1. What does E3 Energy do?
E3 Energy (E Cubic Pty Ltd) designs, installs, and supports solar and battery storage systems for both residential and commercial customers, with installations across Melbourne and Australia-wide. Services span home batteries, commercial energy storage, solar-plus-battery integration, and off-grid power solutions for remote sites.
2. Will a battery actually lower my electricity bills, and by how much?
Yes. Most Melbourne homes export cheap solar at midday and then buy power back at peak rates after 3 pm: a battery closes that gap by storing the surplus and discharging it when it’s actually used. Depending on your bill and usage pattern, peak electricity costs can be reduced by up to 70%.
3. Does E3 Energy sell a fixed package?
No. Rather than offering a one-size-fits-all package, E3 Energy starts by reviewing your recent electricity bills, peak usage times, load profile, tariff, and roof, then sizes the battery capacity and brand specifically to match your actual bills. Not a brochure spec.
4. How does backup power work during an outage, and what can it run?
A backup-capable system automatically switches your nominated essential circuits to battery power when the grid drops. No manual changeover needed. Whether whole-home backup is possible depends on your switchboard and inverter capability; E3 Energy will tell you upfront exactly what your setup supports rather than overpromising.
5. What battery and inverter brands does E3 Energy install?
Installations use premium kit only, including Sigenergy, FOX ESS, and JA Solar, with specific models such as the CQ7, H3 Smart Series, KH Series, SigenStor EC SP/TP, and SigStor for residential and commercial applications.
6. What battery technology is used, and is it safe?
Both FOX ESS and Sigenergy systems use lithium iron phosphate (LiFePO4) cells, chosen for home and commercial storage because of their thermal stability and long cycle life compared with other lithium chemistries. A built-in battery management system (BMS) handles charging, temperature, and cell balancing for safety.
7. What size battery suits a typical home?
Two indicative starting points are offered: a smaller ~5kWh system suited to smaller households or modest solar arrays, mainly used to shift daytime solar into the evening; and a larger ~10–15kWh system for bigger households or higher evening loads, with modular brands like Sigenergy allowing capacity to be added later. The final size is determined by your actual usage data.
8. Are there any rebates or incentives available for installing a battery?
Yes, current battery incentives may apply. Eligibility details are outlined on the Incentives page, and larger systems (such as the 10–15kWh option) may qualify under current programs.
9. Does E3 Energy provide after-sales support, and who does the installation?
Yes. The same team handles the process from assessment through installation, commissioning, and ongoing monitoring. Work isn’t handed off to subcontractors, and installation is carried out by accredited installers. E3 Energy offers 24/7 technical support, has over 10 years of experience in residential solar and battery systems, and has completed 5,000+ residential installations.
10. How do I get a quote, and what information do I need to provide?
You can request a free, personalised quote through the website by selecting your project type (Residential ESS, Commercial ESS, Solar + Battery, or Off-grid Solution) and estimated system capacity. Alternatively, you can send your latest electricity bill or current solar setup, and E3 Energy will model what a battery or solar-plus-battery system would realistically do for your usage, including cases where it wouldn’t be worthwhile, with transparent, no-padding pricing. The free Savings Calculator also estimates potential savings (including the federal rebate) in under a minute.