Solar for glass manufacturers in Gujarat
Furnaces, tempering and processing lines make glass one of the most energy-hungry industries there is. Renesys builds rooftop and captive solar that makes the electricity side of that bill cheaper, on the large roofs glass plants already have.
The power problem for glass plants
Furnaces run on fuel, but the rest of a glass plant runs on electricity: batch handling, forming, annealing and tempering lines, cutting, grinding, coating, compressors and cooling. For processors (tempering, laminating, insulated glass units), electricity is often the biggest energy cost of all.
In Gujarat, most HT plants pay roughly ₹7.50–8.50 per unit once energy charges, FPPPA, demand charges and duty are added up. In a competitive market, every percentage point of cost matters.
Why solar fits glass plants
Very large roofs
Glass plants and warehouses have some of the biggest roofs in industry, with room for plants of 1 MWp and more.
Lines that never stop
Continuous operation uses every unit of solar power produced.
Room to grow
Once the roof is used, captive or group captive adds more solar power without a new building.
Built to last beside a furnace
Layouts keep modules clear of heat and exhaust, so they perform and age as they should.
Proof: 1.25 MWp rooftop plant for a glass manufacturer
A glass manufacturer in Patan district, North Gujarat, wanted to cut the electricity cost of its plant using its own roof space. Renesys delivered a turnkey rooftop plant on the running facility.
| Capacity | 1,250 kWp DC / 1,000 kW AC, rooftop, grid-connected |
| Technology | Mono PERC half-cut modules with string inverters |
| Commissioned | November 2024 |
| Renesys scope | Turnkey EPC: design, supply, installation, approvals and commissioning |
What we plan for in glass plants
- Heat and exhaust: modules are kept away from furnace stacks and hot-air vents, where heat would cut output and age components faster.
- Glass dust and cullet fines: a cleaning schedule based on what actually settles on the modules.
- Roof loading: a structural check first, because many glass-plant roofs span long distances.
- Safe working: permit-to-work coordination around furnaces and high-temperature zones.
What it could save
A 1 MWp rooftop plant in Gujarat produces around 14.5 lakh units a year. On a line that runs continuously, nearly all of it replaces grid power, which is over ₹1 crore a year off your power bill, with a typical payback of 3–5 years.
Illustrative figures. Your actual saving depends on your tariff, load pattern and roof. We work it out from your last 12 months of bills.
Frequently asked questions
Can solar replace fuel in our furnace?
No. Solar produces electricity, not heat. It cuts your electricity bill, which is still a large cost for any glass plant.
Is heat from the plant a problem for the modules?
It can be, near stacks and vents. We map the hot zones during the survey and keep modules clear of them.
We process glass rather than make it. Is solar still worth it?
Usually even more so. Processors depend almost entirely on electricity.
How big a plant can we install?
That depends on your roof area, roof strength and contract demand. We work it out from a survey and your bills.
Who maintains the plant?
We do, under an O&M contract that covers scheduled cleaning, monitoring and an annual performance report.
See if solar works for your plant
Send us your last 12 months of power bills. We’ll come back with a size, a saving and a payback estimate.