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<div id="signature">How about just buy an RV?</div>
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<div>Seriously the reason Jason I am Leary is because of the experiences I have had with what I call Offgrid Squalor. </div>
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<div>Just have to be careful especially these days of druggies, people in vans with no windows, ex paramilitary that went bad, </div>
<div>and you get the picture.</div>
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<div>If you know the person that is the way to keep you and your loved ones safe. Money does talk sometimes and the lack can of it</div>
<div>can be a warning.</div>
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<div>Also as mentioned, these types of situations, are what gets my accountant telling me if you do not charge enough,</div>
<div>no one will listen to your advice.<br />
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<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"> </a><a style="color: blue; font-size: 11px; font-family: 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif; font-weight: 400; background-color: #ffffff;" href="https://offgridsolar1.com/" rel="noopener noreferrer"><span style="font-size: 12pt;">https://offgridsolar1.com/</span></a><a href="http://members.sti.net/offgridsolar/" rel="noopener"> </a>
e-mail <a href="mailto:offgridsolar@sti.net">offgridsolar@sti.net</a>
text 209 813 0060</span></strong></pre>
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<p id="reply-intro">On 2024-04-24 10:51 am, John Blittersdorf via RE-wrenches wrote:</p>
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<div dir="ltr">Jason,
<div> Just using the converter works fine. They are considered a battery charger or a regulated power supply. I am currently running that way now with the battery cables going nowhere. I was thinking of putting the battery back in the system just for triple redundancy when my inverter hits low battery cutoff voltage on a cold winter night and no fuel for the generator (or it won't start).</div>
<div>My Iota DLS puts out a regulated 13.4 volts up to 30 amps. </div>
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<div>John</div>
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<div class="v1gmail_attr" dir="ltr">On Wed, Apr 24, 2024 at 8:25 AM Jason Szumlanski via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" rel="noreferrer">re-wrenches@lists.re-wrenches.org</a>> wrote:</div>
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<div class="v1gmail_default" style="font-family: arial,helvetica,sans-serif;">Ah ha! I didn't consider using a small 12V battery with a charger. I was thinking of just using a 120V -> 12V converter to handle the DC loads. Is the 12V battery really necessary, or can I just power the DC loads directly with a converter? If I just have lights and fans on the DC system, the load should be pretty minimal. </div>
<div class="v1gmail_default" style="font-family: arial,helvetica,sans-serif;"> </div>
<div class="v1gmail_default" style="font-family: arial,helvetica,sans-serif;">I could use a separate 12V battery, but I would like to eliminate that cost and complexity if possible.</div>
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<div class="v1gmail_default" style="font-family: arial,helvetica,sans-serif;"> </div>
<div class="v1gmail_default" style="font-family: arial,helvetica,sans-serif;">And yeah, I am not considering this a money making opportunity. It's really just a challenge to ward off boredom from the daily grind.</div>
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<div dir="ltr"><br />Jason Szumlanski
<div><span style="color: #333333; font-family: Roboto,RobotoDraft,Helvetica,Arial,sans-serif; font-size: 13px;">Principal Solar Designer | Florida Solar Design Group</span><br style="color: #333333; font-family: Roboto,RobotoDraft,Helvetica,Arial,sans-serif; font-size: 13px;" /><span style="color: #333333; font-family: Roboto,RobotoDraft,Helvetica,Arial,sans-serif; font-size: 13px;">NABCEP Certified Solar Professional (PVIP)</span><br style="color: #333333; font-family: Roboto,RobotoDraft,Helvetica,Arial,sans-serif; font-size: 13px;" /><span style="color: #333333; font-family: Roboto,RobotoDraft,Helvetica,Arial,sans-serif; font-size: 13px;">Florida State Certified Solar Contractor CVC56956</span></div>
<div><span style="color: #333333; font-family: Roboto, RobotoDraft, Helvetica, Arial, sans-serif;">Florida Certified Electrical Contractor EC13013208</span></div>
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<div class="v1gmail_attr" dir="ltr">On Wed, Apr 24, 2024 at 8:01 AM John Blittersdorf via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" rel="noreferrer">re-wrenches@lists.re-wrenches.org</a>> wrote:</div>
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<div dir="ltr">Jason,
<div> I have a customer with the same situation except he already has a 12 V VFX inverter, He has a sunfrost fridge and other small loads with a very fancy custom control board</div>
<div>originally set up to handle AC and DC systems. We are adding a lot more solar and I was considering a dual battery system but the owner didn't like that idea. We are going with and Iota 12v power supply (i use one at my house for my sunfrost) to power up all his DC loads and will be adding a large 48 V battery bank and over 4Kw of solar using a VFXR3648 directly in place of the 12V inverter. He complained that the existing inverter would not handle all his current AC loads very well. My own house is fully wired for 12VDC as well as AC (lots of #10 copper not being used) and I have been considering getting a small LFP 12V battery to put back on by DC System. Then use the Iota as a secondary charging method with some of my large stash of older modules hooked up for 12V direct with C40 charge controller to recreate my original system just for kicks. I'm only using DC for my Sunfrost and one "emergency light" in the livingroom right now. For your customer, a small LFP 12v battery (approximately $500 or less) to replace his old battery bankm and more larger ones for the new AC side with 48V inverter fed by his generator or through an Iota 48 V charger ifusing a smaller non charging inverter. Unlike Dave, I like these challenges. Maybe thats why I never seem to make money.!!</div>
<div> </div>
<div>John Blittersdorf</div>
<div><a href="http://offgridvermont.com" target="_blank" rel="noopener noreferrer">offgridvermont.com</a></div>
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<div class="v1gmail_attr" dir="ltr">On Wed, Apr 24, 2024 at 7:22 AM Jason Szumlanski via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" rel="noreferrer">re-wrenches@lists.re-wrenches.org</a>> wrote:</div>
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<div 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>
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<div class="v1gmail_signature" dir="ltr">
<div dir="ltr"><br />Jason Szumlanski
<div><span style="color: #333333; font-family: Roboto,RobotoDraft,Helvetica,Arial,sans-serif; font-size: 13px;">Principal Solar Designer | Florida Solar Design Group</span><br style="color: #333333; font-family: Roboto,RobotoDraft,Helvetica,Arial,sans-serif; font-size: 13px;" /><span style="color: #333333; font-family: Roboto,RobotoDraft,Helvetica,Arial,sans-serif; font-size: 13px;">NABCEP Certified Solar Professional (PVIP)</span><br style="color: #333333; font-family: Roboto,RobotoDraft,Helvetica,Arial,sans-serif; font-size: 13px;" /><span style="color: #333333; font-family: Roboto,RobotoDraft,Helvetica,Arial,sans-serif; font-size: 13px;">Florida State Certified Solar Contractor CVC56956</span></div>
<div><span style="color: #333333; font-family: Roboto, RobotoDraft, Helvetica, Arial, sans-serif;">Florida Certified Electrical Contractor EC13013208</span></div>
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<div class="v1gmail_attr" dir="ltr">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" rel="noreferrer">re-wrenches@lists.re-wrenches.org</a>> wrote:</div>
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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/" target="_blank" rel="noopener noreferrer"> </a><a style="color: blue; font-size: 11px; font-family: 'Lucida Grande',Verdana,Arial,Helvetica,sans-serif; font-weight: 400; background-color: #ffffff;" href="https://offgridsolar1.com/" target="_blank" rel="noopener noreferrer"><span style="font-size: 12pt;">https://offgridsolar1.com/</span></a><a href="http://members.sti.net/offgridsolar/" target="_blank" rel="noopener noreferrer"> </a>
e-mail <a href="mailto:offgridsolar@sti.net" rel="noreferrer">offgridsolar@sti.net</a>
text 209 813 0060</span></strong></pre>
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<p id="v1m_-3632450004042004009m_-1254246739971541766m_-8723228507450447887m_4357205162707039899m_-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.
<div dir="auto"> </div>
<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 />
<div dir="auto"> </div>
<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>
<div dir="auto"> </div>
<div dir="auto">He definitely wants LiPo batteries. </div>
<div dir="auto"> </div>
<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>
<div dir="auto"> </div>
<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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