I hope that some day there will emerge power stations that are meant to be user servicable. For instance, in the lesser case of rack batteries, the SOK 48V 100Ah Server Rack Battery could serve as an example. Extending the idea from that to a power station, the idea would be that any module that’s deemed to have high probabilty of failure could be easily replaced, rather than scrapping the entire powerstation. In that sense, it would be similar to how you repair a car: you replace the parts that need replacing. You don’t throw away the entire car if the problem is just a few easily replaced parts within the car.
Right now the only options I know of that even approximate that are all DIY.
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.
I think you’ll find the Filax 2 is slow compared to a UPS.
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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.
For a transfer switch? No. I need to build a “super UPS” and I’m either going to use a victron or an AIMS inverter. Since I might be feeding it from a home generator the victon has some advantages.
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.
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