The operating system for Indian solar EPCs

From the customer's electricity bill
to collected cash.

Upload a DISCOM bill and walk out with a policy-correct plant size and a bankable proposal in ten minutes. Then run the design, the bank DPR, the project, procurement, GST billing and collections in the same place — the way an Indian EPC actually works.

Audit a bill free Book a 15-minute demo

14 days free · No credit card · Built by solar professionals with 150+ MWp delivered across rooftop and open access

SunBiz bill audit — rooftop sizing for a Maharashtra HT consumer with the storage mandate applied, hour-by-hour dispatch and the regulations cited

A real audit: a 1,050 kVA Maharashtra HT consumer sized to the net-metering cap, the April 2026 storage mandate applied, every rule cited.

10 min

Bill to bankable proposal

3 states

Regulations modelled, sourced

8 phases

59–87 tasks per project

1 tool

Sales, design, finance, site

One flow, one tool

Everything between the bill and the bank

Sales, engineering, finance and site in one system of record — so the proposal, the DPR, the schedule and the invoice never disagree.

Bill audit

Upload the DISCOM bill. Tariff checks, PF and demand findings, and a policy-correct plant size — rooftop and open access — with every rule cited.

3D design

Roofs, obstacles, shadows, panel layout and a 3D impression — exported straight into the proposal.

Proposal

Branded, bankable proposal with savings slot by slot against the real ToD tariff, in minutes.

Bank DPR

Detailed project report for the lender: IRR, DSCR, payback, annexures — generated, not typed.

Project

Lead converts to a project with 59–87 tasks across 8 phases, Gantt, Kanban, site DPRs from the field.

Procure & bill

GST-ready POs, PIs, MRNs, item catalogue, milestone billing tied to commissioning, receivables ageing.

Get paid

Payments ledger, client portal with documents and invoices, automatic reminders. Cash, not chaos.

Bill audit & sizing

Reads DHBVN, UHBVN, MSEDCL, GUVNL bills. Finds billing errors and PF/CD savings. Sizes rooftop and open-access plants hour by hour under the state's ToD, banking, net-metering caps and storage mandates.

3D design & layout

Draw roofs and obstacles, set pitch and azimuth, place tables with inter-row shadows, and export a 3D impression into the proposal.

Proposals & bank DPRs

Branded proposals with savings against the real tariff, and bankable DPRs with IRR, DSCR and payback for the lender — from the same inputs.

Projects, 8 phases

59 to 87 tasks auto-generated per project type, re-planned when the commissioning date moves. Gantt, Kanban, RAG status, site DPRs from mobile.

Procurement & GST documents

Purchase orders, proforma invoices and material receipts with line-item GST, atomic numbering, an item catalogue that learns from every order.

Milestone billing & receivables

Bill against delivery and commissioning milestones, retention tied to COD, payment ledger, ageing, TDS and automated client reminders.

Roles that match an EPC

Owner, PM, engineer, sales, procurement, accountant, field, client — each sees exactly their work and money, nothing else.

Isolated workspaces

Every company in its own tenant, capability-based permissions, audit of who changed what. Built for a team, priced for a small one.

Built on the regulations, not around them

Every number carries its order, and how sure we are of it

ToD slots, banking rules, net-metering caps, open-access charges and storage mandates change every year. SunBiz models them state by state, cites the regulation on the page and in the report, and marks each figure CONFIRMED, PARTIAL or UNVERIFIED — so your proposal survives the DISCOM and the bank.

Haryana

HERC ToD, 30% monthly banking at 8% in kind, 500 kW net-metering cap, OA capped at contract demand, no storage mandate

Maharashtra

MSEDCL ToD with solar-hour rebate and evening peak, rule-C slot-locked banking, 5 MW net metering, 1 MWh/MW storage mandate from April 2026

Gujarat

GERC ToU, cash banking charge, 1,000 kW net metering, third-party OA held to contract demand

Coming next

Rajasthan, Uttar Pradesh, Punjab — same method, same sourcing

What an EPC needsSunBizGeneric tools

Size a plant from a DISCOM bill under the state's ToD and banking rules

Apply net-metering caps and storage mandates, with the order cited

Proposal and bank DPR from the same inputs

Project plan that re-schedules when the COD moves

GST POs / PIs / MRNs with milestone billing and retention

Generic task boards and spreadsheets

Mobile-first for field teams

Your engineers work in the field.
So does SunBiz.

Field engineers log daily progress, update tasks, upload site photos and material receipts from their phone. The owner sees the schedule move, the accountant sees the milestone come due, the client sees the portal update — from one entry.

Daily progress reports with photos, from the site
Task status and material receipts (MRN) from a phone
Document vault and client portal updated from one entry
Works on any phone — no app to install

Pricing

Simple, transparent pricing

Every plan includes the bill audit, design, proposals, DPRs, projects, procurement, billing and the client portal. 14-day free trial, no credit card.

Starter

₹2,999/month

or ₹29,990/year · + 18% GST

5 projects running at once

10 users

5 GB file storage

All features included

Start Free Trial

Bring one real bill. Leave with a proposal.

Fifteen minutes with your own customer's electricity bill is the fastest way to see what SunBiz does. No migration, no setup — the rest of the suite is there when you want it.

Start the 14-day free trial

From the customer's electricity billto collected cash.