Bradley:
Is he shunt trip breaker UL rated? If not, it’s not an option. William Miller Solar 17395 Oak Road, Atascadero, CA 93422 805-438-5600 www.millersolar.com CA Lic. 773985 *From:* RE-wrenches [mailto:[email protected]] *On Behalf Of *Bradley Bassett via RE-wrenches *Sent:* Tuesday, July 29, 2025 3:31 PM *To:* RE-wrenches *Cc:* Bradley Bassett *Subject:* Re: [RE-wrenches] Battery RSD What I used to specify for exterior disconnect for a battery bank was the MidNite MNLBC-W250. I believe you can connect larger battery cables to input and output bypassing the smaller busbar input. https://www.midnitesolar.com/productPhoto.php?product_ID=687&productCat_ID=9&sortOrder=1&act=p If rapid shutdown is also required you can substitute the breaker with a remote trip version for the main 250A breaker. It needs a 24VDC signal to trip and is manually reset so it's not ideal, but costs far less than a true DC rated disconnect. However, it seems to me, agreeing with others here, that it should not be required in this case, that the breaker in the inverter should suffice. Brad Bassett
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