Engineering hub
Engineering Hub: System Design, Drawings & BOQ
Enter the duty, or describe any requirement and attach the drawing. AutoCAD, PDF, a spreadsheet or a photograph is accepted. The desk sizes what it can from NBC 2016 Part 4, IS 15105, IS 3844, IS 13039, TAC, NFPA 13, NFPA 20, IS 732, IS 3043, IS 2189, ISHRAE and ASHRAE 62.1, draws the P&ID or single-line diagram, the scaled plan, both elevations, section A-A and the isometric, and writes the bill. A PEB shed takes length, width, eave, bay, slope, basic wind speed, crane and cladding, and draws the framing plan, the anchor bolt plan, both elevations, section A-A and a rotatable 3D model. Fire suppression and fire detection sit under Fire protection, not as a separate project type. A mark you add on the sheet is saved with the download. A licensed engineer still stamps the issue.
Choose project type
Solar is selected. The subcategories for this type are under this list. The drawing and the bill further down are the existing type page. A catalogue price is used when it matches. Otherwise a published Indian rate plus 20% is shown with its source. Erection is 10% of that system's materials, testing 2%, and transport 3%.
Subcategories
Each subcategory has its own design basis, calculation, drawings, bill and quotation.
Drawing is listening

Rev A
SHEET 1 OF 6
Calculation
| Part | Formula | Working | Result | Standard |
|---|---|---|---|---|
| Array | kWp = daily kWh / (peak sun hours × performance ratio) | Roof limit 110.0 kWp. Load-side 591.7 kWp. The array is sized to 110.0 kWp, then counted in 540 Wp modules so the installed array is not under that figure. Sun hours 5.2, PR 0.78. | 110.16 kWp · 204 modules · 446.8 kWh/day | IEC 61215 / IEC 62109 |
Design basis
| Part | Specification | Standard |
|---|---|---|
| PV module 540 | 204 modules × 540 Wp = 110.16 kWp. The count is rounded up so the array is not under the required output. | IEC 61215 |
| solar inverter 100 | 2 × 100 kW, the next standard inverter at or above 110.16 kWp. | IEC 62109 |
| module mounting structure | Roof structure, one catalogue line is 1 kWp. | IS 800 |
| DC cable | String cable, 2 m a module, 408 m. The catalogue figure is a per-metre rate, not a drum. | IEC 62930 |
| AC cable | AC run from the inverter, billed in metres. The catalogue match is a per-metre rate. | IS 7098 |
| Cable gland | Glands at the inverter and the AC isolator. 25 mm is the published gland. | IS 12943 |
| Cable lug | 70 mm² lugs for the AC tails. 70 mm² is the termination allowance. | IS 8309 |
| MC4 | One male-female pair a module. The published price is a pair, so the quantity is the module count, not two pieces. | IEC 62852 |
| Junction box | DC combiner, about one per 20 modules. The published box is a 4-in 4-out 1000 V DCDB. | IEC 62548 |
| Cable tray | Tray from the array to the inverter. This is not the building tray. | NBC Part 8 |
| Testing | Solar testing and commissioning. 2% of this system's material subtotal, ex-GST. GST 18% is added on this allowance. | Site practice |
| Erection | Solar erection and installation labour. 10% of this system's material subtotal, ex-GST. GST 18% is added on this allowance. | Site practice |
| Transport | Solar transport and freight. 3% of this system's material subtotal, ex-GST. GST 18% is added on this allowance. | Site practice |
Solar BOQ
Proactive Industrial Private LimitedGSTIN: 24AAQCP1475R1ZLRegistered office: C-119, Siddhivinayak Business Tower, Makarba, Sarkhej, Ahmedabad, Gujarat 380051Branch offices: Vadodara | Padal (Kheda) | BharuchSupply
PV module 540
204 modules × 540 Wp = 110.16 kWp. The count is rounded up so the array is not under the required output. · IEC 61215
204 no. × —
GST —
Amount —
solar inverter 100
2 × 100 kW, the next standard inverter at or above 110.16 kWp. · IEC 62109
2 no. × —
GST —
Amount —
module mounting structure
Roof structure, one catalogue line is 1 kWp. · IS 800
110.16 kWp × —
GST —
Amount —
solar DC cable 4 sqmm 1 core copper
String cable, 2 m a module, 408 m. The catalogue figure is a per-metre rate, not a drum. · IEC 62930
408 m × —
GST —
Amount —
power cable 16
AC run from the inverter, billed in metres. The catalogue match is a per-metre rate. · IS 7098
220 m × —
GST —
Amount —
brass cable gland 25 mm
Glands at the inverter and the AC isolator. 25 mm is the published gland. · IS 12943
4 no. × —
GST —
Amount —
aluminium cable lug 70 sq mm
70 mm² lugs for the AC tails. 70 mm² is the termination allowance. · IS 8309
8 no. × —
GST —
Amount —
MC4 connector pair
One male-female pair a module. The published price is a pair, so the quantity is the module count, not two pieces. · IEC 62852
204 pair × —
GST —
Amount —
solar DC combiner box
DC combiner, about one per 20 modules. The published box is a 4-in 4-out 1000 V DCDB. · IEC 62548
11 no. × —
GST —
Amount —
cable tray 300
Tray from the array to the inverter. This is not the building tray. · NBC Part 8
3 length × —
GST —
Amount —
transport to site
Solar transport and freight. 3% of this system's material subtotal, ex-GST. GST 18% is added on this allowance. · Site practice
1 lot × —
GST —
Amount —
Supply subtotal—
Installation
testing and commissioning
Solar testing and commissioning. 2% of this system's material subtotal, ex-GST. GST 18% is added on this allowance. · Site practice
1 lot × —
GST —
Amount —
erection and labour
Solar erection and installation labour. 10% of this system's material subtotal, ex-GST. GST 18% is added on this allowance. · Site practice
1 lot × —
GST —
Amount —
Installation subtotal—
GST —
Grand total —
Supply is the material and the transport. Installation is erection, testing and commissioning, and the other site services. Each section has its own ex-GST subtotal. GST and the grand total follow. A catalogue match is used when the catalogue has a price. Where it does not, the rate is a published Indian marketplace or maker price plus 20%, and the source is on the line. Every material rate is ex-GST, and GST at 18% is added on it. A published price that already included GST is converted to the ex-GST figure and 18% is shown separately. Erection and installation labour is 10% of that system's material subtotal, testing and commissioning 2%, and transport 3%, with GST at 18% on those allowances.
Freight
Ahmedabad to Vadodara · about 131 km · chargeable 150 kg
Freight ₹1,800 ex-GST · GST ₹324 · Payable ₹2,124
Road part-load from the pincode. Chargeable weight is the higher of actual kg and 300 kg per cubic metre. Confirm the truck before a PO.
- 2,000 m² is the area of one floor, 2 floors, 8 m height. Sprinkler heads, sprinkler branch pipe and smoke detectors are that floor counted again on every floor. The sprinkler pump stays on the remote design area.
- Prices on the quotation are ex-GST. A catalogue match is used first. Where the catalogue has no price, a published Indian rate plus 20% is used and the source is on the line. GST at 18% is added on every material line. A price the source already quoted including GST is converted to the ex-GST rate and 18% is shown separately. Erection and installation labour is 10% of that system's material subtotal, testing and commissioning 2%, and transport 3%. GST 18% is added on those allowances.
- Standards cited on this desk: NBC 2016 Part 4, IS 15105, IS 3844, IS 13039, TAC, NFPA 13, NFPA 20, IS 732, IS 3043, IS 2189, ISHRAE and ASHRAE 62.1.
Get this designed & installed by us
Statutory
- This is an enquiry BOQ, not a sanctioned design. A licensed consultant stamps the drawing before construction.
- Net metering is with the DISCOM. The electrical inspector (CEIG) clears the plant where the state rule requires it. Use ALMM modules when the tender or the DISCOM asks. Earthing is IS 3043.