A solar array on its own is a good start. But a home that also has a battery, an electric vehicle and a heat pump holds enormous untapped potential — and that potential is only realised when those assets act as a system rather than as separate devices plugged into the same meter. A home energy management system, or HEMS, is the software and hardware layer that makes coordination happen: reading your tariff structure, forecasting tomorrow's generation and grid pricing, and scheduling every load to minimise what you buy from the grid.
At Zenith we design HEMS integrations around the specific combination of hardware in your home and the tariff your retailer offers. There is no generic template. A household on a time-of-use tariff with a large battery and a garage full of EVs needs a very different dispatch logic from a household on a flat rate with a single vehicle and a gas hot-water system it is planning to replace. We map both, then configure the automation layer — whether that sits in the inverter, a dedicated gateway, or a cloud platform — to do exactly what the numbers say it should.
What a HEMS actually controls
- Solar export management — holding generation in the battery or diverting to hot water before exporting at low feed-in rates
- Battery charge and discharge scheduling pegged to time-of-use tariff windows
- EV charging triggered by solar surplus and completed before peak rates begin
- Hot-water and pool-pump load shifting to midday solar windows
- Demand response participation — automated curtailment or discharge during grid stress events that attract retailer incentives
- Real-time alerts and historical reporting via a single app dashboard
App control and visibility
Every Zenith HEMS installation connects to a monitoring dashboard accessible from your phone or browser. You can see your home's energy flows in real time, review yesterday's generation and consumption, and override any scheduled automation when your routine changes. For most households, the system simply runs — you check in occasionally and confirm it is saving what it promised. For those who want to go deeper, the same platform exposes every setting and schedule for manual tuning.
Demand response and the virtual power plant
Australian electricity networks are increasingly offering demand response programs that pay households to reduce grid draw — or export stored energy — during periods of high system demand. A properly configured HEMS is the prerequisite for participating, because the battery must be managed to a state of charge that allows dispatch on demand without compromising your overnight energy security. We configure dispatch rules that keep you inside the program parameters while always prioritising your home's own needs first.
Integration also extends forward to tariff changes and future hardware. When you add another EV, upgrade your battery or move to a new retailer with a different peak window, the HEMS configuration updates — and the savings model recalculates. It is infrastructure that improves over time rather than locking you into today's conditions. Most Zenith customers with a full home energy stack see effective electricity costs fall by 85 to 100 per cent of their pre-solar bill within twelve months of commissioning.
Frequently asked
What inverter or battery brands do you integrate with?
We work with the leading Australian-market platforms including SolarEdge, Fronius, SMA, Sungrow, Tesla Powerwall, BYD and Enphase. Compatibility is confirmed during the design phase — we will not specify a HEMS that cannot communicate natively with your hardware.
Will I still be in control, or will the system make decisions I don't like?
You set the rules and priorities; the HEMS executes them. You can override any automation from your phone at any time. Households typically find the defaults we configure match their preferences well, but every parameter is adjustable.
Is a HEMS worth adding if I already have solar and a battery?
Almost always, yes. Most standalone solar-and-battery systems operate on fixed charge and discharge schedules that do not adapt to your daily tariff window or solar forecast. A HEMS typically recovers an additional 10 to 25 per cent in avoided grid cost on top of what the hardware alone achieves.