<div dir="auto">Friends:</div><div dir="auto"><br></div><div dir="auto">As I see it there are three reasons to have this disconnecting means:</div><div dir="auto"><br></div><div dir="auto">1. Section 705 Code requirement. </div><div dir="auto">2. Disconnecting for service. </div><div dir="auto">3. Rapid shutdown for first responders. </div><div dir="auto"><br></div><div dir="auto">It would be ideal if batteries with BMS systems had contact-closure triggered inhibit system. The capability is baked into the circuitry, I am sure. This would be far superior to heavy duty DC knife switches. I am discussing that with Deka for the Duration line. <br clear="all"><br>For first responders I have argued that the batteries that ultimately power fire alarms or fire pumps should not be disconnected, avoiding the requirement for reason 3 above. </div><div dir="auto"><br></div><div dir="auto">I suspect 100 amps may be an insufficient rating for your batteries if they have 80 amp disconnects and there are more than one. </div><div dir="auto"><br></div><div dir="auto">I would be arguing the breaker(s) on the inverter are sufficient. Is it possible to provide a lock-out on that breaker?</div><div dir="auto"><br></div><div dir="auto">Keep us posted. This could happen to any of us. <br clear="all"><div dir="auto"><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><br>William Miller<br>Miller Solar.com<br>805-438-5600<br><a href="http://www.millersolar.com">www.millersolar.com</a><br></div></div></div><div><br></div><div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Tue, Jul 29, 2025 at 9:24 AM MD Electric & 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-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)"><div dir="ltr"><div class="gmail_default" style="font-size:small">Correct, it does not have an external disconnect, but if you open the cover, each battery has it's own disconnect and the Sol-Ark has a battery disconnect. </div><div class="gmail_default" style="font-size:small">Looks like I'm in the market for a 100 amp rated outdoor, lockable DC rated knife switch.</div><div class="gmail_default" style="font-size:small">Mike</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Jul 29, 2025 at 9:16 AM jay <<a href="mailto:jay.peltz@gmail.com" target="_blank">jay.peltz@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)"><div>I had to look up that battery enclosure and if I understand correctly it does not have an external breaker/disconnect so yes the inspector is correct in the need for one if I understand.<div><br></div><div>jay<br><div><br></div><div><br><div><br></div><div><br><div><div><br><blockquote type="cite"><div>On Jul 29, 2025, at 10:09 AM, MD Electric & Solar <<a href="mailto:mdelectricsolar@gmail.com" target="_blank">mdelectricsolar@gmail.com</a>> wrote:</div><br><div><div dir="ltr"><div class="gmail_default" style="font-size:small">Here is the reference, attached.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Jul 29, 2025 at 8:49 AM jay <<a href="mailto:jay.peltz@gmail.com" target="_blank">jay.peltz@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)">I’ll let the code experts chime in, but I would ask for the code reference they are referring to.<br>
<br>
The only one I can think of has to do with if the batteries are on the other side of a wall.<br>
<br>
Thats as clean an install as they come<br>
<br>
jay<br>
<br>
<br>
<br>
> On Jul 29, 2025, at 9:43 AM, MDElectricSolar <<a href="mailto:mdelectricsolar@gmail.com" target="_blank">mdelectricsolar@gmail.com</a>> wrote:<br>
> <br>
> <image0.jpeg><br>
> Michael D Nelson<br>
> MD Electric & Solar, Inc.<br>
> 707-684-0064 mobile<br>
> 707-884-1862 office<br>
> <a href="http://www.mdelectricsolar.com/" rel="noreferrer" target="_blank">www.mdelectricsolar.com</a><br>
> <a href="http://www.facebook.com/mdelectricandsolar" rel="noreferrer" target="_blank">www.facebook.com/mdelectricandsolar</a><br>
> <br>
> <br>
>> On Jul 29, 2025, at 8:06 AM, Jay via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<br>
>> <br>
>> What is the layout of the equipment<br>
>> <br>
>> Are the batteries next to and therefore in sight of the inverter?<br>
>> <br>
>> Jay<br>
>> <br>
>>> On Jul 29, 2025, at 8:44 AM, MDElectricSolar via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<br>
>>> <br>
>>> Wrenches,<br>
>>> I have a building inspector in my county of Sonoma who has just told me that we need to install a rapid shutdown switch of some type between my LFZ battery bank and my Solark 15k inverter. He mentioned some type of knife switch within 5 feet of the equipment. I cannot find any reference to this requirement anywhere but he insists it is required. These batteries happen to be simplify or brakes and Stratton batteries and each battery has its own 80 amp breaker on the battery and the Solark has a battery disconnect switch built-in. We do have module level RSD which kills the solar output as well as the inverter output when the button is pushed. Does anyone have any experience with this or can they point me to the correct code section or what are others doing to comply with this requirement?<br>
>>> <br>
>>> <br>
>>> Michael D Nelson<br>
>>> MD Electric & Solar, Inc.<br>
>>> 707-684-0064 mobile<br>
>>> 707-884-1862 office<br>
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</blockquote></div><div><br clear="all"></div><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><span style="font-size:12.8px">Michael D Nelson</span><br></div><div><div><span style="background-color:rgb(255,255,255)">MD Electric & Solar Inc.</span></div><div><span style="background-color:rgb(255,255,255)">Office: 707-412-3181</span></div><div><span style="background-color:rgb(255,255,255)">Cell: 707-684-0064</span></div></div><div><a href="http://www.mdelectricsolar.com/" style="font-size:12.8px" target="_blank">www.mdelectricsolar.com</a><span style="background-color:rgb(255,255,255)"><br></span></div><div><span style="background-color:rgb(255,255,255)"><a href="http://www.facebook.com/mdelectricandsolar" target="_blank">www.facebook.com/mdelectricandsolar</a></span></div><div><br></div><div><br></div></div></div></div></div></div></div></div></div></div></div></div></div>
<span id="m_-3403808884391793705m_8120189522131703663cid:f_mdoqf8do0"><PRMD BLD_20250728_062230.pdf></span></div></blockquote></div><br></div></div></div></div></div></blockquote></div><div><br clear="all"></div><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><span style="font-size:12.8px">Michael D Nelson</span><br></div><div><div><span style="background-color:rgb(255,255,255)">MD Electric & Solar Inc.</span></div><div><span style="background-color:rgb(255,255,255)">Office: 707-412-3181</span></div><div><span style="background-color:rgb(255,255,255)">Cell: 707-684-0064</span></div></div><div><a href="http://www.mdelectricsolar.com/" style="font-size:12.8px" target="_blank">www.mdelectricsolar.com</a><span style="background-color:rgb(255,255,255)"><br></span></div><div><span style="background-color:rgb(255,255,255)"><a href="http://www.facebook.com/mdelectricandsolar" target="_blank">www.facebook.com/mdelectricandsolar</a></span></div><div><br></div><div><br></div></div></div></div></div></div></div></div></div></div></div></div></div>
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