Solar for Jamnagar's brass parts units

A cluster of small sheds, not a few big plants

The MSME-DI profile of the district names brass parts as Jamnagar's main export item and its one identified small-industry cluster, at roughly 3,500 units. Its estate table gives the land of the three Jamnagar GIDC estates as 51, 136 and 178 hectares. Those figures date from around 2011, but the picture they paint still holds: most units are small, sit side by side, and share walls and access roads.

That has a direct effect on solar. On a small shed, roof area and shade will usually limit a plant to tens of kilowatts, not hundreds. Below 10 kW, GERC's 2024 amendment removes the technical feasibility study, which shortens the approval for the smallest units.

Plot and shed sizes vary a lot between Dared, Udyognagar near Shankar Tekri and older pockets such as Patel Colony and Hapa, so a neighbour's plant size tells you little about yours. Wherever you are, check for shade from the neighbour's higher wall, water tanks and overhead lines before you count roof area.

Turning, extrusion and plating: where the units go

Automatic turning machines, CNC lathes, threading and drilling machines draw a modest, very even load for as long as the shift runs. That is the ideal profile for solar, because almost every unit the roof makes is used on the spot.

Extrusion and hot stamping need heat. If your billets or scrap are melted or heated in an electric induction furnace, that furnace will dominate your bill and solar will only cover part of it. If they are heated with oil or gas, the fuel side is outside what solar can help with. Units that melt their own scrap should expect the furnace, not the machines, to set the size of their bill.

Electroplating lines run on rectifiers that pull a steady current for hours, plus pumps and extraction fans. These are good daytime loads. On LTMD, GERC's rules set solar off against use from 7 am to 6 pm over the billing cycle, so daytime plating benefits and night plating does not.

Salt air plus plating fumes

Jamnagar's estates are a short distance from the Gulf of Kutch, and on many days the wind brings salt inland. Inside the cluster, acid fumes from pickling and plating add to it. Together they rust ordinary mild steel frames and plain bolts within a few seasons.

Ask for a hot-dip galvanised or anodised aluminium structure, stainless steel fasteners, and panels certified for salt mist under IEC 61701. Keep the array away from plating exhaust outlets. Have the earthing and junction boxes opened and checked once a year. Because the coast here sees strong winds in cyclone years, the frame should be designed for your site's basic wind speed under IS 875 (Part 3), not just bolted on.

Water and cleaning in the estates

The MSME-DI profile lists water shortage as the main constraint of the GIDC estates. Panels near a brass shed pick up metal dust and soot, and salt leaves a film, so they need regular washing. Plan a small storage tank for cleaning water and use soft or RO water for the final rinse, because hard borewell water leaves spots on the glass.

Shared sheds and the PGVCL offices

GIDC lists Jamnagar III among the first locations of its multi-storeyed flatted sheds, where many small units share one building. Group or virtual net metering is not in force in Gujarat (GERC's draft regulations of 2026 propose it), so for now a shared roof can usually connect solar only to one meter, often the common services meter. Talk to the building's association before planning a plant there.

Units in the estates deal with PGVCL's GIDC sub-division, which sits in the Jamnagar City-2 division. Hapa and Patel Colony have their own sub-divisions under City-1, and high-tension connections are handled by the HT sub-division. Your bill names the one that will inspect your plant.