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I recently purchased a Titan power bank to use both at home and in my RV. One of the great things about the Titan is that it has a 30A RV plug that can be used to power a typical travel trailer. I just finished the AC wiring in my trailer to accommodate the placement of the Titan under the bed...

My shipment of eight 3.2V 280AH LiFePo4 batteries arrived this afternoon in great shape! A total of 52 days from my initial order until arrival in Michigan, USA. Shipped DDP via sea to California, then land transport to Michigan. Excellent packaging with no damage and no surprises. Double...

I'm very happy with my 8-280ah LiFePo4 batteries. I top balanced them at 3.6 volts and I'm within 10 mV. I have not discharged them all the way yet but so far at 25% discharge, I'm still within 10 mV. The internal resistance on all of my cells was 0.13-0.14 ohms. I finished building up my...

A fuse has two basic current ratings; Normal and Interrupting current. The normal current rating of a fuse is based on your maximum expected load/charge current under normal conditions. Using a value of 25% over your max normal load current is a good rule of thumb (for example, use a 250 amp...

I'd be more concerned with the difference in the internal resistance between the cells rather than the voltage. Voltage differences could simply be a result of the difference in the state of charge which is not an issue as Steve_S points out. I'm not sure if the variance you are seeing in the...

A Normally Open 500a EV200AAANA relay works very well and uses much less current than the Chargery relays when closed. I got a used one on eBay for about $30.

Craig's comment is true that you could set the LVD voltage a little higher, then wait for the charge cycle to start a short time later. It's something to consider if your situation is such that charging the batteries will positively be available before the low voltage reaches a critical level...

Another thing to consider would be to purchase a "solar generator" all in one unit, like the Titan. It's stackable and portable enough that you could take it with you to the cabin and use it indoors. It's got two 1000 watt solar charge controllers and a 3000 watt inverter built in. The...

Test results of the latest Firmware V4.04 for the BMS08T looks good and seems to have solved the Ah issue. @Chargery, the firmware V4.04 for the BMS08T seems to have solved the Ah error I was getting before. I charged my bank up to 100% SOC this morning to synchronize both the Victron and the...

What size did you cut your copper bus bars to? Also, in order to speed things up, couldn't you series connect your batteries into their final configuration and use your main power charger source to charge the whole battery bank with a BMS installed to watch individual cell voltages? Then...

Good luck. I ordered 8-280ah LiFePo4 batteries on April 5, DDP shipping by sea, and I'm still waiting for mine to clear customs and show up on the Fed Ex tracker for delivery to Michigan. Amy has been good about communicating, but I'm getting a little concerned. It's been 6 weeks so far.

FYI, here's a look inside of my external Lifepo4 battery box with the top removed, with negative terminal on the left, positive terminal on the right. I put 8 176ah cells together in series of 2-4 cell groups for ease of future remove if necessary. I placed a plastic insulator between cells...

I've taken a little different approach to limiting when the Multi charges my battery. I use the AC In to serve loads when PV is not available and batteries drop to 20% SOC, but I don't want to charge my batteries too much from "AC In" so I simply lower my Absorption and Float voltages on the...

Good luck. I ordered 8-280ah LiFePo4 batteries on April 5, DDP shipping by sea, and I'm still waiting for mine to clear customs and show up on the Fed Ex tracker for delivery to Michigan. Amy has been good about communicating, but I'm getting a little concerned. It's been 6 weeks so far.

FYI, I finally got up enough courage to install 8 x 100 watt solar panels on my RV (4S2P configuration). I anchored 4-10' strut channels to the roof, then attached the panels to the strut channels as shown in the attached photo. I ran the cables down through a gland near the front into a...

Yes, I'm going to set it up the way onemorebattery did (see his previous post) with one used $29.99 contactor and the optocoupler utilizing both charge and discharge relay signals from a Chargery BMS. Since the BMS is last resort protection for the bank, if it needs to shut down for any reason...

Well how about that that. Within minutes of writing my previous post, FedEx tracking just went live on my shipment of 8-280ah batteries in Carson, CA. Expected delivery date of May 29. Very excited to finish my project!!!

My tracking just went live a few minutes ago!!!

I went with the Chargery BMS8T for my 8S build. It seems to be very versatile and I'm planning to use it with a couple of small SSRs in series to drive the coil on a 500A TE Contactor relay (still coming in the mail after nearly two weeks). In addition, I'm also using two other optocouplers to...

Let try this image. Again this is very early in my build but it show the concept. The BMS leads will feed into the battery compartment through the middle hole when its done above the terminal block.

I used doubled sided VHB tape at the four corners between cells. Double tape on the top corners, single on the bottom corners, since my cells have a very slight bulge on the lower half of the cell when they are fully charged. This kept my cells in good alignment when I used heat tape to bind...

That's great! Mine are scheduled for delivery on Friday in Michigan. According to the FedEx tracker, they're in Toledo, OH as of this afternoon.

If you want some battery redundancy, I would recommend building two 16s banks each with its own BMS and parallel them. That way if you ever had to perform maintenance on one of the banks, you still could keep the other bank in service. It will cost you the price of an extra BMS but it gives...

I purchased a Titan power bank earlier this year to use both at home and in my RV. One of the great things about the Titan is that it has a 30A RV plug that can be used to power a typical travel trailer. I just finished the AC wiring in my trailer to accommodate the placement of the Titan under...

I run V4.04 on the Chargery and have not ha I run V4.04 on the Chargery and have not had any problems. I do have another LiFePo4 pack with an Overkill BMS on it where I had a similar issue with wide voltage variations between two adjacent cells. It turned out to be a case where I had fused...

I am driving a 500A TE Contactor coil at 24V as my main battery cutoff, using the 12V Charge and Discharge signals from my Chargery BMS to power two small SSR's, then connecting the SSR outputs in series with the TE Contactor coil across my 24 V bus. This allows me to use one TE Contactor that...

Make sure the breaker or fuse you use for main battery protection has enough interrupting capability. I use a 250 amp Class-T fuse for catastrophic battery protection (280 ah, 24V) because it has 20,000 amps of interrupting capability. Many of the less expensive types of fuses/breakers only...

This might work too: https://www.bluettipower.com/products/dc-charging-enhanncer-d050s

Since I'm building a 24V battery bank, I'm using the Victron 24/12V DC/DC 70A convertor to provide 12V power for my RV DC system.

I really can't recommend anything to you since I wouldn't want you to mess up your Bluetti based on my recommendation. However if I owned the Bluetti and wanted to see if it would handle it, I would feel comfortable over paneling it with up to 8x100 watts of panels in a 2S4P configuration to...