Standalone interface

[DumitruLuca]

After watching Andi's presentation on his YT channel, I decidede to purchase the standalone DCDC interface for my hybrid solar system. The only difference in my case is the battery voltage, which, in my case is 24 V.
Beforehand, I would appreciate any information about two details:

1. Can I use the interface in a hybrid Victron system (MPPT, Multiplus II) with my 304 Ah 24 V LiFePO4 DIY battery? Is there a special ("Peter") interface firmware necessary in this case?
2. If the answer is positive, can be the max discharge current set to more than 100 A? I am using a JKBMS model JK-B2A8S20P (hardware ver. 9.X, software ver. 9.01.M3).
   Your reply would be much appreciated.

[Uksa007]

Hi,
Thanks for your interest.

You will need a Victron device that support BMS-CAN, that can be a Cerbo GX, Raspberry Pi with a CAN Hat or some inverters allow re- configuration of a VE.CAN port to support BMS-CAN (also requires their cable).

Eg Multi plus II:
A VE.Can interface. This can be used to connect to Victron VE.Can devices (eg VE.Can MPPTs), or the port can be reconfigured via the Remote Console for use with a compatible CAN-bus Li-ion Battery.

I will need to set the firmware for your 24v setup, and 200A or whatever you want.
Just let me know once you have ordered and I will make some notes on your order.

These are the default setting, which should be good for 48V 16s LifeP04 280Ah:

These are setting you will need to let me know what you would like set.

charge_a: "50" (Max charge current)
absorption_v: "55.2" (Charge V, 3.45V/cell)
absorption_time: "30" (Time to absorb)
rebulk_offset: "2.5" (absorption_v - rebulk_offset = charge request)
discharge_a: "100" (Max discharge current)
min_dischange_v: "48" (Min discharge V, 3V/cell)
force_chg_v: "44" (V must charge, 2.75/cell)

Regards.

[DumitruLuca]

Thank you for the prompt reply!
In my case, I have already prepared a Rasperry Pi - supported CAN -BMS HAT to connect to the "Peter" ESP interface. So far, the Multiplus and the MPPTs are already tied to the Raspberry Pi (via a VE-Bus CAN to USB adapter) and VE.Direct to USB adapter, respectively.

It is a configuration in operation, and very close to the one implemented by Andy from the Off-grid garage.
If I understand correctly, purchassing your interface suits my needs and after your "green light" I will come again with the setings for my 24 V configuration.
Thanks a lot and kind regards!