Hi I have the following Victron based system:
- Quattro 48/10000/140
- MPPT RS 450/100
- Victron EVCS Charging station 32A
- Cerbo GX
- 5 x 5 kWh BSL LiFpo4
- SMA Sunnyboy 6kw ( managed by frequency control)
- Isolation Transformer ITR 2000 ( for VTL in a few months)
All the system seems to work pretty well and I have no comms problems. The issue is on clear days with clouds when the the battery is full, and the EVCS is on auto and I get sun burst the EVCS takes ages to ramp up its draw so the MPPT shuts down and the Quattro raises frequency ( limiting the Sunnyboy output) before the EVCS timidly starts at 6 amps and over a period of minutes begins t overy slowly creep up current draw often never getting to full power. The EVCS also ramps load down slowly so that often the ESS will supply the EVCS when clouds come over.
EVCS asleep at the wheel during a sun burst leading to MPPT ( PV charger) shutting down ( for a minute or so)
ESS supplying load to EVCS during a cloud burst as EVCS is too slow to respond to cloudburst
BTW - the Iso transformer will be installed shortly to allow me to us my vehicle VTL as secondary Shore power during extended bleak weather ( location Central VIC, Australia)
