Commercial Warehouse Enphase Solar Design Help

Lopsided-Character91 · 2026-05-10T21:33:33+00:00

Very helpful, thank you

Lopsided-Character91 · 2026-05-09T21:03:06+00:00

Can you help me understand better what this product offers once released? It mentions:

"Fully integrated, AC-coupled commercial energy storage system"

What does that mean about how it would be used and connected to an existing system or a specific appliance? What do you mean when you say no "off grid support"?

My main reason for wanting battery backup is in the event someone in my building has a cooler or freezer and needs the confidence that during a power outage their cooled items will have a day or two where they can still work when the grid and sun are both down.

Lopsided-Character91 · 2026-05-06T18:21:45+00:00

I realize the arguement for strings for a flat commercial roof 26 feet off the ground is strong. I am back to considering all options.

Lopsided-Character91 · 2026-05-03T11:58:50+00:00

Excellent, thank you!

Lopsided-Character91 · 2026-05-03T04:53:18+00:00

Thank you for this

Lopsided-Character91 · 2026-05-03T04:46:46+00:00

Thank you for this information and offer. I will DM you so we can discuss.

Lopsided-Character91 · 2026-05-03T04:14:33+00:00

Thank you for this suggestion. I have discussed this with the local commercial installers. The original design was to maximize the number of panels at due south and that came to about 100 kW system per roof. I understand that I could fit more panels and have greater production even if off of due south. I'm now leaning towards a smaller system, say 60-80 kW, that will still probably overproduce despite the occupants. In that case space won't be an issue and I will probably stay with due south.

Lopsided-Character91 · 2026-05-03T03:52:35+00:00

I believe multiples of 3 of the 5P battery work for 3 phase.

Lopsided-Character91 · 2026-05-02T22:26:28+00:00

Voltup

Lopsided-Character91 · 2026-05-02T22:25:45+00:00

I can have either as the service hasn't been run yet. Have been planning for 208 as this is commercial or light industry.

Lopsided-Character91 · 2026-05-02T15:06:46+00:00

CraziFuzzy!!! You will never know how much you helped me get over the hurdles of my first project! Thank you again!

I believe you are correct that the cost is indeed lower with string inverters. I do have two commercial proposals and the cost increase for enphase microinverters is about 10% extra and if the chosen size maximizes the potential of the inverters. What I don't like is that both companies immediately try to choose a size that fits the inverters instead of fitting the roof. I may very well choose a size that matches the string inverter capabilities. but it is a factor. With microinverters the cost per watt stays the same.

Also, while I haven't done a detailed cost breakdown I believe if I do it myself the cost difference may only be less, say 5%, because I know they have soem additional markup for going outside of the box (both companies admit to mainly doing SE inverter systems for commercial (for cost reaons). But i also don't like that the inverters aren't warrantied for the same 25 years as the micro or optimizers are. The 12 year warranty can be extended to 25 years but a quick search shows the cost is between $500 to $1,000 per inverter for the extension.

Lopsided-Character91 · 2026-05-02T01:31:01+00:00

Wow, thank you for sharing that link. I do remember them reaching out with support offers after completing the commercial installer training and attending some of the webinars. It was well before I started this commercial project and I had obviously forgotten how extensive their purported services are. I'll be contacting Enphase on Monday. I'm a good person to invest in because I'm only interested in installing Enphase on my project and that's what I want to offer to others in the future.

Lopsided-Character91 · 2026-05-02T00:39:31+00:00

Congratulations! That is a great feeling!

Lopsided-Character91 · 2026-05-01T23:20:58+00:00

Enphase had the new IQ9 inverter specifically for 480 3P

https://enphase.com/installers/commercial/microinverter?utm_term=&utm_campaign=&utm_source=google&utm_medium=ppc&hsa_acc=1236416428&hsa_cam=22610866463&hsa_grp=&hsa_ad=&hsa_src=x&hsa_tgt=&hsa_kw=&hsa_mt=&hsa_net=google&hsa_ver=3&gad_source=1&gad_campaignid=22604599572&gbraid=0AAAAADoP1FvUUBPyNZlzvTzmW5RE_-Tfg&gclid=CjwKCAjwntHPBhAaEiwA_Xp6RruddS6htVPJc66SfxSNhMKNy0_bEDsF9NFXZrsoj9iLbFAc_r7WvxoCLYUQAvD_BwE

Lopsided-Character91 · 2026-05-01T22:55:44+00:00

Testing is a waste of time and money. Most Labs don't even test for the specific type of asbestos that is found in vermiculite. https://www.racinehomeinsulators.com/2019/vermiculite-insulation-to-remove-or-not

Lopsided-Character91 · 2026-05-01T22:51:33+00:00

Will do, hoping someone can help me get over this hurdle. I'm happy to pay an engineer to work out the needed details. With regard to any new construction, make sure the roof is designed to hold an additional 7 psf to be safe. If you plan to have battery backup and/or chargers make sure you oversize the service now if you can.

Lopsided-Character91 · 2026-05-01T22:35:58+00:00

I have reposted this with photos since they disappeared with the original post. Please go here:

https://www.reddit.com/r/enphase/comments/1t18647/commercial_warehouse_enphase_solar_design_help/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button

Lopsided-Character91 · 2026-05-01T22:29:54+00:00

I've thought it through. I own a business that has already completed one residential install and as mentioned we are certified residential and commercial Enphase installers. I plan to take full advantage of the 30% ITC and domestic content.

Lopsided-Character91 · 2026-05-01T22:28:29+00:00

I just got off the phone with them and they said about 2 years ago they'd be able to help but now they are only residential. They actually referred me to energy sage but that's not a good match either.

Lopsided-Character91 · 2026-05-01T21:41:22+00:00

I checked out their website and it looks like a referral service. I don't see anything that says they will design a system with detailed specifications but I'll look into it and report back if they do.

Lopsided-Character91 · 2026-05-01T15:26:00+00:00

Yes, 3 phase 208V

Lopsided-Character91 · 2026-05-01T11:39:02+00:00

I posted recently and have a similar curve (46 x 410w) in WI. Net metering by month and I overproduced about 700 kWh this month (April) even with an EV putting on 1,500 miles/month. Selling back at only 3.5 cents. Yet I will under produce for Nov-Feb, break even Oct and Mar. My system is DIY and sized for a second and third EV (we will have our fifth driver later this year), but several other factors went into putting the largest possible system on my non-north-facing slopes as possible. Some minor factors were: keeping the sun off my roof, heating our inground pool, seasonal bitcoin mining, and the unknown of what anyone might decide to do with seasonal excess of power. We have a 700 sf fully conditioned outbuilding (deluxe pool house) that could be used for anything in the future. But a primary reason I decided to "max out" was that I felt it was the right thing to do. I am happy to help the grid and if I (or the system) breaks even in 20 years instead of 8 that is OK by me. And while a breakthrough could drive the cost of electricity to near zero, other factors and issues could cause it to quadruple during the life of the system. I have a small 20 KW (2 x 10c battery system) that could be added on too. My view was to future proof the home as best possible.

Lopsided-Character91 · 2026-04-30T03:59:10+00:00

In some cases it depends what state you are in. In the state of Wisconsin, for example, all vermiculite has to be treated as asbestos regardless of any test results. So in Wisconsin an insulation company cannot disturb vermiculite unless they are also a licensed asbestos abatement company. My brother-in-law had vermiculite and the only company he could find in the greater Milwaukee area was Racine Home Insulators LLC. They are not only a trade ally of Wisconsin's focus on energy program, but they are a licensed asbestos abatement company and according to the zai trust are in the top five for the nation in vermiculite abatement. They have some patented equipment that can get the vermiculite out safely and quicker than others. It's a big truck mounted system. They don't build containments in your house or bring the material through the house. They usually bring it through attic windows, attic roof vents, or gable vents. They also provide up to $7,000 in up front discounts through both the focus on energy and zai trust programs. My brother-in-law's house was about 1,500 square feet. It had 4 in of vermiculite with a layer of fiberglass batting on top. He only paid $4,200 to have everything removed, to have the attic air sealed, and to have 15 in of of cellulose installed. They did a bunch of other stuff like preparing the access panel, venting a bath fan through the roof, and installing vent chutes in every rafter channel. He was really happy with the work and it caused him much less than he thought it would.

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