Relectrify has installed the first commercial AC1 battery energy storage system in Renmark, South Australia, giving the market a real-world test of a storage architecture that removes the conventional inverter from the system. The project was installed with YES Energy and is sized at 250 kVA / 1,089 kWh . The numbers are modest compared with Australia's gigawatt-scale battery boom, but the technical claim is not modest. Relectrify says AC1 uses its CellSwitch electronics to generate grid-compliant AC power directly from battery cells, rather than storing energy as DC and converting it through a separate inverter stage. AI-generated image The Renmark AC1 installation is small by grid standards, but it is a commercial test of inverterless battery architecture. 250 kVA AC power rating 1.09 MWh installed storage 100 MWh rollout target 2028 project run date What Relectrify Is Testing A conventional battery storage system has cells, modules, packs, battery management hardware, power conversion equipment, thermal systems, protection equipment, and grid controls. The inverter is one of the most important and expensive parts of that chain because it converts the battery's DC output into AC power that the grid or a building can use. Relectrify's pitch is that cell-level control can replace that separate conversion stage. The company says each AC1 unit individually monitors and controls nearly 4,000 battery cells. That level of granularity lets the system coordinate cell output to produce AC power directly. It also gives the software a clearer view of weak cells, imbalance, and usable energy than pack-level management alone. The Renmark installation follows certification to International Electrotechnical Commission standards and Australia's AS/NZS 4777 grid connection standard. That matters because an unusual storage architecture only becomes commercially relevant when it can pass the same grid and safety gates as conventional equipment. The CurrentCells read AC1 is worth watching because it attacks storage cost from the balance-of-system side. Battery cells keep getting cheaper, so inverters, serviceability, usable capacity, and lifecycle performance are becoming larger parts of the commercial battery argument. Why Removing the Inverter Matters Inverters add cost, complexity, conversion losses, installation work, and another maintenance category. They are also mature, bankable, and well understood. That makes Relectrify's claim interesting but demanding. An inverterless system has to show that removing hardware does not simply move complexity into electronics, controls, certification, and operations. ARENA's project documents point to three expected advantages: lower capital expenditure from removing a separate inverter, better usable lifetime capacity through individual cell management, and lower operating expenditure because faulty cells can be identified and replaced more precisely. Those are practical claims, not chemistry hype. If they hold up in field data, the impact could be strongest in commercial and industrial storage where customers care about installed cost, usable energy, uptime, and service calls. Relectrify says AC1 will retain 40 percent more of its original capacity after 20 years of daily cycling than conventional battery storage systems and deliver 99 percent of available energy per cycle. Those are large lifecycle claims. The Renmark system and the broader rollout will now have to turn them into operating evidence. AI-generated image Cell-level control is the heart of Relectrify’s attempt to simplify commercial battery systems. The More Energy Project The installation is part of Relectrify's More Energy Project, a AU$61.1 million program supported by AU$25 million from the Australian Renewable Energy Agency through its Advancing Renewables Program. The project began in August 2025 and is scheduled to run through May 2028. The goal is to deploy AC1 systems at customer sites across Australia with a cumulative nameplate capacity of up to 100 MWh. That rollout is the real test. A single pilot can prove that a unit works. A multi-site deployment tests supply chain, installation processes, grid connection, remote monitoring, maintenance procedures, and customer economics. ARENA has described commercial and industrial storage as a missing middle in Australia's energy transition. Residential batteries are growing quickly, and utility-scale projects are now common. C&I customers sit between those markets, with larger loads than households but less appetite for complex utility-scale project development. A simpler storage architecture could fit that gap if it reduces installation and operating friction. AI-generated image Commercial and industrial storage needs predictable installation, low service burden, and enough usable energy to justify the project. What Has to Go Right The first requirement is reliability. Cell-level electronics create new control possibilities, but they also have to survive heat, dust, cycling, outages, firmware updates, and normal site abuse. A conventional inverter can fail, but it is a familiar failure mode. Relectrify has to show that its distributed electronics are easier to manage, not just different. The second requirement is bankability. Customers and financiers will want warranties that map cleanly to real duty cycles. They will also want clarity on replacement parts, service response, software support, cybersecurity, and performance measurement. In the C&I segment, a battery that needs too much specialist attention can lose its economic advantage quickly. The third requirement is channel discipline. Relectrify is entering a market packed with lithium iron phosphate cabinets, hybrid inverters, energy management systems, and turnkey installers. AC1 does not need to beat every utility-scale system. It needs to prove a strong enough fit for customers where inverter removal, precise cell management, and long usable life offset the risk of a newer architecture. Why the Industry Should Watch Battery headlines often focus on bigger cells, new chemistries, or record project sizes. Relectrify's AC1 points to a quieter area of innovation: power electronics and pack architecture. As cells become cheaper and more standardized, the surrounding system has more influence over installed cost and lifetime value. That is especially true for smaller commercial systems. A customer does not buy storage only as a commodity block of kilowatt-hours. They buy uptime, bill savings, backup value, demand-charge management, solar self-consumption, and a service relationship. If an inverterless design can reduce hardware, keep more capacity usable for longer, and make maintenance more precise, it could change how C&I batteries are specified. AI-generated image The next phase is data: availability, degradation, service cost, and customer economics across multiple sites. The Renmark installation is only the beginning. The useful story will come from the next 100 MWh of deployments, where AC1 has to prove that its architecture is repeatable and commercially boring in the best sense: installable, reliable, serviceable, and cheaper over its life. For CurrentCells, the signal is clear. Battery innovation is moving deeper into system design. The winning storage products will not only have good cells. They will use electronics, software, thermal management, safety design, and service models to squeeze more usable energy out of every installed dollar. Sources: Energy-Storage.news reporting on August 17, 2026, Relectrify project materials, ARENA More Energy Project documentation, and public information on AS/NZS 4777 grid connection certification.