<p>See screen shot. The external is sold by Schneider but you can also obtain them.</p>
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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/" target="_blank">http://members.sti.net/offgridsolar/</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>On Tue, 21 Apr 2020 09:39:19 -0700, Jerry Shafer <jerrysgarage01@gmail.com> wrote:</p>
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<div dir="auto">Wrenches, Jason
<div dir="auto">I have done this when l dont want tranfer switch operation but you are looking for 400 amps at 51vdc that around 20 kW of charger. l used golf cart chargers but you may want to consider a forklift charger, they are quick and basic, the BMS/U will manage the charge rates anyway. I would run everything through a shunt for monitoring either through the box or via an eguage and DC shunts. You should be able to let the inverter turn on genny but programmed as a DC charger not AC at least with Outback we can do that. Fun times</div>
<div dir="auto">Jerry </div>
<div dir="auto">NABCEP PV Inspector </div>
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<div class="gmail_attr" dir="ltr">On Tue, Apr 21, 2020, 5:28 AM Jason Szumlanski <<a href="mailto:jason@floridasolardesigngroup.com">jason@floridasolardesigngroup.com</a>> wrote:</div>
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<div class="gmail_default" style="font-family: arial,helvetica,sans-serif;">I actually need 400Adc at 51V nominal of total charge rate. I was hoping to use 100Adc chargers for redundancy, or some combination of 2-8 chargers to reach the needed current, assuming they can be synced up. I don't think the charging algorithm needs to be complicated. We are basically bulk charging the LiPOs to 80% with the battery BMS controlling the generator. The concept is to get to 80% sometime in the night and solar kicks in during the day to reach 100% using 2-stage charging from the XW charge controllers.</div>
<div class="gmail_default" style="font-family: arial,helvetica,sans-serif;"> </div>
<div class="gmail_default" style="font-family: arial,helvetica,sans-serif;">The problem I have is the quad XW6048s in the system run at a pretty good load typically... often over 50%. This is off-grid with generator backup. The transfer switches in the XW6048 are causing surges and brownouts when the switched loads are high, especially smart dimmers and televisions. I need seamless power for this client. My thought is to abandon the internal chargers in the XW6048s and just run loads off inverter power full-time. I would charge the batteries with external battery chargers. The tricky part is how to adjust the charge rate based on load, and also based on solar input. I need to limit the net charging current. Of course, I still need 400Adc of charging current, which I'm learning might be hard to find. I don't really want to buy four more XWs - that's a pretty expensive solution. </div>
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<div class="gmail_default" style="font-family: arial,helvetica,sans-serif;">Jason Szumlanski</div>
<div class="gmail_default" style="font-family: arial,helvetica,sans-serif;">Florida Solar Design Group</div>
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<div class="gmail_attr" dir="ltr">On Fri, Apr 17, 2020 at 4:26 PM Dave Angelini Offgrid Solar <<a href="mailto:offgridsolar@sti.net">offgridsolar@sti.net</a>> wrote:</div>
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<p>I use the CSW 4048. It has a 50 amp charger. A good spare for clients. Get 2 of them. Repurpose an old Radian or XW well over 100A. XW+ is 140adc.</p>
<p><strong><span style="font-size: small;">Dave Angelini Offgrid Solar</span></strong></p>
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<pre><strong><span style="font-size: small;">"we go where powerlines don't"
<a href="https://mailtrack.io/trace/link/818d0fc14d35240172dc7b5e76e9b358639d0699?url=http%3A%2F%2Fmembers.sti.net%2Foffgridsolar%2F&userId=1613865&signature=a20ca8855bc640ef">http://members.sti.net/offgridsolar/</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>On Fri, 17 Apr 2020 14:21:14 -0400, Jason Szumlanski <<a href="mailto:jason@floridasolardesigngroup.com">jason@floridasolardesigngroup.com</a>> wrote:</p>
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<div dir="auto">I'm looking for a standalone 51V nominal battery charger suitable for a LiPO battery with 2-stage charging and adjustable setpoints for max current and battery voltage. It would require dual chargers with 100A capacity (I want dual chargers for redundancy so I have at least 50% capacity if one goes bad). Ideally they would sync up so they change stages simultaneously, but I'm not sure if that's really important.
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<div dir="auto">Who makes something like that?</div>
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<div dir="auto">Jason Szumlanski</div>
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