during the day, saving 420€ per year

Emergency backup: continuous power supply for 48 hours during the snowstorm power outage in December 2023 (heating + refrigerator)

Electric vehicle integration: charging with photovoltaic surplus power, saving 1,100€ in fuel costs per year

Core advantages of the solution

German localization adaptation: low temperature battery + dual certification (CE+VDE)

Intelligent energy management: automatic switching of off-grid/grid mode

Maximum use of policies: subsidy application + green power tax rebate