The Victron Pylontech install documentation recommends:
5.3 Inverter Settings
In the Inverter tab of VEConfigure
VEConfigure Inverter Parameter Setting
DC input low shut-down 44V
DC input low restart 48V
DC input low pre-alarm* 48V
However:
PylonTech recommended
DC input low shut-down 42V
DC input low restart 45V
DC input low pre-alarm 45V
which is correct/best to use?
thanks
J
My setting i use with out any issues.
TAB: Assistant Configuration
ESS (Energy Storage System) (size:945)
*) System uses LiFePo4 with other type BMS
(This can be either a BMS connected via CAN bus or a BMS system in which the
batteries are protected from high/low cell voltages by external equipment.)
*) The battery capacity of the system is 200 Ah.
*) Sustain voltage 48.00 V.
*) Cut off voltage for a discharge current of:
0.005 C= 46.00 V
0.25 C= 46.00 V
0.7 C= 46.00 V
2 C= 46.00 V
*) Inverting is allowed again when voltage rises 1.20 V above cut-off(0).
*) Relevant VEConfigure settings:
- Battery capacity 300 Ah.
- PowerAssist unchecked
- Lithium batteries checked
- Dynamic current limiter unchecked
- Storage mode unchecked
TAB: Charger
Enable charger checked
Weak AC input unchecked
Stop after excessive bulk unchecked
Lithium batteries checked
Use equalization (tubular plate traction battery curve) unchecked
Charge curve Fixed
Absorption voltage 52.00 V
Float voltage 51.00 V
Charge current 35 A
Repeated absorption time 1.00 Hr
Repeated absorption interval 7.00 Days
Absorption time 1
TAB: Inverter
PowerAssist unchecked
Inverter output voltage 230 V
Inverter DC shut-down voltage 44.00 V
Inverter DC restart voltage 48.00 V
Low DC alarm level 48.00 V
Do not restart after short-circuit (VDE 2510-2 safety) unchecked
enable AES unchecked
Regards
Rob D
NZ
Hi @jimbo,
It doesn't really matter. Ultimately the battery will take care of itself.
The Victron settings are more conservative, so you will sacrifice some battery capacity for a more reliable system.
It is always Victron's preference that the inverter shuts itself down BEFORE the battery enters some internal error low voltage protection shutdown state, that might require some manual intervention.
Pushing the shutdown and restart voltages too low can lead to the system cycling too quickly (3 times repeatedly), and then not automatically restarting (requiring a manual intervention to start up again).
None of these settings will damage either the battery or our equipment, so you are free to modify them to suit your particular circumstances, and find the best balance of reliability and usable battery capacity.
