RuiXU battery experiences

Brucey said:

Are these ok to use in vertical orientation - front face pointing up?

Click to expand...

Further to above.. They are not yet selling the floor or wall brackets. Maybe their support people can give us an idea when they may be available

After contacting support, apparently their API's are under NDA. Apparently they don't have a tool for any kind of monitoring. I asked support specifically about cabling to the EG4 18KPV/12 but received a rather non-descript answer. Since I'm not signing an NDA I'll try and reverse engineer something based on the Victron or EG4 published specs. I mean really, ... an NDA to talk to the BMS on a battery from a Chinese company that likely 'borrowed' the design to start with. . .

But it's a super-secret request for the current SOC on the batteries, nobody else has that... Good grief.

ksmithaz1 said:

After contacting support, apparently their API's are under NDA. Apparently they don't have a tool for any kind of monitoring. I asked support specifically about cabling to the EG4 18KPV/12 but received a rather non-descript answer. Since I'm not signing an NDA I'll try and reverse engineer something based on the Victron or EG4 published specs. I mean really, ... an NDA to talk to the BMS on a battery from a Chinese company that likely 'borrowed' the design to start with. . .

But it's a super-secret request for the current SOC on the batteries, nobody else has that... Good grief.

Click to expand...

How to wire RUiXU Server Rack battery RX-LFP48100 wtih Victron Multiplus -Ⅱ Inverter - - YouTube

Since the battery connects directly to the Victron CerboGX couldn't you see and set the battery options?

Thanks
Scat

jonas said:

Do you know the manufacturer and/or model of the battery connector?

Click to expand...

No I don't but , Will Prowse spoke about the cable on one of his reviews on the RUiXU Server Rack battery
maybe on Will's video here:
I really like that the BMS in this battery you set the BMS protocol for the invert you have.
It is in the manual here:
RUiXU youtube channel:

jonas said:

Do you know the manufacturer and/or model of the battery connector?

Click to expand...

It is the Amphenol SurLok system for HV connections.. or at least it looks like it. There are also some Chinese groups making the same type of single pole connector, Futronics for example (which is what AOLithium uses I suspect).

Can get them from digikey: https://www.digikey.com/en/products...ZX4AnAJYA7AOYgAvvMIsyIgK5iAMkQDWAAgAKmNdm7ygA

jonas said:

Thanks all helping me to find out what battery connector it uses.
Now if Ruixu support could be this helpful to let me know what it uses instead of just stop answering my emails when asking them.

Click to expand...

Did you try their technical support email or the sales email?

jonas said:

Waiting for them to reply to my request to get cables using AWG 2 instead of 4.

Click to expand...

I was just told in email that they do not have any inventory of 2 AWG cable.

Could anyone that has the batteries take some detailed pictures of the connectors? There are a lot of options, sealed, unsealed, etc.


If the picture shows a part number that would be ideal. I want to make some cables with 2/0 cable that I already have instead of using 4awg for a 100A battery.

jonas said:

As the manufacturer of the cable can’t do AWG 2 then I believe the plug they use is the 5.7mm that can maximum fit AWG 4.

Click to expand...

That is what I figured as well, and it would probably void the warranty to replace them. That really is too small for a battery BMS that can deliver 100A. Short leads of 4awg from the terminal to the bus bar in the rack would probably be okay, but I do not have a rack or bus bars.

xsnrg said:

That is what I figured as well, and it would probably void the warranty to replace them. That really is too small for a battery BMS that can deliver 100A. Short leads of 4awg from the terminal to the bus bar in the rack would probably be okay, but I do not have a rack or bus bars.

Click to expand...

100A (5KW) would probably be ok with #4 in free air, but you'd probably want it to be a short interval. A 100A capable battery is not normally designed to pump 100A sustained output. Most of these units are engineered for 50% duty (50A). You can run them higher, and most quote 150A for a short burst, but ideally they perform better at lower discharge rates.

ksmithaz1 said:

100A (5KW) would probably be ok with #4 in free air, but you'd probably want it to be a short interval. A 100A capable battery is not normally designed to pump 100A sustained output. Most of these units are engineered for 50% duty (50A). You can run them higher, and most quote 150A for a short burst, but ideally they perform better at lower discharge rates.

Click to expand...

While all that is true, engineering things safely doesn't care much about how it operates under normal conditions. You >could< use a 30A breaker on 14 gauge wire too, because normally, it would be just fine, but you and I both know we don't always have control over the load. Unfortunately, that makes it something to work around on an otherwise pretty solid looking battery system. Will know soon, one on order.

xsnrg said:

While all that is true, engineering things safely doesn't care much about how it operates under normal conditions. You >could< use a 30A breaker on 14 gauge wire too, because normally, it would be just fine, but you and I both know we don't always have control over the load. Unfortunately, that makes it something to work around on an otherwise pretty solid looking battery system. Will know soon, one on order.

Click to expand...

No, #14 in free air is only rated to 25A@60F. If you want to run a 30A breaker on 14awg in free air, you need to make sure everything is rated to 75C. 4AWG on the other hand is rated to 105 in free air with lower end connectors. Free air means it's not in a conduit or raceway, so a simple insulated cable from a battery rack to an inverter would be fine with #4 up to 100A, but you may get a noticeable drop in voltage if you run it too far. I'd keep it under 10 feet, and use the fine stranded welding cable unless you are clamping it where it doesn't ever move.

Sizing an inverter is no different than sizing a generator. A 5KW generator can put out 5KW, but if you actually need to draw 5KW for any length of time you probably want something like a 10KW generator. If you actually expect to draw 100A continuously, I would bump it, but neither would I run a 5KW inverter continuously at 5KW, so now I want 10KW and 200A off the batteries, and everything just goes up a notch. Figuring a 'normal' load at ~ 60% if you should be pulling ~60A @ 50V / 3000W. This is actually going to be a little high for the recommended sustained discharge rate on most single rack-mount 5KWH LP4 batteries, but should be fine and not degrade it more quickly.

I absolutely have control of my loads. That is what breakers and fuses are for. I also do not over-provision breakers/fuses. All the 4/0 from my batteries have 300A fuses, (4 conductors 2x2 to the DC bus bars) and the 1/0 from my bus to my two inverters (in pairs) is breaker'd at 150 each because I don't expect more than that to ever pass. If it does then something is happening I am not aware of and safeties need to blow. Also keep in mind a 300A fuse may not blow immediately with a sustained load up to 10% or even more over it's rated ampacity. Same for a breaker, and most can handle very short spikes over 150% of their rating.

Wires / breakers are sized for the expected draw, not the capacity of the source. Try and locate your breaker as close to the source as possible. Just because the battery itself may have a 150A breaker doesn't prevent you from putting a 100 or 80A inline as a sanity/safety check or cut-off point.

jonas said:

Thanks all helping me to find out what battery connector it uses.
Now if Ruixu support could be this helpful to let me know what it uses instead of just stop answering my emails when asking them.

Click to expand...

It's under the NDA...

I made the plunge. I ordered 6 Riuxu server batteries + a server rack. I was trying to decide between EG4 Lifepower and Riuxu. I made the decision when Riuxu lowered the price of each battery to $1199 for their Black Friday sale and free shipping. Total was $7753 for 6 batteries and a server rack. I placed the order Wednesday night. A rep from Riuxu said the trucking company will be picking it up from them on Monday. They are shipping from Southern CA and I am in Las Vegas NV (about 300 miles / 480km). I'll post some pictures when it shows up. I hope it gets here before Thanksgiving so that I have some time off to set it up over the weekend.

im doing the same
following

I was almost going to get the 10-battery rack (with 6 batteries) because I do plan on expanding later on. But considering how tall it would be and the weight of 10 batteries, I decided it would be better to stay with the smaller 6-battery rack. And when I do expand, I will get another 6-battery rack. I can't even imagine what might happen if a rack of 10 batteries tipped over (from a broken wheel, structural defect, or hit by a car in my garage).

Anyway, I got an update on tracking. Apparently Fedex is the carrier. I didn't know Fedex does LTL shipping. They are in possession of the shipment right now. It is 2 large packages on a pallet. Total weight is 925 lbs / 420 kg.

And it's here! First, some photos of how it came. I was very impressed with FedEx. No dents, no holes, no damage at all to the boxes. It's as if it just rolled off the factory floor right into my garage. The packaging for the batteries is really good. It's double boxed with lots of protection on every side.

Next, the unboxed rack. I guess I was too excited to open the boxes for the batteries that I forgot to take some pictures. ?

And now, after several hours, the finished product. I will get some proper sized cables and mount the inverter to the wall later this weekend.
The side panels come off too, but I don't know why anyone would ever want to take them off.