GridFree system doesn't have any output to charge batteries. But it still can be solved in other way:
http://gwl-power.tumblr.com/post/39853356143
You need these parts:
LiFePO4 batteries: http://www.ev-power.eu/_d1873.html
Solar regulator: http://www.ev-power.eu/_d4135.html
DC contactor: http://www.ev-power.eu/_d2650.html
GridFree Microinverter: http://www.ev-power.eu/_d3247.html, http://www.ev-power.eu/_d4023.html
Solar panels: http://www.ev-power.eu/Solar-Panels