APE – I can only assume you haven’t got around to browsing the V2G blog yet? Or seen the Tesla Energy hype? Li-ion is “flavour of the month”, not lead/acid. Maybe start here and then click lots of links?
http://www.V2G.co.uk/2015/06/is-distributed-energy-storage-on-ofgems-roadmap/
The inverters certainly implement “anti-islanding” here in the UK. Given the way our National Grid currently works some sort of “community microgrid” would be needed for your own static and/or EV batteries to power your neighbours house.