The largest we've done is a 4 stack of 8k Radians and a 6 stack of Sunny Islands with the Mutlicluster box. They both have worked fine and there are advantages to each approach.
An advantage to a multicluster approach is that you can have smaller and segmented battery banks that don't require custom DC bussing. Each cluster master manages the battery bank. The solar input can go straight into the multicluster box since AC coupling works very well with SMA equipment. Things get very busy with a Radian system quickly. We had to use a custom bussing system to combine the battery banks at around 1500A and miles of 4/0 cable to feed more bussing for the solar input and Radian connection. Regarding getting the AC in and out of the Radian, we opted to use dedicated panelboards for both the input and the output with double pole 60A breakers feeding in and out of each Radian. It's also a good idea to have a bypass switch upstream of the AC input panelboard that can bypass the system if needed. Both of these systems worked well but took a lot of planning for the spatial layout and took a lot of wall space, much more than we initially thought. Good Luck and let us know which approach you take. On Wed, Sep 9, 2020 at 10:20 PM frenergy <[email protected]> wrote: > OK, I'll bite. I use SMA and Outback almost exclusively. SMA for > grid-tie so I can't vouch for SI for Off-grid and I don't seem to have the > same wait problem with SMA, its usually 10-20 minutes. > > And Outback.... well they're not perfect but I've been using > there stuff since day 1 (thanks Bob-O), still using FX3524 ser# 0007 and > been installing since they were Trace. Service? well, let's just say it > varies but I've been willing to put up with it. The WORST part of of > Outback service calls is the music they pipe in on 'hold'...its enough to > make you hang up. > > Sol-ark, the new kid on the block sounds slick and I'm > genuinely tempted, specs look great..wonder what their 'hold' music is like? > > Bill > > Feather River Solar Electric > Bill Battagin, Owner > 4291 Nelson St. > Taylorsville, CA 95983 > 530.284.7849 > CA Lic 874049www.frenergy.net > > On 9/9/2020 6:49 PM, Mark Frye wrote: > > The most important thing here is that no one is standing up to sing the > praises of either SMA or Outback. > > I myself have sent about 2 hours on hold over 2 days trying to get an > issue addressed by SMA. > > Re: Sol-Arc I would pay a lot extra or take some not so good aspect in > exchange for good technical support. > On 9/9/2020 1:12 PM, Jason Szumlanski wrote: > > Any tips on combining AC output from these units when stacking several of > them? What bus/OCPD system are you using? Same question for generator/grid > input. > > The solar MPPT inputs appear to be dead simple. > > Jason Szumlanski > > > > > > > > > ------------------------------ > [image: Avast logo] <https://www.avast.com/antivirus> > > This email has been checked for viruses by Avast antivirus software. > www.avast.com <https://www.avast.com/antivirus> > > <#m_3055688145284475229_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > -- Mac Lewis *"Yo solo sé que no sé nada." -Sócrates*
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