I now finally had time to watch the PowerWall introduction video and he indeed says that the DC/DC converter is included, so I am presuming that this allows a direct integration (supply) with solar panels and delivers MPPT for the panels plus BMS for the battery, so only the (bi-directional?) grid-tie inverter is needed to feed the grid (and battery charging at night and stand-alone backup) or just a simple inverter for off-grid only...
Xantrex used to have a combination grid-tie and backup inverter, but just the certification and installation hassles were killing them. Cor van de Water Chief Scientist Proxim Wireless Corporation http://www.proxim.com Email: [email protected] Private: http://www.cvandewater.info Skype: cor_van_de_water XoIP: +31877841130 Tel: +1 408 383 7626 Tel: +91 (040)23117400 x203 -----Original Message----- From: John Lindsay [mailto:[email protected]] Sent: Fri 5/1/2015 11:22 PM To: Cor van de Water; Electric Vehicle Discussion List Subject: Re: [EVDL] Tesla plugs into new market with home battery system My guess: a solar maximum power point tracker is a DC-DC converter, something we are all familiar with. Using something like that to charge the Tesla battery from the solar panels and then discharge it to the solar inverter would make for a useful upgrade to an existing system but not something that would be needed in every deployment case. On the other hand adapting existing designs to use LiPo rather than Lead Acid batteries and taking them to the mass market would make sense if someone were selling a very affordable battery. I think Musk just disrupted the battery industry. John Lindsay > On 2 May 2015, at 3:22 pm, Cor van de Water via EV <[email protected]> wrote: > > I am at a loss why only > the battery is introduced, since you need the inverter to make it work... _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
