Thanks, Lou. I missed that 6" bottom spacing requirement in the manual. That could explain a lot of the installation pictures I have seen.
On the flip side, we have seen some examples of installations in this thread without this 6-inch spacing, presumably without any adverse effects. Obviously, NEC requires that we follow the manufacturer's instructions, but for practical purposes or non-NEC installations, I wonder if this bottom spacing is necessary. Perhaps the manufacturer could provide a letter of exception. I might have to reach out to them. The manual seems to indicate the heat dissipation is "from bottom to top," so I'm not sure how critical the intake air spacing really is. I wouldn't want to put anything less than 6 inches above, but perhaps below isn't as critical. My situation is that I want to put a 12x12 gutter above some HomeGrid stacks and the inverters over the gutter. Based on my calculations, if I use more than 2 inches of space between the gutter and inverter, I will exceed the working height limit for the breakers in the inverters. Yes, I am aware of the depth difference between equipment and that will be addressed to meet working space requirements. My technical problem is only the NEC 240.24(A) height limit. Jason Szumlanski Principal Solar Designer | Florida Solar Design Group NABCEP Certified Solar Professional (PVIP) Florida State Certified Solar Contractor CVC56956 On Thu, Aug 3, 2023 at 6:41 PM Lou Russo via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > Hello All, > > Super impressive install, Michael. Almost worth a flight, and a site > visit! Back to Jason's initial question.... > > If you are using the 15kW Outdoor Sol-Ark they vent from the top and > bottom with a required 6" minimum spacing on both the top and bottom. > > A 12kW Outdoor with 8x8 gutter and 1" offset nipples have worked great for > us. > > Aloha, > > Lou Russo > (808) 345 6762 > > > > On Thu, Aug 3, 2023 at 7:09 AM Michael Morningstar via RE-wrenches < > re-wrenches@lists.re-wrenches.org> wrote: > >> Hi Drake, >> Those are single phase combiner panels. I would have loved to set this up >> as a three phase system, but there was already a mile of underground single >> phase run throughout the property. We ended up running a half mile 15KV >> line from the power site to the estate. This is an aside, it's kind of hard >> to see, but for seperation, we attached the pv circuits to the back of the >> gutter using through bolted adhesive backed cable tie holders. Often we use >> gutter dividers. They originate in the tall cabinet at the end which houses >> controls, secondary PV disconnects, AC and DC egauges, Tigo hub, Battery >> hub and (Lynk II). On the opposite end is a similar cabinet for the >> collection and distribution of AC circuits. Also, above and below the >> batteries are small gutters for communications and CT wires that run from >> the transfer switches to eguage. One transfer switch to alternate usage >> (alternating relay) or bypass between Gen 1 and Gen 2, and the other switch >> to select inverter or generator power, locally or remotely. In the AC >> cabinet there is a 400a contactor and time delay relay to achieve a >> generator cooldown as the janky Sol-Arks don't do that and it's hell on new >> diesels not to have that function. >> >> On Thu, Aug 3, 2023 at 7:50 AM Drake Chamberlin via RE-wrenches < >> re-wrenches@lists.re-wrenches.org> wrote: >> >>> That looks really nice. How were you able to put 8 Sol Arc inverters on >>> a 3 phase panel? Tech support told me that inverters had to be connected in >>> groups of 3. >>> >>> Thank you, >>> >>> Drake >>> >>> >>> *Drake Chamberlin* >>> >>> *Athens Electric LLC* >>> >>> *Ohio Electrical Contractor’s License 44810* >>> >>> *CO Master Electrician’s License 4526* >>> >>> *NABCEP Certified PV Installation Professional* >>> --- >>> >>> >>> >>> On 2023-08-02 14:19, Michael Morningstar via RE-wrenches wrote: >>> >>> 10x10 gutter. Notice within, a 2.5x2.5 gutter for comms. 1 x 2.5" >>> nipples work well. Chase nipples wont due to door clearance. I've also cut >>> the bottoms out of the Sol-Arks and a corresponding square window in the >>> gutter, placed a 1/4" rubber gasket between the two. We do that when we >>> have many VFD's over a gutter. Someone a while ago asked for a picture >>> showing how we make long bussbars. This one is 24' long. >>> >>> On Wed, Aug 2, 2023 at 10:08 AM Jerry Shafer via RE-wrenches < >>> re-wrenches@lists.re-wrenches.org> wrote: >>> >>> Jason >>> In plenty of applications l will use couplers with chase nipples, height >>> is one issue but installed working height is very important. I use a 8"x8"x >>> X gutter and sometimes even off set that from the wall, l have had AHJ not >>> want to see mixed cables LVDC and AC in the same conduit so pass through >>> the battery conductors right out the bottom and to the battery. I just >>> create a template for punching into the gutter, looks clean and is safe >>> with easy access to the display >>> Fun times >>> >>> On Wed, Aug 2, 2023, 8:04 AM Jason Szumlanski via RE-wrenches < >>> re-wrenches@lists.re-wrenches.org> wrote: >>> >>> I see a lot of pictures with conduit nipples coming out of a gutter that >>> are fairly long. I have a height limit issue and I'm wondering if there are >>> any negative implications of using very short nipples between a wireway >>> below and the inverter. I'm thinking about using close nipples or perhaps >>> 2-in nipples if I have enough room. >>> >>> If there are any practical reasons that this will not work well, please >>> let me know. >>> >>> Jason Szumlanski >>> Florida Solar Design Group >>> _______________________________________________ >>> >>> >>> -- >>> >>>
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