Solar PV Costing Calculator

Project Input

Project Name

Used as the project reference in the estimate, print BOM, and CSV export.

Grid Type

Identifies the electrical service type for inverter/protection reference.

Solar PV System Type

Determines inverter, protection, batteries, and balance-of-system materials.

Roof Type

Galvanized roof uses L-foot. Slab roof uses concrete ballast.

Required Inverter Capacity

Input required capacity in kW. The calculator will select the nearest higher available inverter capacity.

Number of Solar Panel Strings

DC Breaker and DC SPD quantity will follow this value.

Supplier Preference

New estimates and item selections will prioritize the selected supplier.

Loading materials from Google Sheets...

Note: After generating the Writeshop Solar estimate, every BOM row can be edited. You can override quantity, unit cost, remove any material, or manually select a replacement item from the same Google Sheets tab. Values are saved locally and restored after browser reload/reopen unless Reset is clicked.

Bill of Materials Cost Estimate

Project Name-

Grid Type-

System Type-

Roof Type-

Capacity / Strings-

Total Materials Cost₱0.00

Manual Material Selection

Material Name

Material Category

Google Sheets Tab

Select Item from Tab

Qty

Use this when you want to add materials not automatically included in the BOM, or when you want a specific item from your Google Sheets database.

Material	Manual Item Selection	Supplier	Capacity / Spec / Remarks	Qty Override	Unit Cost Override	Total Cost	Action
Grand Total						₱0.00

Add Content Data to Google Sheet

Material Category

Target Google Sheet Tab

Brand

Model

Supplier

Capacity

Spec

Cost

Remarks