根据德国EUPD Research的最新报告，一套7 kW的光伏系统连接7 kWh的家用蓄电池可以提供一辆每年平均行驶里程为14000公里的电动汽车所需电力的80%。
这家市场调研公司表示，这相当于全年2500 kWh的用电量。该公司表示，采用6 kW的光伏阵列结合6 kWh的蓄电池也能为一辆每年行驶里程为5000公里、电力需求为900 kWh的电动汽车提供同等比例的电力，并计算得出频繁出行的、电力需求为5000 kWh的车辆需要一套配备储能容量的12 kW系统。
即使没有储能，电动汽车驾驶员也可以使用很大一部分太阳能。例如，一套不含蓄电池的7 kW系统即可通过太阳能发电满足一辆车39%的电力需求。
EUPD Research还表示，太阳能+储能解决方案可以大大降低充电成本。它认为，一套10 kW的系统配上储能可以节省高达52%的充电成本。这相当于每年节省415欧元。
EUPD Research董事总经理Martin Ammon说道：“为了储存自发的太阳能电力用于电动汽车，家用储能系统必不可少，尤其是在冬季。”
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