Small Offgrid DIY system

DIY
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1

Hello,

Apologies in advance if this is a dumb question so please bear with me.

My Offgrid system consists of :

  1. MultiPlus 2 48/5000/70 (230V)
  2. SmartSolar CC MPPT 250/100 VE.Can
  3. Smartshunt 500A/50mV
  4. Cerbo Gx
  5. Lynx Power In
  6. Solar Panels 450Wp in 4S2P configuration (3600Wp)
  7. Diy EVE LF280K (14.4KwH) LiFePo4 battery with JK BMS PB2A16S15P .

Wish to know how to make DVCC ON in such a way that, system wide

  1. Voltage and Current parameters should be from Smartshunt
  2. Temperature parameter from BMS
  3. Limit max charge voltage and current to be set manually (55.36V and 40A)

Have read the DVCC manual, but confused with SVS, SCS and STS enable/disable settings for non Victron managed battery.

Appreciate all the help

Thanks

Aananda

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AanandaOffgridSystem (1)
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2

Just swtich on DVCC and leave SVS, SCS and STS off.
Some BMS, like pylontech even force those settings.

with DVCC swtiched on and the BMS selected as battery manager, the Cerbo GX will instruct you MP2 and your two MPPTs to apply the correct charge voltage.
MP2 and MPPT must be connected to to Cerbo GX via Ve.bus (MP29 or VE.can (MPPT).
Instead of JK BMS you can also use SmartShunt but than you might loose alarms from JK BMS.
I have no experience with the SmartShunt for batteries.

BTW: you can show data from several battery monotors. Just enable them in GUI v2 → settings → battery → battery monitor

3

Thank you very much for the suggestions.

Yes all components are connected using VE cables.

  1. MP 2 to Cerbo Gx VE Bus port using RJ45 cable
  2. SmartSolar CC to Cerbo Gx VE CAN port using RJ45 cable and terminated at both ends
  3. Smartshunt to Cerbo Gx using VE Direct cable
  4. JK BMS to Cerbo Gx BMS CAN using BMS Type A RJ45 cable and terminated at Cerbo Gx end only

Also

  1. SmartSolar CC is the (only one) charger in the system as am not using Grid and disabled MP 2 charger in settings.
  2. Have selected Smartshunt as Battery Monitor in Settings/System Setup/Battery Monitor

All communications are good and reported to VRM.

Currently the AC load is less and battery gets fully charged by afternoon.

Wish to charge the battery slowly so as to make it fully charged by evening and hence thought of DVCC to limit charge current.

Will enable DVCC On and keep SVS, SCS and STS Off and observe

Thanks again

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