<div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Fortunately, the owner is pretty handy and is willing to live with any negative consequences. That said, I want to offer him something as simple and bulletproof as possible. I am walking into this with eyes wide open, for sure.</div><div><div dir="ltr" class="gmail_signature"><div dir="ltr"><br>Jason Szumlanski<div><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">Principal Solar Designer | Florida Solar Design Group</span><br style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px"><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">NABCEP Certified Solar Professional (PVIP)</span><br style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px"><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">Florida State Certified Solar Contractor CVC56956</span></div><div><font color="#333333" face="Roboto, RobotoDraft, Helvetica, Arial, sans-serif">Florida Certified Electrical Contractor EC13013208</font></div></div></div></div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Apr 23, 2024 at 5:47 PM Dave Angelini Offgrid Solar via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div style="font-size:12pt;font-family:Verdana,Geneva,sans-serif">
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<pre><span style="font-size:12pt">Not being helpful but I walk away from these. It will come back to you.</span> </pre>
<pre><strong><span style="font-size:small">Dave Angelini Offgrid Solar
"we go where powerlines don't"
<a href="http://members.sti.net/offgridsolar/" rel="noopener" target="_blank"> </a><a style="color:blue;font-size:11px;font-family:"Lucida Grande",Verdana,Arial,Helvetica,sans-serif;font-weight:400;background-color:rgb(255,255,255)" href="https://offgridsolar1.com/" rel="noopener noreferrer" target="_blank"><span style="font-size:12pt">https://offgridsolar1.com/</span></a><a href="http://members.sti.net/offgridsolar/" rel="noopener" target="_blank"> </a>
e-mail <a href="mailto:offgridsolar@sti.net" target="_blank">offgridsolar@sti.net</a>
text 209 813 0060</span></strong></pre>
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<p id="m_-6943205250108927316reply-intro">On 2024-04-23 2:40 pm, Jason Szumlanski via RE-wrenches wrote:</p>
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<div dir="auto">I have an off-grid client who is working on replacing old equipment at a cabin. He has a lot of 12 volt distribution in the house for lighting, fans, and a 12 volt refrigerator. He also has 120 volt AC loads that run through a separate distribution panel where the only source is a 2000 Watt Honda generator. There is no inverter present. The batteries are charged through a Trace C40.
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<div dir="auto">He currently has a few ancient solar panels and a struggling Bank of AGM batteries. It's time for an upgrade. I can easily supply enough PV power for what he needs. He currently has a 9 kilowatt hour battery capacity that he was happy with when the batteries operated optimally. Nonetheless, I would probably future-proof him with a 10 to 15 kilowatt hour LiPo to double or triple his usable capacity.<br>
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<div dir="auto">For convenience, obviously it would be nice to have an inverter to eliminate or reduce the generator requirement. But he seems committed to keeping his 12 volt distribution because it would be costly to replace fixtures. I think he would consider replacing the 12 volt refrigerator if he has an inverter. </div>
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<div dir="auto">He definitely wants LiPo batteries. </div>
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<div dir="auto">I don't like the idea of 12 volt direct from a battery plus connecting an inverter to that same battery. It is going to be hard to measure and monitor things. </div>
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<div dir="auto">I am thinking about using a 48 volt battery with a single phase 120 volt inverter, getting him to change to a 120 volt refrigerator, and using a DC converter to give him somewhere in the range of 100 amps at 12 volts for his existing DC lighting and fan loads. Is this a bad idea? Should I stick with a 12 volt battery system? He does have a tiny 12 volt pressure pump which might be an issue for the converter. I'm not sure. I am a bit worried about the efficiency loss and capacity of DC converters and not sure how to size it.</div>
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<div dir="auto">Jason Szumlanski </div>
<div dir="auto">Florida Solar Design Group </div>
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