<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div>William,</div><div><br data-mce-bogus="1"></div><div> Assuming the 12KW generator has 240 volt output, run the 240V through a transformer and double your 120 volt amps. I guess if you have a spare OB 3648 in the boneyard then you would be saving the cost of a transformer.</div><div><br data-mce-bogus="1"></div><div>Bill</div><div><br data-mce-bogus="1"></div><div> <!--StartFragment--><pre>Feather River Solar Electric<br>Bill Battagin, owner<br>4291 Nelson St. (Freight)<br>5575 Genesee Rd. (USPS, UPS)<br>Taylorsville, CA 95983<br>530-284-7849, 258-1641(cell)<br>CA. C10 Lic # 874049<br>Solar Powered since 1982</pre><!--EndFragment--> </div><div><br></div><hr id="zwchr" data-marker="__DIVIDER__"><div data-marker="__HEADERS__"><b>From: </b>"Jay via RE-wrenches" <re-wrenches@lists.re-wrenches.org><br><b>To: </b>william@millersolar.com, "RE-wrenches" <re-wrenches@lists.re-wrenches.org><br><b>Cc: </b>"Jay" <jay.peltz@gmail.com><br><b>Sent: </b>Friday, November 28, 2025 11:31:50 AM<br><b>Subject: </b>Re: [RE-wrenches] FX Inverter as a dumb charger<br></div><div><br></div><div data-marker="__QUOTED_TEXT__"><div dir="ltr"></div><div dir="ltr">Hi william</div><div dir="ltr"><br></div><div dir="ltr">Yes I’ve done it many times without issues </div><div dir="ltr"><br><blockquote>On Nov 28, 2025, at 11:41 AM, William Miller via RE-wrenches <re-wrenches@lists.re-wrenches.org> wrote:<br><br></blockquote></div><blockquote><div dir="ltr"><div dir="auto">Friends:</div><div dir="auto"><br></div><div dir="auto">One of my clients has one VFXR3648A inverter connected to 8 L16 batteries. We upgraded their generator to 12 kW. </div><div dir="auto"><br></div><div dir="auto">One leg of the generator is unloaded and the batteries can accept twice the charge current one FX can provide. It seems another inverter is called for. </div><div dir="auto"><br></div><div dir="auto">I have several functional VFXR3648 inverters on the shelf. I know I can not mix versions of the inverter in the hub. Could I connect a VFX3648 to the unused generator leg and battery bank but not the hub as a ‘dumb’ charger? I would plug in a Mate just long enough to verify settings. </div><div dir="auto"><br></div><div dir="auto">Has anyone tried this? Thanks in advance for any advice. <br clear="all"><br><div dir="auto"><div dir="ltr" class="gmail_signature">William Miller<br>Miller Solar.com<br>805-438-5600<br><a href="http://www.millersolar.com" target="_blank" rel="nofollow noopener noreferrer">www.millersolar.com</a><br></div></div></div>
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