FAQCommercial Battery Questions
Straight answers from the licensed contractor doing the work.
What is the Kstar BluePulse, in plain English?
It is a commercial battery system made of two parts: an outdoor steel cabinet full of lithium iron phosphate battery modules, and a three phase hybrid inverter that mounts on the side of the cabinet or on a wall nearby. One cabinet holds between 64 and 261 kWh depending on the model, and the inverters run from 20 to 125 kW. The battery management, energy management and inverter are all Kstar's own, so it behaves as one system with one monitoring platform.
We already have solar. Can you add a battery without replacing it?
Yes. BluePulse supports AC coupling, which means the battery connects at your main switchboard alongside your existing solar inverters. Nothing on the roof changes. The battery charges from the surplus your solar would otherwise export and discharges when you would otherwise be buying power, including through the evening peak. We check your switchboard capacity, your existing inverters and your network agreement before we propose it.
How does a battery cut a business power bill?
Three ways. It lowers the demand charge by discharging through your peak window so the network never sees your full load. It stores cheap or free midday solar and uses it when grid power costs the most. And it lifts how much of your own solar you use on site instead of exporting it for very little. On large business tariffs the demand charge is often the biggest of the three, and it only shows up when you read the network lines on the bill, which is why we ask for the full bills rather than the totals.
What size battery does our site need?
It depends on the shape of your load, not just the size of your bill. We size from twelve months of bills and, where your retailer can supply it, half hourly interval data, then model the battery against your peak window. Because the demand charge is set by your single worst half hour in the month, we size with headroom and quote a prudent saving rather than a best case.
Will it keep us running in a blackout?
It can. The hybrid inverter has a built in transfer switch that Kstar rates at 10 milliseconds or less, and a backup output of up to the inverter's full rating, plus a generator input that needs no separate changeover switch. What is backed up and for how long depends on your loads, the battery size and how the switchboard is arranged, so backup is designed per site and the protected circuits are listed in your proposal. We do not promise whole site backup without doing the load assessment first.
Where does the cabinet go, and how big is it?
Outside, on a concrete slab or plinth, with clearances around it for airflow, service access and fire separation. The smaller cabinets are about 1.06 m wide, 1.38 m deep and 2.09 m tall and weigh 1.2 to 1.4 tonnes. The larger ones are about 1.32 m wide, 1.44 m deep and 2.42 m tall and weigh 1.8 to 2.7 tonnes, so delivery is by crane truck or forklift. We confirm the location, vehicle protection such as bollards, and the cable route when we look at the site.
Is it approved for grid connection in Australia?
Every grid connected system in Australia has to use inverters on the Clean Energy Council approved list. Kstar's BluePulse 20 to 50 kW hybrid inverters joined that list in September 2026, and larger sites can run several of them in parallel. The 80 to 125 kW models are newer to Australia, so before we lodge any network application we check every model number against the current approved list and design around equipment that is listed on that day. Your proposal names the exact models.
Are there rebates for a commercial battery?
Sometimes, and we will tell you plainly either way. At the time of writing the federal battery discount only applies to systems up to 100 kWh of nominal capacity and carries other conditions for business sites, so most cabinets in this range are sized for the bill saving rather than for a rebate. New solar installed with the battery can earn small scale technology certificates, which we handle for you and show in the proposal. Scheme rules change, and the rules that apply are the ones in force when your system is installed and commissioned.
What warranty does it carry?
Kstar's Australian and New Zealand terms give the battery cabinet and the hybrid inverter a 10 year product warranty, with a 10 year performance warranty on the battery's usable energy, and a 2 year warranty on accessories such as the cabinet air conditioner. The full terms are in the warranty documents on this page. Our installation work is covered by our lifetime workmanship warranty (conditions apply, see our Terms).
Who is Kstar?
Kstar was founded in 1993 and is listed on the Shenzhen Stock Exchange. It is a large manufacturer of uninterruptible power supplies and data centre power equipment, with more than 4,000 staff and products sold in over 180 markets, and it builds its own inverters, battery management and energy management for the BluePulse range. Power electronics that keep data centres up is a good background for a commercial battery.
Do you install other commercial battery brands?
Yes. We design around the site first and choose equipment second, and we also install commercial systems from other manufacturers where they suit the job better. Your proposal explains why we have recommended what we have.
