18kW Solar PV + 60kWhr Li-On battery + 12kW Battery System – Lenasia, JHB

final 3 batteries
ZPE Editorial Team
ZPE Editorial Team
Project: 18kW Solar PV + 60kWhr Li-On battery + 12kW 3-phase inverter System
Project Scope:

Design & executed a hybrid solar + storage system using Victron & Freedom Won to take a 6-bedroom house over 95% off the grid.  Maximised self-sufficiency by installing sufficient battery storage to absorb all excess solar PV during the day to discharge throughout the night. System includes grid limiting and active control of a grid-tied inverter to allow off-grid functionality of solar PV.

Battery system also serves as primary load shedding protection. Integrated client’s existing diesel generator such that it can serve as a secondary back-up should power outages be extended and reduction in diesel consumption if load shedding during sunlight hours. System includes remote monitoring and control to allow active monitoring and tweaking of system for maximum customisation and optimisation.

Also executed main DB and sub-DB re-distribution of loads, some energy efficiency measures to ensure smooth and optimal performance of system.


  • 3x 5kVA battery charger/inverters
  • Remote energy monitoring + grid limiting control
  • 18kW grid-tied solar PV integration
  • 3x 20kWhr Li-On batteries
  • Integration with 50kVA diesel generator


Location: Lenasia, JHB
Completion Date: Nov 2019

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