Reference designs from our engineering desk — each one sized, modelled and costed exactly the way your project will be. As installations are commissioned, they replace these with real photographs, meter readings and client names.
No reference designs in that category yet. Ask us — we will model your case.
Reference design 01 · Residential
A four-bedroom villa in Kokapet with a ₹7,800 average monthly bill, two air conditioners running most of the year and a 10 kW sanctioned three-phase connection.
The roof has a 620 sq ft usable terrace plus a 240 sq ft utility block, with a parapet and an overhead tank casting a moving shadow through the afternoon. The design splits the array across both surfaces on two MPPT trackers so the shaded string does not drag the clean one down — a detail that a single-string layout would have cost roughly 9% of annual yield.
| System size | 8 kW |
| Modeled annual generation | 11,600 kWh |
| Monthly bill before | ₹7,800 |
| Expected bill after | Fixed charges only |
| Central subsidy applied | ₹78,000 |
| Simple payback | 3.5 – 4.5 years |
| Installation window | 4 – 6 days |
| PV capacity | 90 kW |
| Storage | 100 kWh LFP |
| Modeled annual generation | 130,500 kWh |
| Critical load carried | OT, ICU, lab, servers |
| Changeover | Uninterrupted on protected circuits |
| Diesel displaced | Majority of routine outage running |
| Commissioning window | 5 – 7 weeks, phased |
Reference design 02 · Healthcare
A 120-bed multi-speciality hospital in Kondapur with round-the-clock load, two diesel gensets and an absolute requirement that theatres and ICU never see an interruption.
Healthcare is the clearest case for hybrid. The PV array flattens the daytime demand charge; the LFP bank carries protected circuits through a grid failure without waiting for a genset to crank; and the gensets stay as a third layer rather than the first response. The design maps every protected circuit explicitly, so nobody discovers at 2 am that the sterilisation unit was outside the back-up panel.
Reference design 03 · Industrial
A fabrication unit in Patancheru on an HT industrial tariff, with a 24,000 sq ft metal-sheet shed roof and a maximum-demand charge that dominates the bill more than energy consumption does.
Two thirds of the saving here comes from energy and one third from demand management — which is why the design pairs the array with a modest battery rather than simply covering more roof. Non-penetrative clamps suited to the existing sheet profile and purlin spacing avoid new roof penetrations entirely, which is usually the plant manager’s first objection.
| PV capacity | 180 kW |
| Roof used | ~14,400 sq ft of 24,000 |
| Modeled annual generation | 261,000 kWh |
| Share of consumption offset | Substantial daytime share |
| Saving sources | Energy + maximum demand |
| Structures | Non-penetrative sheet clamps |
| Delivery window | 6 – 9 weeks |
Reference design 04 · Wind-solar hybrid
An agri-processing unit near Mahbubnagar with an exposed site, a weak grid tail that drops out several times a week, and a load that continues into the evening.
This is the configuration that makes the strongest case for wind. The site has open exposure on its western side and reasonable measured wind speeds at 18 m hub height, and its load profile is exactly wrong for solar alone — peak demand after dark, and a monsoon season when PV yield falls away while wind holds up. With PV, a mast-mounted turbine and a modest LFP bank on one hybrid inverter, the site can run largely on its own generation and treat the grid as back-up rather than supply.
Also on the desk
Summarised. Ask for the full drawing set and generation model for any of them.
Three roof blocks, a purely daytime load and generous unshaded area — the closest thing to an ideal solar site. Modelled at 87,000 kWh a year against a consumption pattern that absorbs almost all of it on site, which is what makes campus payback the fastest we see.
Common-area load across four blocks — lifts, pumps, corridor lighting, STP and clubhouse. Metering designed so the society sees a single consolidated saving, with the housing-society subsidy rate claimed on the common-area capacity.
Fixed-tilt array on 5.5 acres with pile-driven foundations, row spacing set from a winter-solstice shading study, an 11 kV evacuation route and a weather station feeding the performance model. Modelled at roughly 1.74 GWh a year.
A cluster of borewell pumps for a farmer group, converted from unreliable grid pumping to direct solar drive with dry-run and over-voltage protection. Designed for daytime irrigation windows, with no battery and therefore almost nothing to maintain.
When it is built
So you know what we will be publishing about your project — and what we will be measuring ourselves against.
Capacity, module and inverter make and model, structure type, roof or land used, and the commissioning date.
The generation we predicted, the generation the meter recorded, and the performance ratio — published, not just filed.
Actual DISCOM bills either side of commissioning, with the client’s permission, rather than a projected saving.
A quote attributed to a named person at a named organisation. No stock photographs and no invented testimonials.
Be one of the first
Early clients get our full attention, direct founder involvement and a written performance commitment. Ask us what that looks like for your building.
