Sustainable Solar Systems Pty (Ltd) "SustainSolar" is a subsidiary of the Sustainable Energy Group - a leading systems integrator specialised in high quality, turn-key containerised Solar PV and battery energy storage systems (BESS). SustainSolar offers an innovative range of products consisting of modular, plug and play solutions suitable for various applications such as off-grid, mini-grids, rapid deployment, and emergency power storage (back-up, self consumption optimisation, peak shaving and load shifting).