Recent content by archjeb

It goes back to mains/service power once that returns. Regarding LiFePo4 charge profile...ya, you have to set to custom and tweak the charge profile through the CLI/serial interface. For now...I'm just using the GEL charge profile which keeps the voltages down to 14.4 so I shouldn't have a BMS...

@Crowz But..... That is just an inverter. Not an inverter/charger.

That is Exactly how the Cotek INverter/Charger works that I'm using. https://www.donrowe.com/cotek-sc1200-124-pure-sine-inverter-charger-p/sc1200-124.htm I would have considered going with a Victron, but they do NOT make a US version that runs on 24v in the wattage I was looking for. Cotek was...

24v 100Ah battery was $530 Inverter/charger was $649 60A breaker was $16 from Amazon Rack Shelf (rated weight of 110#) was $46 Plug ends & SO cable from Home Depot ~ $35 A few dollars for the wire and crimp rings/lugs from the local Marine Shop for the DC side. I have a hydraulic crimp, so I...

Alright, I've got the inverter/charger and 100Ah 24v LiFePo4 pack sitting in the rack. Its been running for a couple weeks now and its working great! Ended up using the following battery: Of course did a full battery capacity test beforehand - it was a little over 101Ah. I still need to...

In post #30, I was actually able to get it on the bench and figure it out. I decided to go down the Inverter/Charger path. Its on order. Will report how it goes after I get it on the bench and test it.

I'm going to give the Cotek inverter/charger a shot. Just got off the phone with them. Looks like it will work just fine. the RJ12 has RS232 pins and I can easily write an interface with pexpect to do what I need to do. Via the same interface I can configure the charge profile/voltage and it has...

I think I found something that might work. I'll give them a call in the morning and see if I can chat with them a little more. It looks like it has an RS232 interface that I might be able to write an interface to...

Actually I figured it out. I'm getting 27VDC output from Schottky Rectifier Diode (circled) SS26. By severing the cathode side (pointed towards the battery connection); you cut off the pseudo charge circuit. This also means that the control board fully relies on the battery for power (the...

I was thinking of doing something similar. Having a schematic would help isolate what to clip (this is assuming there is no dip switch or anything to actually disable it). Here is a pic of the control/inverter board on one of the Cyberpower UPSs. Would love to know if someone has already...

Ya, the small one. My issue is...some times, I'm not around and want everything to gracefully shutdown; which is why I have the Raspberry pi with my existing APC/Cyberpower setup, which after a couple minutes of no power, it will log in and gracefully shutdown a bunch of VMs running on a couple...

Just curious, how are you managing the Multiplus during a long outage? My current old /crappy UPS, I have a raspberry pi attached that executes a bunch of shutdown scripts on the servers to gracefully shut things down. I'd like to do something similar, but not familiar with what you can do with...

With the MultiPlus if I want to interface it with a Raspberry PI (which is what I use for my existing UPSs to run scripts on loss of power), do I just need the USB VE.Direct interface and that will suffice? Or any additional items? -J

Just for discussion here :) How does the BMS and charger all react and deal with a constant load on the battery with this setup? For example, at full capacity the 1200VA 24vdc version looks like its pulling over 50amps - you'd need a charger that supplies more than that if you are going to do...

The Victron Multiplus series seems to have a switchover in < 20ms which gets close to the APC UPS numbers. Would you suggest the 24v of these? Or another good deal alternative vendor/model?