Advise on setup from a newbie

I'm completely new to solar and started researching it seriously a few months ago. I live in Texas and experienced several days without any power and it made me realize I need to have some sort of backup. I'm currently in the process of building a detached garage a good distance from my house and it is on top of extremely hard rock. I decided it would be a perfect time to do a off grid setup for the garage and run all power to the garage via my solar. I dove right in and started researching and ordering my products. I'm going to be using the new Renogy all in 1 inverter shown below.


I also went with a Bigbattery 48V Lama 5.3kw battery to connect to it. I have a local wholesale solar supplier I'm going to be getting my panels and railing from. I'm going to be getting 6 345w panels rated at 40voc a piece. The idea is to run 2 sets of 3 in parallel for the voltage sake of the generator. Now my question...

I realize that I may need some power optimizers because one of the panels may have shade at certain times depending. I was looking at getting the solar edge power optimizer, however will this work with any inverter or do they need to be a Solar Edge inverter to work? I can't really find any details researching that question. Any the other question is do you recommend running power optimizers or is it not necessary, and if so what does everyone like to use for off-grid setups? Hopefully I'm on the right track with building a setup. The idea is to be able to plug into the garage with outlets from the house if I need do for lights or powering a fridge.

With panels wired 3s2p, if one panel has partial shade (and assuming it has two diode-bypassed sections), one string has 6 halves illuminated and the other has 5 halves illuminated. Possibly little power lost (power/voltage curves still perform well at same voltage) and you get 5.5 panels worth of power.

If one panel fully shaded, that is 6 halves vs. 4 halves illuminated (or 3 whole panels vs. 2 whole panels) and power output might be reduced to 3 or if you're lucky 4 panels, probably less than 5 panels worth.

Given cost of optimizers and cost of panels (hope you're buying cheap/used like many forum members), hardly worth getting optimizers. How many hours will it be shaded? Are those peak-production hours?

The one that will be shaded - can you tilt it away from the shade so it gets more hours of full sun? If so, tilt the other two in that string of 3 the same way.

Thanks for your reply, it would probably be just 1 panel shaded at most. I actually just came across the Tigo optimizers after my post mentioned and it was the first time I had heard of them. I can probably trim some of the trees to help with the shade or position it better on the new roof. Its not a huge extra cost if it will benefit me. I have quite a bit of sun as it is, from about 9am to pretty late in the day. So with 2000w and just a 5300w battery it could be filled pretty quick but I may add another one of those batteries in the future. I'm actually getting the Mission Solar panels locally for just $175 a piece. The local solar supply store can even deliver everything for free including the long rails which is nice. I also read that with Tigo I can run those just on specific panels that may be shaded so I might go that route. But I thought having 6 of them would be good for the monitoring.

Something tells me that a Tigo (or any other) optimizer on one panel that gets shaded won't do anything at all.
Can't get blood from a stone, or boost power that isn't there.

What an optimizer can do is, when connected to a panel oriented differently, convert the available high voltage low current to lower voltage higher current allowing series connected panels to pass their higher current through. It matches panel output in a string.

Maybe optimizers on the two un-shaded panels would work.

The idea I like best is the one I gave of tilting it (and the other two in series) differently. You say sun from 9:00 AM to late on the array. What hours would the one be shaded? Most of a panel's output will be in a 6 hour window; beyond that, sun's angle hits it as < 45 degrees. If shade was 9:00 AM to Noon, you could tilt those three panels orthogonal to 3:00 PM sun so they get good light from Noon to 6:00 PM.

I think I should be able to cut out some of the tree limbs when I do my install to help with shading. I'm actually going to return my Renogy unit, I would rather go with a Growatt or MPP. I'm considering the 3kw Growatt, I'm not sure if you have any advise on what you prefer between the two. They seem to be more flexible for expansion later. I was considering the 6kw Growatt too but I read on watts 24/7 my battery may not meet the minimum for that.

I don't have experience with any of those units, but you'll find mention of them on this forum. Also SolArk.
I use SMA, which is very good. Other members use Victron, Outback, or Schneider. All more expensive than the models you're looking at, but good for larger installations like a house or workshop.

My battery is 1/3 or 1/4 the size recommended for my amount of PV (but meets the minimum for my amount of battery inverter) and it has been fine.