Recent content by gyrex

Are the battery loads not connected to a BMS inside the plastic housing? Because I want to connect my cells in parallel within the pack.

I'm about to build a new battery 4P16S, 280Ah which will be connected to 3x Victron Multiplus II 5kVA inverters in 3-phase. My potential, continuous load from the inverters will be ~350A and finding a BMS capable of handling this load will be very difficult. I realise that what I'm about to say...

It was fun to build. I'm not sure what hardware version he's up to now but I built v1 or v1.1 from memory.

I use a lot of power: 3 phase Tesla charger @ 12kW, large ducted A/C, pool equipment, 30A induction cooktop etc. You get the picture. I've already built the DIYBMS but I'm looking for something which will talk to my Victron gear and something less modular. I'll keep looking around, thanks.

I'd prefer to use contactors rather than MOSFETs so I'll look for another BMS. Yes, my inverters draw up to 400A - 3x Victron MultiPlus II 5000kVA in three phase.

I'm interested in this BMS but my inverters will draw up to 400A from my battery so the 200A version won't suffice. Is it possible to pair it with a contactor? ie. Is there a low voltage signal one can use to open/close a contactor?

I've bought a bunch of 0.2Ω 100W power resistors from Aliexpress for around $2 each. 3 in parallel will draw a total of 48A (50W at each resistor) at 3.2V nominal which will suit my testing purposes. I'll buy a few of these capacity testers so I can test a few cells concurrently.

I found out after the fact that 2 of my 48 cells had a much higher internal resistance and lower capacity (tested at ~260Ah vs the others being ~280Ah). Had I picked this up soon after receiving the cells I could have raised a dispute with the vendor and/or credit card company.

I agree that an inverter/shunt would be ideal but I won't be able to test single cells using an inverter (my Victron MultiPlus II 48/5000VA has a minimum DC input of 38V) hence the need for a device such as the DT24P which can test single cells at lower voltages but still draw a high current load.

I'm actually referring to the DT24P, not the DL24P. Uses a shunt and supports up to 100A loads (use a power resistor bank) and relays to shut off the load at a programmable low voltage mark. Link to Aliexpress seller...

Hi, did you find out if you can use ANL fuses with the Victron Lynx?

I've got a DL24 already (works fine) but I was after a tester which can pull more load from the source which is why I was interested in the DT24P. Anyway, I hope you can resolve your issue.

Note: This thread is about the DT24P not the DL24P (with the large fan) I'm about to start building my second hybrid solar system (sold my home and building a new one) and one of the things which I wish I did on my previous build was to test the 280Ah LiFePO4 cells prior to putting them into...

Thanks Bob. Yes, I read about the issues with powering the BMS via the sense wires and the fix of powering the BMS externally. I'll take your advice and keep an eye out for the new version.

Does anyone have any feedback on the Chargery BMS? I noticed that they have a new-ish product called the BMS16 v2.0 which appears to have integrated the LCD into the BMS itself. I'm interested in this BMS because of the seperate ports and the ability to wire the charge and discharge signal wires...