Have you heard of the “Right to Repair” movement, along with various associated lawsuits.? Manufacturers are vigorously trying to stop people from working on their own stuff. Right to Repair is owners fighting back.
it would be similar to how you repair a car: you replace the parts that need replacing.
Yeah, I’ve heard of it. They seem to be losing. I think that in principle the market is big enough it can support both approaches.
In the simpler case of lifepo4 battery manufacturers, it’s clear that 99% of them want those battery cases sealed shut and the case never opened. And in many instances the true reason is they don’t want you to see that you were scammed with used cells or shoddy workmanship or outright lies about the BMS capability. If you don’t believe it, check out: https://www.youtube.com/@iceholepower8012/videos
and it will make the hair on the back of your neck snap to attention. In it an electronics technican tears down and tests lifepo4 batteries from a whole host of different brands, and he proves that nearly all of them are seriously deficient.
It’s shenanigans like that which provide additional motivation for some people to DIY their own system.
@designrama If you were to DIY your own solution (and I’m not saying you should), but I notice that there does exist a category of inverter known as, roughly, “ups inverter with ultra high speed transfer switch” that would do nearly all the heavy lifting even just by itself. Alternatively victron has an ultra high speed transfer switch, called the Filax 2, that could be added external to an inverter.
Because of your specific concern about brownouts, though, a simple, straightforward double-conversion topology may be the way to go, if only because it could handle any conceivable brownout with ease.
Anyhow, please do let us know how it goes for you and what product/solution you end up settling on, and whether you’re happy with it or not.
Do you have any specific recommendations? I suppose I could someday be in the market for one as well.
Sometime in the last month I remember encountering a UPS inverter for sale on some website which had a claimed 5ms transfer time, but I can’t seem to find it again.
A quick update. EcoFlow support sent me return box and scheduled a pick up as my local FedEx center wouldn’t accept it due to the size of battery. That’s a much better customer service.
There was a one minute power outage. I don’t know if it was a blackout or brownout, but Bluetti AC180 worked properly. All three printers were printing at the time, they weren’t interrupted when power went out and then came back on. 
Hopefully the Delta2 replacement will works the same.
Take a moment to look at the Anker Solix units. I only have a 1000 but I’ve fond it great for the H2S. Could probably have the P1S on it as well.
Yeah, I have v1 of that unit, and it only choked on me one or two times when connected to the H2D. I think the reason is that v1 was meant to report an overload if the passthrough power was greater than 1440w. It just mostly failed to do that (which in my case, those failures to register an overload was a feature, not a bug). In v2, released in 2025, the threshhold was raised to 1800w, which should fix the issue. Same with the DJI unit v1 vs v2, except that DJI v1 always threw the error and shutdown when fast heating the H2D’s heated bed, whereas it happened only the couple random times on the Solix C1000 v1. So, if you have Solix C1000 v2, then afaik, you should be golden, at least on that particular issue. If I could trade my v1 in for a v2, I would, but that opportunity does not exist.
Pecron E3600LFP and E1500LFP are both pretty damn sweet too, if you’re lookin around. Great value, expandable, The app sucks but I dont use my phone anyways, lol
E3600 in specific is punching way above its weight class, at $1k on promo. Extra pre-engineered 3kwh batt packs $700. Everything still liftable by mere mortals
It would be nice if these “power stations” were sold as a stack of easily plugged together modules, such that you could upgrade or replace any particular module far into the future. Never seen one like that though. The closest to that would be a DIY build. Instead, if there’s one point of failure in one of the “packaged” powered stations, it’s probably just “game over” and retire the entire thing, unless maybe it’s still under warranty. But even then you’d be out of pocket while the warranty repair work is done–and who knows how long that might take anyway–so how viable is that warranty really, especially if you have to shoulder the burden of shipping it back as a “hazardous material”, and incur the extra costs associated with that, in addition to the already high costs of shipping a heavy item, which is what you may be facing.
I’m just a naive doe out in the world that plans on just trusting the 5 year warranty and scrambling if it’s needed.
All jokes aside, I’ve got a 200 and 521 that have never let us down during power outages, although they’re not cranking a lot of power. One for the USB devices, mainly phones. The other powers small things too, lights etc.
EDIT: The v1 goes for a hundred more. I’m guessing because you can link a battery to it? Really only thing I see that would command the extra money.