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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif'>My recommendation on the HUPS that I install are:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><u><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif'>Use a refractometer!<o:p></o:p></span></u></p><p class=MsoNormal><u><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif'><o:p><span style='text-decoration:none'> </span></o:p></span></u></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif'>Check your SG, & compare all cells & if highest to lowest \u2013 If 0.02 or less no need to EQ.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif'> <u>If 0.04 or greater time to EQ.<o:p></o:p></u></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif'>I water every 8 weeks with a pump watering system, winter about 2-3 gallons per 2 months summer 4-4.5 gallons per 2 months.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif'>IMHO \u2013 EQ is rough on most batteries & this recommendation from NWES almost 30+ years ago has served me very well.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif'>I have many clients that have gotten 23+ years on their HUPS. I use them & I have only had to EQ once a year for 4years.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif'>2500 AHR @48 VDC on 6000 watts tracked in a narrow N/S canyon, 4 hours of direct sun Nov 25-Jan 25.<o:p></o:p></span></p><div style='mso-element:para-border-div;border:none;border-bottom:solid windowtext 1.5pt;padding:0in 0in 1.0pt 0in'><p class=MsoNormal style='border:none;padding:0in'><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif'><o:p> </o:p></span></p></div><p class=MsoNormal><span style='font-family:"Century Gothic",sans-serif;color:#002060'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif'>Dana Orzel Great Solar Works, Inc. <o:p></o:p></span></p><p class=MsoNormal><b><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif'>C - 208.721.7003 dana@solarwork.com<o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif'>Idaho Contractor - # 028765 Idaho PV # 028374<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif'>NABCEP # 051112-136 <a href="http://www.solarwork.com/">www.solarwork.com</a><o:p></o:p></span></p><p class=MsoNormal><u><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif'>"Responsible Technologies for Responsible People since 1988" </span></u><u><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif'><o:p></o:p></span></u></p><p class=MsoNormal style='background:white'><b><span style='font-size:18.0pt;font-family:Webdings;color:green'>P</span></b><span style='font-family:"Helvetica",sans-serif;color:navy'> </span><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:green'>Please consider the environment before printing this email.</span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif'><o:p> </o:p></span></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> RE-wrenches <re-wrenches-bounces@lists.re-wrenches.org> <b>On Behalf Of </b>Dave Angelini Offgrid Solar<br><b>Sent:</b> Tuesday, February 9, 2021 1:09 PM<br><b>To:</b> RE-wrenches <re-wrenches@lists.re-wrenches.org><br><b>Subject:</b> Re: [RE-wrenches] Battery Specific Gravity versus Electrolyte Level<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><p>A main point to the choir is that each manufacturer has their own recommendations. The US battery I often use has monthly EQ.<o:p></o:p></p><pre>Looking at 30 years of batteries here and the Offgrid manufactures seem to change what they like over time. Sometimes it is so complicated that I can't expect my client to succeed. I dumb it down, just the basics, and they still get 10 years or more on a set of L16's.<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>I think it is because battery companies are in the business of selling batteries. I appreciate that also! <o:p></o:p></pre><pre><o:p> </o:p></pre><pre>This is not rocket science though, If I had them do all of the things on that list, well, they would not listen to me on the basics.<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>Dave Angelini Offgrid Solar<o:p></o:p></pre><pre>"we go where powerlines don't"<o:p></o:p></pre><pre><a href="http://members.sti.net/offgridsolar/">http://members.sti.net/offgridsolar/</a><o:p></o:p></pre><pre>e-mail <a href="mailto:offgridsolar@sti.net">offgridsolar@sti.net</a><o:p></o:p></pre><pre>text 209 813 0060<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>On Tue, 9 Feb 2021 14:29:12 -0500, Ray <<a href="mailto:ray@solarray.com">ray@solarray.com</a>> wrote:<o:p></o:p></pre><pre>> Dave makes a good point; I also don't recommend opening the cells while <o:p></o:p></pre><pre>> they are charging at a high rate. I like to get SG readings with the <o:p></o:p></pre><pre>> electrolyte being mixed by bubbling, but I turn off the charging <o:p></o:p></pre><pre>> sources, and let it settle down for a few minutes, before opening caps.<o:p></o:p></pre><pre>> <o:p></o:p></pre><pre>> And I second Steve's comments: over charging and over filling the cells <o:p></o:p></pre><pre>> can both lead to more problems than EQing might solve.<o:p></o:p></pre><pre>> <o:p></o:p></pre><pre>> Ray Walters<o:p></o:p></pre><pre>> Remote Solar<o:p></o:p></pre><pre>> 303 505-8760<o:p></o:p></pre><pre>> <o:p></o:p></pre><pre>> On 2/9/21 10:35 AM, Dave Angelini Offgrid Solar wrote:<o:p></o:p></pre><pre>>> That does not sound best to me. I get the point but there are much<o:p></o:p></pre><pre>>> better<o:p></o:p></pre><pre>>> ways. Not good for you to be close around a bank in EQ. If you are<o:p></o:p></pre><pre>>> checking<o:p></o:p></pre><pre>>> water level every month the level should not be really low. You do this<o:p></o:p></pre><pre>>> in<o:p></o:p></pre><pre>>> case you miss a cell a month back! You should be counting as the water<o:p></o:p></pre><pre>>> goes<o:p></o:p></pre><pre>>> in to see if you have put about the same amount in. I have never noticed<o:p></o:p></pre><pre>>> any advantage to mixing the cells after watering. They will get mixed the<o:p></o:p></pre><pre>>> next day. If this concerned you, you could run a 30 minute absorb after<o:p></o:p></pre><pre>>> watering.<o:p></o:p></pre><pre>>><o:p> </o:p></pre><pre>>> I like to EQ before watering so my customer does not over fill and start<o:p></o:p></pre><pre>>> the corrosion process. Just open all of the cells and look before they<o:p></o:p></pre><pre>>> EQ.<o:p></o:p></pre><pre>>><o:p> </o:p></pre><pre>>> I also like to mark 2 of the lower SG cells and 2 of the good ones. This<o:p></o:p></pre><pre>>> makes it easier for my clients to check the bank. Once every summer or 2<o:p></o:p></pre><pre>>> they need to look at all of the cells. Summer is best because it is the<o:p></o:p></pre><pre>>> time when you can do long corrective EQ's if you find trouble.<o:p></o:p></pre><pre>>><o:p> </o:p></pre><pre>>><o:p> </o:p></pre><pre>>> Dave Angelini Offgrid Solar<o:p></o:p></pre><pre>>> "we go where powerlines don't"<o:p></o:p></pre><pre>>> <a href="http://members.sti.net/offgridsolar/">http://members.sti.net/offgridsolar/</a><o:p></o:p></pre><pre>>> e-mail <a href="mailto:offgridsolar@sti.net">offgridsolar@sti.net</a><o:p></o:p></pre><pre>>> text 209 813 0060<o:p></o:p></pre><pre>>><o:p> </o:p></pre><pre>>> On Tue, 9 Feb 2021 05:36:39 -0800, Mark Frye <<a href="mailto:markf@berkeleysolar.com">markf@berkeleysolar.com</a>><o:p></o:p></pre><pre>>> wrote:<o:p></o:p></pre><pre>>>> My Rolls manual says:<o:p></o:p></pre><pre>>>><o:p> </o:p></pre><pre>>>> "It is recommended to water the battery cells half way through the<o:p></o:p></pre><pre>>>> equalization. This is to<o:p></o:p></pre><pre>>>> assure the water is completely mixed into the electrolyte."<o:p></o:p></pre><pre>>>><o:p> </o:p></pre><pre>>>> _______________________________________________<o:p></o:p></pre><pre>>>> List sponsored by Redwood Alliance<o:p></o:p></pre><pre>>>><o:p> </o:p></pre><pre>>>> List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><o:p></o:p></pre><pre>>>><o:p> </o:p></pre><pre>>>> Change listserver email address & settings:<o:p></o:p></pre><pre>>>> <a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><o:p></o:p></pre><pre>>>><o:p> </o:p></pre><pre>>>> There are two list archives for searching. When one doesn't work, try<o:p></o:p></pre><pre>>> the<o:p></o:p></pre><pre>>>> other:<o:p></o:p></pre><pre>>>> <a href="https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/">https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/</a><o:p></o:p></pre><pre>>>> <a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><o:p></o:p></pre><pre>>>><o:p> </o:p></pre><pre>>>> List rules & etiquette:<o:p></o:p></pre><pre>>>> <a href="http://www.re-wrenches.org/etiquette.htm">http://www.re-wrenches.org/etiquette.htm</a><o:p></o:p></pre><pre>>>><o:p> </o:p></pre><pre>>>> Check out or update participant bios:<o:p></o:p></pre><pre>>>> <a href="http://www.members.re-wrenches.org">http://www.members.re-wrenches.org</a><o:p></o:p></pre><pre>>> _______________________________________________<o:p></o:p></pre><pre>>> List sponsored by Redwood Alliance<o:p></o:p></pre><pre>>><o:p> </o:p></pre><pre>>> List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><o:p></o:p></pre><pre>>><o:p> </o:p></pre><pre>>> Change listserver email address & settings:<o:p></o:p></pre><pre>>> <a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><o:p></o:p></pre><pre>>><o:p> </o:p></pre><pre>>> There are two list archives for searching. When one doesn't work, try<o:p></o:p></pre><pre>>> the other:<o:p></o:p></pre><pre>>> <a href="https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/">https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/</a><o:p></o:p></pre><pre>>> <a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><o:p></o:p></pre><pre>>><o:p> </o:p></pre><pre>>> List rules & etiquette:<o:p></o:p></pre><pre>>> <a href="http://www.re-wrenches.org/etiquette.htm">http://www.re-wrenches.org/etiquette.htm</a><o:p></o:p></pre><pre>>><o:p> </o:p></pre><pre>>> Check out or update participant bios:<o:p></o:p></pre><pre>>> <a href="http://www.members.re-wrenches.org">http://www.members.re-wrenches.org</a><o:p></o:p></pre><pre>>><o:p> </o:p></pre><pre>> _______________________________________________<o:p></o:p></pre><pre>> List sponsored by Redwood Alliance<o:p></o:p></pre><pre>> <o:p></o:p></pre><pre>> List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><o:p></o:p></pre><pre>> <o:p></o:p></pre><pre>> Change listserver email address & settings:<o:p></o:p></pre><pre>> <a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><o:p></o:p></pre><pre>> <o:p></o:p></pre><pre>> There are two list archives for searching. When one doesn't work, try the<o:p></o:p></pre><pre>> other:<o:p></o:p></pre><pre>> <a href="https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/">https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/</a><o:p></o:p></pre><pre>> <a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><o:p></o:p></pre><pre>> <o:p></o:p></pre><pre>> List rules & etiquette:<o:p></o:p></pre><pre>> <a href="http://www.re-wrenches.org/etiquette.htm">http://www.re-wrenches.org/etiquette.htm</a><o:p></o:p></pre><pre>> <o:p></o:p></pre><pre>> Check out or update participant bios:<o:p></o:p></pre><pre>> <a href="http://www.members.re-wrenches.org">http://www.members.re-wrenches.org</a><o:p></o:p></pre></div></body></html>