there are plenty of alternatives to Chinese gear, SMA / LG battery is a good combination, if a little pricey. Whatever you do buy, it's best to buy as a paackage, not all battery controllers are compatible with every battery. This does tend to make buying a pain in the neck! You could of course run long DC cables into the house. This can be achieved with standard SWA cable (ie armoured) rather than armoured solar cable which is very expensive - people forget standard cable has AC and DC ratings. Don't try to bury solar cable, it doesn't like permanent contact with water, although it could be installed in a duct provided the duct can be kept moisture free. This would mean a single inverter/ battery charge controller in the house. Many installers aren't keen on long DC runs, but seeing as some of the solar frams I've worked on have DC runs in the order of 2/300m it's not an issue, just up cable size to suite.