<div dir="ltr">Marco; <div>Winter storms, hurricanes, earthquakes, tornados, floods, etc. - backup power. Maybe load shaving as the utilities get more persnickety on time of use upcharges.<div><br><div>Of course for most folks, an infernal combustion generator is far more cost effective than batteries. But for an extended grid outage and with a critical loads subpanel installed, PV charges on sunny days, generators still need fuel which may be in short supply or inaccessible.</div><div>So, preppers. Most are surprised at how little autonomy time they get from a really expensive battery bank, but if it's TEOTWAWKI at least their solar "fuel" is free, minus the amortized cost of the battery bank. I get lots of phone calls from preppers who really need lithium prescribed by their psychologist far more than they need it in a backup battery bank......</div><div><br></div><div> Lithium batteries seem impressive on how long they can sit unused / float with no degradation, but I'd rather let all y'all be the guinea pigs on them for awhile. I'm doing my part by guinea pigging NiFe batteries off the grid. So far, so good, and darned glad I now know their ins and outs compared to lead acid. I would have been horribly embarrassed if I'd done my first NiFe battery bank for a customer instead of for myself....I chose NiFe here simply because of decades of historical data, I don't trust Lithium yet for longevity, but thanks Larry C and others on this list who have been doing lithium batteries for years and reporting their results here.</div><div><br></div><div>This Wrenches List is the gold standard of good information!</div><div><br><div class="gmail_extra"><br clear="all"><div><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><span style="font-size:12.8px">Dan Fink</span><div style="font-size:12.8px">Adjunct Professor, Ecotech Institute</div><div style="font-size:12.8px">IREC Certified Instructor\u2122 for: </div><div style="font-size:12.8px">~ PV Installation Professional</div><div style="font-size:12.8px">~ Small Wind Installer</div><div style="font-size:12.8px">Executive Director, Buckville Energy</div><div style="font-size:12.8px">NABCEP Accredited Continuing Education Providers\u2122<br><a href="tel:970.672.4342" value="+19706724342" style="color:rgb(17,85,204)" target="_blank">970.672.4342</a></div><br> </div></div></div></div></div></div></div></div>
<br><div class="gmail_quote">On Sat, Jan 23, 2016 at 1:28 PM, Marco Mangelsdorf <span dir="ltr"><<a href="mailto:marco@pvthawaii.com" target="_blank">marco@pvthawaii.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div lang="EN-US" link="blue" vlink="purple"><div><div><div style="border-style:solid none none;border-top-color:rgb(181,196,223);border-top-width:1pt;padding:3pt 0in 0in"><p class="MsoNormal"><span style="font-size:12pt;font-family:'Times New Roman',serif;color:windowtext">Aloha Larry,<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:12pt;font-family:'Times New Roman',serif;color:windowtext"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:12pt;font-family:'Times New Roman',serif;color:windowtext">To take a step back\u2026what\u2019s the compelling value proposition from the homeowner\u2019s perspective to incur this non-trivial additional expense? To be blunt, what\u2019s in it for them? Back-up power? First adopter mojo?<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:12pt;font-family:'Times New Roman',serif;color:windowtext"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:12pt;font-family:'Times New Roman',serif;color:windowtext">Thanks,<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:12pt;font-family:'Times New Roman',serif;color:windowtext">marco</span><span style="font-size:10pt;font-family:Tahoma,sans-serif;color:windowtext"><u></u><u></u></span></p></div></div><span><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><br></p></span></div></div></blockquote></div></div></div></div></div></div>