Mark O' H. · Belrose, Sydney
Previous quarterly electricity bill
First full month bill after installation
Projected quarterly saving
Estimated payback period
From a $1,236 quarter to a bill in credit
A three-phase 54 kWh system, a ducted-air-conditioned home in Belrose, and a household that now runs on stored solar from midday to morning.
Reason for Installation
Mark lives in Belrose, Sydney, with his family. His home runs central ducted air conditioning and heating, which meant his electricity consumption was consistently high. When the discount on his 12-month plan expired and his provider raised rates by approximately 25%, his quarterly bill jumped to over $1,200. That was the moment Mark decided something had to change.
The Installation
The team arrived on time and worked throughout the day. Because Mark had chosen to position the battery in an unused passageway on the far side of the house, the cabling run was longer than originally planned. Mark described the installation process as complex but professionally handled. Overall, the team delivered a satisfactory outcome.
Why VoltX Energy
After receiving the unexpectedly large bill, Mark saw an advertisement for VoltX Energy and was drawn in by the fact that it was an Australian company. Seeing VoltX branded portable power stations stocked at Bunnings added a further layer of credibility. He researched several providers before making contact. Having seen what others in his family had paid for smaller battery systems, the value VoltX Energy offered at the 54 kWh scale was hard to ignore.
The System
| INSTALLED | 7th April 2026 |
| BATTERY | VoltX Energy 54 kWh three-phase |
| INVERTER | 12 kW three phase |
| SUPPLIER | VoltX Energy |
| LOCATION | Belrose, Sydney |
| SETUP | Three-phase, required due to central ducted air conditioning (up to 7 kW/hr load) |
| WARRANTY | 10 years |
The Results
Previous quarterly bill (electricity only)
First full month post-install (May 2026) — a credit
Projected saving per quarter, plus $600–$700 in annual credits
Estimated payback period
Energy Independence
Mark ran the battery in consumption mode for the first month, meaning the system drew no power from the grid unless the battery fell below its minimum charge. The household ran entirely off stored solar for most of that period.
One lesson came early. On a cold night, the central heating was left running, and by early morning the battery had depleted, switching the house back to grid power. From that point, Mark put the air conditioning on a timer, so it heats the house for a set period and then switches off, maintaining warmth without draining the battery overnight.
Mark also switched to an energy plan that offers free power for three hours during the day. Even on overcast days, the inverter is large enough to fully recharge the 54 kWh battery within that window. From afternoon onwards, the household runs entirely on stored power until the following morning.
App Usage
Mark uses the VoltX Energy app regularly, and by his own admission perhaps a little too much. The visibility the app provides has changed how the household thinks about energy. Mark monitors solar generation, battery charge levels, and grid usage in real time. The data has driven practical decisions, from timing the air conditioning to choosing the right energy plan.
