The configuration has 3xMultiplus+CERBO-GX+BMZ Z battery. As I use "virtual battery" from the grid operator, there is a smaller cost associated with storing the excess energy in the grid and using it when needed compared to the cost of storing the energy locally in the battery. The battery is thus in the system, at present, only to allow the Multiplus system to work. How should the system be configured to maximize battery life?
There is a "use battery with battery life" option in the ESS configuration. But this appears to be for situations when the battery is to be actively used as a source of energy.
Every KwH stored results in wear of the battery. On the other hand, keeping lion batteries fully charged seems to be discouraged in another post (https://community.victronenergy.com/questions/35861/is-it-good-for-the-batteries-to-keep-them-fully-ch.html). So what is the optimum state of charge? Should the battery be periodically discharged/recharged? What is the recommended period? I did not find any recommendation on this from the battery manufacturer.
Also, I am not sure how to configure the system. The Cerbo has a minimum SOC limit menu option but not a maximum one. Maybe preventing the full SOC could be achieved using the scheduled charge level menu option.
The questions are:
- What is the best option to ensure long term battery health of a Lion battery (BMZ) when the battery is needed only as a backup?
- How to configure CerboGX to achieve this?