Solar Battery Retrofit Needed

I need an additional battery retrofitted to my existing 5-10 kW grid-tied solar PV system. The primary goal is to store excess energy.

Ideal Skills and Experience:
- Experience with grid-tied solar systems
- Knowledge of battery integration and retrofitting
- Electrical engineering background is a plus
- Relevant certifications in solar energy systems

I have a 5.2kWh Givenergy battery already up and running. I have sourced an additional battery of the same specification and would like someone to attach it in parallel to the existing battery and commission it please.