Solar for the whole building. Backup for every home.

Fusion is one engineered system for the whole building: shared solar panels on the roof, one shared lithium battery bank, and a patented SPDU for each flat and office that gives it its own metered share. Your home runs on sunshine through the day, on stored sunshine into the night, and stays on through power cuts. Only when your share is used up does the SPDU move you to your own grid connection, seamlessly, until the next day.

With Fusion, your whole home keeps running on the shared battery bank: lights, fans, fridge, Wi-Fi, even the AC and geyser, sized to your building's actual loads. Your SPDU handles the switching automatically, so there is nothing to press or reset. This is the big difference from ordinary grid-tied solar, which must switch off during an outage, and from a home inverter or UPS, which backs up only a few circuits.

Every flat and office has its own SPDU in the meter room, and each unit's fixed share, decided together with the society at design time, is enforced by that unit's own hardware. Every share is separately metered, and you can see your balance and usage live on the Nova app. No neighbour can use your share.

Cost depends on your roof, your loads and how many units participate, so we start with a free rooftop feasibility survey and give a detailed proposal. As a rule of thumb, Fusion pays for itself in about 5 years for homes and about 3 years for commercial establishments, without any subsidy, and the panels keep producing for decades after that. Financing is available through our lending partners with zero processing fees.

We use lithium iron phosphate (LFP) batteries, the same safe, stable chemistry used in electric buses and grid storage. The bank carries a 10-year warranty and a 20-year rated service life, and it lives in a ventilated battery room, professionally installed and monitored. Compare that with the lead-acid inverter batteries most homes replace every 3 to 5 years.

Yes. For residential societies in Maharashtra we also offer shared grid-tied solar under the state's Grid Connected Micro-Grid framework: the same shared roof and the same fair SPDU sharing, without storage. It costs less and still cuts every bill, but like all grid-tied solar it pauses during a power cut. Most societies compare both and choose Fusion for the backup.

Subsidies like PM Surya Ghar apply to individual net-metered connections, not to a shared hybrid system like Fusion. We deliberately engineered Fusion so the numbers work without any subsidy: the shared battery bank, one hybrid inverter and one roof used as one plant is what makes it pay back in about 5 years on its own. Where a subsidy does apply, such as individual grid-tied systems, we will show you that option honestly in the proposal.

Participation in Fusion is flat by flat: each participating home contracts and pays for its own share, and the society contracts the common-area system. Rooftop use is a society decision, usually passed in a general body meeting per your byelaws. Our guide for Pune housing societies walks through each step. We support the committee with presentations, workings and documentation, and handle the paperwork after that.

We do. One annual maintenance contract for the whole building covers panel cleaning, battery health, performance monitoring and prompt issue resolution, instead of every flat chasing its own UPS vendor. Dust alone can cut generation by up to 25 percent, so maintenance is what protects your savings.

No. All work happens on the rooftop, in the battery room and in the building's meter room. Nobody enters your home, and a typical retrofit is completed in about 3 months including approvals.

Yes. Commercial establishments see the fastest economics, with payback in about 3 years. Daytime businesses use solar exactly when it is generated, the battery offsets expensive evening power, and the diesel generator stays off during cuts while workstations and servers keep running.