An engineering-led solar and battery installer, not a box-shifter

E3 Energy (E Cubic Pty Ltd) designs and installs solar and battery storage for Australian homes and businesses. We start with your bill and usage data, not a product brochure, and we'll tell you when to buy less, or not yet.

Why we exist

Most Australian solar installers are sales-led: the customer is sold a system, not designed one. We sit on the other side of that line. Every install, residential or commercial, starts with bill data and usage intervals, and the system is sized to your roof, your tariff and your load. The team’s track record spans residential, commercial and utility-scale energy projects, which means a commercial client doesn’t get shuffled to a sub-contractor halfway through. Same team, same accountability, from assessment to monitoring.

Jerry Lu

Founder

“ We believe energy storage will play a critical role in building a cleaner, smarter, and more resilient energy future for Australian homes and businesses.”

How we work

Three things that separate an engineered install from a sold one.

01

Premium kit only

We install Sigenergy, FOX ESS and JA Solar. No white-label or unbranded kit. Sigenergy for modular, 3-phase and VPP-ready systems; FOX ESS for flexible home battery and inverter setups; JA Solar for the panels.

02

Sized from your data

We review your interval and bill data before quoting, then model what each option does to your running costs: including the trade-offs. You get monitoring of usage, battery state and generation after install.

03

One team, residential to commercial

The same team handles design, installation, commissioning and aftercare: from a single home battery to a commercial energy storage system. Installed by accredited installers; warranty and monitoring supported locally.

What we install

The system types we design and install across home and commercial sites.

Solar + Storage

Solar paired with battery so daytime generation covers the evening peak

Residential Battery Storage

Backup and bill reduction, retrofit to existing solar or as a full system

EV and V2H

EV charging tied into your system; V2H (vehicle-to-home) lets a compatible EV power the house overnight: only the Sigenergy + DC charger combo delivers this in AU today

Containerised ESS

Larger commercial and industrial storage in containerised form for demand management and peak shaving

Off-grid systems

Standalone power for remote sites, farms and industrial loads with no practical grid connection

Energy management platform

Real-time monitoring of usage, generation and battery state across home and commercial sites