对一般家庭来说,安装一套3到5kW的光伏发电系统即可(ke)满足日常用电(dian)(dian)所(suo)需。例如河北地区一套3千(qian)瓦系(xi)统(tong)平均(jun)每天可(ke)发(fa)电(dian)(dian)12度(du)电(dian)(dian)左右;5千(qian)瓦系(xi)统(tong)一天发(fa)电(dian)(dian)量平均(jun)在20多度(du),天气较好的时候(hou)可(ke)达到(dao)30度(du)以上,足以供给户用个体使用。由于地区不(bu)同(tong),温度(du)和光照(zhao)条件不(bu)同(tong),所(suo)有(you)发(fa)电(dian)(dian)量会有(you)所(suo)差异。
