Free Tool

Solar BOM Generator

Generate a complete Bill of Materials for any solar system size and type. Get accurate quantities for panels, inverter, cables, MCBs, earthing, and more.

A 5 kW solar system using 545W panels needs 10 panels, a 5 kW inverter, DC/AC cabling, MCBs, surge protection, and an earthing kit — get exact quantities below.

Updated August 2026 Reviewed by the SolarOps360 Engineering Team

System Configuration

Get a complete equipment list for procurement or project planning.

Example: Bill of Materials for a 5 kW On-Grid system: 10 panels of 545W, a 5 kW inverter, and 11 component lines. Enter your own size and type above.

Showing an example — enter your details above for your own BOM.

Component Specification Qty
Solar Panels 545W Monocrystalline PERC 10 nos
Grid-Tie String Inverter 5 kW, Single-Phase (1Ø) 1 nos
Mounting Structure Rooftop Fixed Tilt 10 sets
DC Solar Cable 4 sq.mm As per run length
AC Output Cable 4 sq.mm As per run length
MC4 Connector Pairs IP68 rated 10 pairs
DC Distribution Box / MCB String protection, 5 string(s) 5 nos
AC Distribution Box / MCB Rated for 5 kW 1 nos
Surge Protection Device (SPD) DC + AC side 2 nos
Earthing Kit GI electrode + earthing wire 3 points
Bi-Directional Net Meter DISCOM approved 1 nos

Quantities are indicative planning estimates. Confirm exact specifications with your equipment vendor and site survey.

How It Works

How This Calculator Works

  1. 1

    Enter system size

    Enter the solar system capacity in kW (e.g., 5 for a 5 kW system).

  2. 2

    Select system type

    Choose on-grid (grid-tied, most common), off-grid (with battery backup, no grid), or hybrid (battery + grid).

  3. 3

    Select phase

    Choose single-phase (1Ø, for homes up to 5 kW) or three-phase (3Ø, for commercial or systems above 5 kW).

  4. 4

    Select mounting type

    Choose rooftop fixed tilt (most common), rooftop elevated, or ground mount. This determines mounting structure quantities.

  5. 5

    View and export BOM

    The complete BOM with quantities is shown instantly. Click "Export BOM" to download as CSV (for procurement) or PDF (for customer/project files).

FAQs

Frequently Asked Questions

What is a Solar BOM (Bill of Materials)?
A Solar BOM is a complete list of all equipment and materials required to install a solar PV system. It includes solar panels, grid-tie inverter, DC and AC cables, MC4 connectors, DC and AC MCBs, surge protection devices, earthing kit, mounting structure, and net meter. The BOM is essential for procurement, cost estimation, and site planning.
How many solar panels are needed for a 5 kW system?
A 5 kW solar system using 545W panels requires 10 panels (5000W ÷ 545W ≈ 9.17, rounded up to 10). With 400W panels, you would need 13 panels. The exact count depends on the panel wattage selected. Our BOM Generator calculates this automatically based on your inputs.
What inverter size do I need for a 5 kW solar system?
For a 5 kW on-grid solar system, you need a 5 kW string inverter. Standard inverter sizes in India are 1 kW, 2 kW, 3 kW, 5 kW, 8 kW, 10 kW, 15 kW, 20 kW, 25 kW, and 50 kW. For systems above 10 kW, multiple inverters or central inverters may be used.
What cable size is required for solar DC wiring?
For most residential solar systems (up to 10 kW), 4 sq.mm DC solar cable is standard for string wiring. For systems above 10 kW or with long cable runs, 6 sq.mm or higher may be needed. AC output wiring uses 4–10 sq.mm based on inverter rating and distance to the main panel.
What earthing components are needed for a solar system?
A standard solar system earthing kit includes a GI earthing electrode (pipe or plate type), GI earthing wire (6–16 sq.mm), earthing clamps, and earthing compound. Separate earthing is required for the panel mounting structure, inverter body, and DC system — at minimum 3 earthing points for residential systems.

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