In a nutshell you have what is a, "UPS" system right?
Just "tailored" to your rig's requirements. But your numbers are maybe off a bit. "Maybe"? Maybe not.
There is a rule used when using "any" inverters, UPS systems and etc.
That is;
"The UPS must be able to handle full load while also charging the battery system post an electrical outage".
I understand the terminology is incorrect for this audio application. But everything else really is the same when designing what is really just a "mini-substation" for a home's audio system. "With an (Isolated-dedicated) grounding electrode" which is Not tied into the homes primary electrical system and/or grounding electrode. This grounding topology, "Which is designed to NOT cause any ground-loop effect, or other types of problems". This can be more than problematic if not done correctly.
So, there is a "way" to follow to do this correctly and in the best manner. And "they" account for most of what I have learned to account for. Except for one step that "I" insist on doing also. Which is using toroidal isolating transformers, Isolated for each circuit. Located near the device/s for use. And sometimes more than one per circuit! Thats a lot of copper! But soo worth it!
Is anyone here familiar with the "UPS" systems that use the really big concrete flywheels? Big like (800+Lbs.) for the flywheel itself? And with a dia. close to (4') and over 18" wide??
This type of "UPS", It looks like two large, full-sized fridges' put together. In total it weighs about (3000Lbs.). The flywheel is always turning. Powered normally off of the utility power. Not really spinning to fast. Maybe at (450) Rpm's.
But that was (20) years ago...
450 Rpm's? "Or so I thought". Now it's more like (36,000 Rpm's) with a (98%) power efficiency!
In this modern power topology. The way I have used these systems....
And I post this so that maybe this will shed some light on what is going on as far as this goes. Hopefully this helps some of you.
But this is the future. As in, The "immediate" future for all homes. And this at a "100% install level" and this is coming very, very fast. You have to admit that our infrastructure is a mess and the only way to guarantee good, reliable and clean power? At least for twenty years or so? Starts with an "UPS", which is expandable until you are off grid as needed. "Like adding modules", easy!
The way this works is: "And this is JUST my exp. with it". My home is a bit different like I said above with the grounding and isolation but other than that? The same.
If you have not tried this? You will never understand the benefits. My PC's run better and last longer. No more hard-drive failures. Lighting almost never has to be changed out, "bulbs etc.". And if it has electronic components? It works better and much longer! And my 'rig' has never sounded better!
I use a "Battery-Free" system. "Yes", they exist.
But, this is how a typical system works. This is like those I saw and also worked with all the time before I retired. And can be purchased "used" now. "They all look new because they were always kept in those IT closets and other such places".
"You may need to change out some bearings and batteries. But after that? Another (20) years of use, and more is left in them.
So,
ALL power in a given area goes through the "UPS" system. Which on an avg. day has a load of maybe 50X the avg. American household. The Idea is that (Any) disruption to the supply voltage has one of two ways that it is always supplying a "Nominal" voltage of clean power. "Low voltage situations are handled by this flywheel which picks up the entire load using the kinetic energy as DC and also inverting to AC any other voltages as needed. In "Over-Voltage" situations, it just switches to battery power. Either internal or external. And as it is being transferred over to the "UPS" batteries OR, flywheel. Once the auto-transfer switches have all engaged and pulled over. The "UPS" then goes to all battery power. But, this shuts down anything deemed, "Non-critical", So basically anything that is not a computer or cooling and ventilation plus fire-safety is shut down because the transfer switches simply do not feed it. .
And the only batteries this system uses. Which for that (good sized) power load take up only about the same room or less than a medium sized fridge. They are only rated for the avg. load "Remember that is explicitly, computers, servers, routers and etcetera", good for about (15) minutes. But the flywheels stored kinetic energy? Another two hours and thirty-eight minutes! :"The generators are supposed to be up by then".
