This topic has been discussed on the Leaf forum (do a search on range trailer in that forum), but know the "Enginer" company is defunct/no longer in business. Here are some (dated) links to explore:
http://www.mynissanleaf.com/viewtopic.php?t=20070 Re: Increasing Nissan Leaf Range with mini battery trailer Jun 27, 2015 http://www.mynissanleaf.com/viewtopic.php?t=16058 For Sale: Enginer 8khw Auxiliary Battery Pack Mar 05, 2014 http://www.mynissanleaf.com/viewtopic.php?t=14654 Extra battery packs to extend the range, Quote Oct 13, 2013 (-trailers-) http://autoweek.com/article/car-news/ep-tender-could-give-electric-cars-unlimited-range EP Tender could give electric cars unlimited range February 13, 2014 ... http://www.eptender.com EP Tender (in French) ... http://electric-vehicle-discussion-list.413529.n4.nabble.com/EVLN-EP-Tender-22kW-trailered-genset-tp4664602.html EVLN: EP Tender 22kW trailered genset Aug 06, 2013 http://www.prnewswire.com/news-releases/the-new-ebuggy-e-mobility-concept-allows-electric-cars-to-travel-any-distance-170301246.html September 19, 2012 Contact: Dr. Manfred Baumgaertner ebuggy GmbH Industriestrasse 25 D-70565 Stuttgart Germany +49-711-782395-60 http://nomadicpower.de/products/ Nomadic Power https://www.facebook.com/ebuggy.com ... http://electric-vehicle-discussion-list.413529.n4.nabble.com/EVLN-ebuggy-rentable-addon-pack-trailer-More-Range-Scotty-td4658133.html EVLN: ebuggy rentable addon-pack-trailer ... !More Range Scotty! Sep 23, 2012 https://endless-sphere.com/forums/viewtopic.php?f=34&t=34697 Leaf propane-powered micro-turbine range extending trailer Dec 16, 2011 ... Here's my Propane-Powered combination 30kW Quick-Charger/Range Extender ... http://www.greencarreports.com/news/1070677_2012-nissan-leaf-gets-unofficial-jet-powered-range-extender-quick-charger For EVLN EV-newswire posts use: http://evdl.org/evln/ {brucedp.150m.com} -- View this message in context: http://electric-vehicle-discussion-list.413529.n4.nabble.com/Leaf-range-extender-tp4680544p4680553.html Sent from the Electric Vehicle Discussion List mailing list archive at Nabble.com. _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)