After finishing the project, I tried to show my wife and she was like -

"so this keeps the basement from flooding"
"yes"
"ok, you don't need to bore me with the details"

then this community popped into my head XD

There have been projects that made me wish I still rented. Home ownership is constantly dealing with the last guys fuckups.

But if you live in one place long enough, eventually the "last guy" is just you and if you do the job right, the volume of fuckups decreases over time. Some people like renting because they don't want to deal with the maintenance. I like owning because it's mine, I can do what I want with it, and I don't have to put up with the "landlord special."

There’s a second one 10 ft away.

Since it's on the basement, make sure it's not "made in Briton"

Nothing against the British, it's an it crowd reference

Indeed they do. But I'm lazy. I'll explain:

The systems with the 12v backups only activate said backup when the main pump fails, typically due to a power outage. So if you live in an area with consistent power, the backup will hardly ever activate. Over time the backup atrophies due to never cycling and then when your main does fail, the backup is also dead too. Then you're fucked.

To fix this, they recommend going down and unplugging your main, and running a hose or something to your pit to test the backup every 12 months or so, making sure it works. But who wants to do that.

With my system, I have a pump alternator (silver box, bottom left in pic). So I have two primary pumps, and it flips between 'em. So each pump runs half as often as normal. If one pump fails, the alternator flips to the other one and triggers an alert. This alert emails me saying "yo something is fucked up with the pump", and from there I have to diagnose and fix it. But it's asynchronous and I don't have to worry about it until I get that email. Only thing I really need to check on an annual basis is the battery health, which is bluetooth'd to my phone.

If you're on city water that doesn't lose pressure during power outages they also make water powered sump pumps.

Yup, it's hard to see in the photo, but at the wall power I put a Southwire #41008.

It has a high joule rating, but the nice thing is that if a surge occurs and it fries the 41008, it cuts off power (i.e. system goes to battery) and it sounds an alarm like a smoke detector. So then you go down and either replace it or remove it to get wall power again.

I do know that surge protection in front of a pump is a highly debated topic among electricians, so YMMV

Ty friend, I will strive to be more dull <3

A UPS with that capacity would likely be 5-10x the cost of what OP built.

Having used LA batteries for years on watering and fencing, the day I discovered LFP batteries was a glorious day.

They last forever, they discharge down to nothing with no damage, you don't get corrosion on the terminals. You can't boil them, you don't need to check water level, they weigh half as much for the capacity.

Even though initially expensive, I calculated they're about a quarter of the cost over the long term than LA because of the cycle count and amount I need for the extended capacity. I get about 30-40% of a LA battery's capacity without doing lasting harm to it, with LFP I can abuse that thing all the way down until it's completely exhausted and it charges right back up again.

Only thing I have to watch is charging them below freezing, so I have to run them in an insulated and heated box in the winter.

It's AVD. Bro, do you know of consumer level F-500? That seems like pro shit you'd have to have a contractor install AFAIK lol.

Yessir, 'cause you know when I need to actually work on this thing...it'll be in the middle of a storm, when the power is out, and the water is rising in the pit, and I'll be stressed outta my gourd. So I'll need battery powered lights, and tools sitting right there, and instructions on how to connect and disconnect everything, so I don't actually have to think under pressure :D

I missed that, thanks for pointing it out.

I'll have to get my dad to do this at his place. He's on a well, water softener, and fancy septic tank, as well as sump and sewer being pumped up from basement level to ground level for removal.

The system looks impressive, but if he's not around in an emergency I would not know what pipe or valve does what.

I mentioned in another comment but I have two pumps and an alternator that swaps between them, so I'm not overtly concerned with pump failure, more-so power failure.

The siphon's are dope but yes wasn't an option. I was a professional plumber in a previous life, so yea, I'll be maintain this thing lol.

This is the first time I've heard of siphon jet backup pumps. That looks like a really great option and I wish I had known about those years ago when I put in my own battery backup.

I’ve done a lot of digging (pun intended) on pumps and if you wanna save some $, get a 1/3hp Little Giant at Menards. They’re full cast iron, they have a vertical float, and they’re under $200.

The all-in-ones are nice, but expensive. I specifically went with high quality (but individually purposed) components, to save some money and also make repairs and replacements easier & cheaper.

The inverter is an AIMS pure sine wave (not modified) rated to 2000w continuous and 4000w peak. I chose it so that I could safely throw any consumer sump pump rated for a 15amp receptacle at it without worry. If you're careful and considerate, you could downgrade to a 1500w/3000w or even 1000w/2000w inverter if you're positive the pumps won't exceed the limits (would work on smaller 1/3hp systems, etc).

The current setup handles my Zoeller M95 that peaks at 16.5A with ease.

Regarding monitoring, the white cables are ZWave devices, I have set up to measure current and power draw.

Link here

Oh you are so right...there's a reason the battery is 6.5 feet off the ground, and the frame is hanging from the joists with structural screws so nothing can get knocked over... kids man...yea, if they unplug all the stuff at the bottom, I'll get an email stating as much. And I've screwed everything to the board, so at least they won't be able to pull anything off.