Costco Wholesale has for their Members:
Ecoflow Delta Pro Ultra Whole-Home Power Solution (18 KWH Solution) for the prices listed.
Shipping is free.
Thanks to Community Member
gspfunk for finding this deal.
Available:- Ecoflow Delta Pro Ultra Whole-Home Power Solution (18 KWH Solution) $7999.99
- Ecoflow Delta Pro Ultra Whole-Home Power Solution w/ Panel (18 KWH Solution) $8999.99
Features:- Scalable 18 kWh Solution Provides Up to a Week of Essential Power Supply
- Exceptional 7200w Output Powers Most Household Appliances at 120v or 240v
- Super-fast Charge Up to 8800w by Combining Solar and AC
- Online Ups Ensures 0-ms Transfer Time, Offering Constant Protection for Sensitive Devices
- Long-lasting 10-year LFP Battery for Reliable Performance
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In retrospect, I might have chosen to go down a different path now that I know all of this, and am still debating returning it and replacing it with a DIY solar PV system, but it's not for the lack of quality but logistics for my particular house, and what I'm trying to achieve with it. Otherwise, it's an extraordinary device.
I tried using the 0 ms online UPS port to power my network & server stack directly, removing my normal UPS from the path, and few days later got a notice that the NAS had unexpectedly rebooted. Looked and found that the entire network & server stack had unexpectedly rebooted, meaning that the online UPS port briefly went offline for some reason. I've split the load across the online & standby ports to see if it happens again and so far it hasn't, so I don't know what caused it to happen. It might be load related, might be linked to the fact I was only using an online port & not the standby ports, or it might have been a one time thing due to some combination of those.
The other annoying point is that the scheduling for time of use/time shifting is half baked at best. It is only possible to create a single schedule, which doesn't sound bad but is extremely frustrating if you want to have different schedules on different days. In my case I need a M-F schedule, the days I have mixed on peak/off peak power rates, and then a Sat-Sun schedule when the entire day is off peak. That simply isn't possible to do. Creating the M-F schedule entry works, but then it is impossible to add another entry for Sat-Sun. With just the M-F schedule the system shifts to battery only mode on Saturday and only pulls from the AC input when the battery is drained to the configured minimum level. To make M-F work, and still have it use the AC input most of the time on Sat-Sun, I had to create a single entry that says I have a peak power charge every day. So even on the two days where I don't need to power shift I have to because I want to power shift the five other days.
Oh, and setting up as "time of use" had its own problems of running on battery even though the app dashboard said it was supposed to be charging the battery. Supposedly there was a bug about it using UTC instead of the local time zone, but I'm not sure that was what was happening. It might have been because when I finally left it alone for a day or so it did seem to finally sync up with what the dashboard said should be happening. At least mostly, since the same single schedule problem above exists and it still went into battery only mode.
Regarding hookup, I figure you can just install a standard transfer switch with interlock or a GenerLink. That would be the best way without the SHP2.
The Smart Home Panel 2 has some potential issues. If there's a problem with the relays, they're integrated, so you'd have to replace the entire panel. If you use a transfer switch with interlock, you can power everything (your main panel) through your Delta Pro Ultra and then connect the DPU to your service panel.
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A decent standby generator still costs about $7000 for the unit and doesn't offer nearly as many installation options as a battery unit.
The reality is that in 10 years, these batteries are only going to get cheaper, while your generator won't.
Ideally, you'd run both instead of pitting one against the other.
2 sec Google search shows that it must exceed 3kWh!
I looked at the Costco 12kWh price and this 18kWh and with the $ off don't know why many would go for the 12kWh. That said the 6kWh would be the most useful for me with our TOU rates but the problem is all the costs it takes to hook it up unless you're good with all that... Am definitely happy to see the prices come down on these as Tesla just seems to keep on raising theirs while we all know batteries have come down in price a lot over the past several years!!
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Do you replace your generator at the end of it's warranty? How about your car or appliances? You cell phone or computer? If not, why would you think that this needs to be replaced once the warranty or lifecycle ends?
Do you run your gas generator 24/7 like this is designed to do? If so, how much is the fuel cost to run it 24/7 over 10 years? Enough to replace the batteries on this unit several times over I would think. If you ran your generator 24/7, do you think you wouldn't need any type of maintenance on it? Oil changes? Engine rebuilds? Fines due to constant noise complaints from nearby neighbors?
What happens during a catastrophe when diesel/propane is not available? It's less likely that we lose access to the sun than we are to have no access to diesel/gas/propane. Before you try to say how about when it rains/snows, I have solar panels on my roof and even during that last two years of heavy (for SoCal) rains, I never had a single day where I did not produce at least 10kWh of AC generated. That 10kWh only occurred once.
Not bad considering the ROI of other home projects is typically in the 5-10 year window
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Your way of thinking is a bit short sighted. Also, not everything is about ROI. Ask the victims of natural disasters how much they would be willing to spend to not have had to live without electricity in sweltering heat and humidity or frigid nights for weeks at a time. Forget about creature comforts like temperature control. What if you or a family member have life sustaining medical equipment that needs electricity to function?
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