We have one issue in one of our clients project name 'Sher Singh Nagarkot' at VRM portal.
The system includes:
1. PV : 5.94 KWp
2. Inverter: Victron Quattro 10KVA
3. CC: Blue MPPT 150/70
4. Battery: 400Ah Tubular
Right now the load is around 3.3 KW, Solar Power is fluctuating from 2500-4500W. It is installed in hilly area.
When solar power is low, both solar and battery contribute to load and hence battery voltage drops to 49V and which triggers to take AC input, which will charge the battery to 56V till 3mins then AC input is cut off, then again solar power and battery contribute the load.
In night time, battery only contribute to load, battery voltage goes to 49V then AC input is taken which will contribute to load and charge the battery to 56V then AC input gets cut off, again the battery contribute to load and the cycle goes on.
At the end the battery is getting charged and discharged that depletes the battery life.
What we want is to not use battery at all and use it for backup when there is no Solar or Grid. What do you recommend?
