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BOS & EPC

We build the plant and the parts inside it.

Survey, engineering, fabrication, installation and commissioning under a single contract — with the balance of system built in our own workshop before it reaches your roof.

Rooftop solar array installed and commissioned by S P Alectricals
Scope of work

What happens, and what you receive

The same four stages run on every project, whether it is a 10 kWp hostel or a 400 kWp medical university. Only the scale changes.

Scope of work by stage, with deliverables
StageWhat we doWhat you receive
01Site Survey & Drawings Our engineers survey the site and prepare all drawings and the electrical single-line diagram to match it. Every aspect of the site is studied before anything is ordered.
  • Site survey
  • Electrical SLD
  • Layout drawings
02Design & Fabrication The mounting system, protection unit, combiner box and the other parts the site needs are designed and manufactured at our own workshop, then the complete balance of system is transferred to site.
  • Mounting system
  • Protection unit
  • Combiner box
03Structure & Module Installation The module mounting structure and the modules themselves are installed as per the plan, built to suit the site’s aesthetics and conditions.
  • Structure erection
  • Module mounting
04Electrical Installation The PCU, AJB, ACDB, DCDB and remaining accessories are installed as per plan, and the plant is commissioned and handed over.
  • PCU
  • AJB
  • ACDB & DCDB
  • Commissioning

Scroll the table sideways to see all three columns.

What “balance of system” means

Everything in a solar plant except the modules themselves — and all of it is made by us.

  • Mounting systemThe galvanised structure the modules sit on
  • Protection unitACDB, DCDB and fuse panels
  • Combiner boxArray junction box with surge protection
  • Power conditioningThe PCU that ties generation, storage and load
Made in-house

The balance of system, fabricated by us

How we work

Engineering, procurement and construction

Our EPC team has experience and expertise in EPC services for more than four to five years.

The team studies every aspect of the site and installs it in the best possible way. We survey the site first and plan every part of the plant, then prepare the balance of system at our workshop to suit the site’s aesthetics and conditions — so the plant gives maximum output once installed.

The entire protection unit, mounting system and other accessories are designed and manufactured at our own factory by our engineering team. That is the difference between buying a plant and having one built: the equipment and the installation are matched to each other, because the same people are responsible for both.

Solar modules, lanterns, LED street lights, batteries and control units manufactured at the Ranchi workshop
Part of the range built at our Ranchi workshop
On site

The process, run for real

Installation at Deputy Commissioner's Office, Simdega · 60 kWp
Deputy Commissioner’s OfficeSimdega · 60 kWp
Installation at Girls Hostel, MGM, Jamshedpur · 35 kWp
Girls Hostel, MGMJamshedpur · 35 kWp
Installation at Sadar Hospital, Daltonganj · 60 kWp
Sadar HospitalDaltonganj · 60 kWp
Installation at Sadar Hospital, Ramgarh · 100 kWp
Sadar HospitalRamgarh · 100 kWp