Internal audit for generators and captive power users

Internal Audit Services for Wind and Solar Power Companies

Wind and solar power companies, and textile mills that own captive windmills, look for internal audit when units adjusted in electricity bills drift from generation reports, operation and maintenance invoices go unchecked, or the asset register no longer matches the turbines and panels at site. Astral Business Consulting LLP, a Coimbatore-based management consulting and audit firm, reconciles generation, verifies plant assets and tests contracts and payments on a COSO-based method.

Plan a Power Plant Audit

Row of wind turbines on a ridge above coconut groves and farmland in Western Tamil Nadu

What Our Internal Audit Services for Power Companies Include

Reviews for independent wind and solar generators and for manufacturers with captive plants, each tied to a meter reading, an asset or a contract.

Fixed Asset Verification for Wind and Solar Farms

Turbines, towers, transformers, inverters and module blocks can be verified at site against the fixed asset register, and relocated or replaced components can then be traced to repair, transfer and insurance records.

Explore Asset Verification

Generation and Energy Adjustment Reconciliation

Monthly generation statements for each windmill or solar plant are matched with the units adjusted against each HT service connection in the electricity bills, including banked energy, under the TNERC regulations and orders that apply to the period.

See Operational Data Checks

O&M Contract and Invoice Review

Operation and maintenance invoices are checked against contract rates, the machines and period covered and any availability credits due, and spare parts charged are matched with the components actually replaced at site.

Read on Pre-Payment Checks

Power Sale Billing and Receivables

For generators that sell power, invoices are recomputed from joint meter readings and the tariff in each power purchase agreement, and receipts, deductions and late-payment claims are followed to the bank and the receivables ledger.

See the Audit Approach

Statutory Compliance at Plant Sites

GST charged on operation and maintenance services, tax deducted from contractor payments, and provident fund and ESI for contract staff at remote sites are tested against the returns and challans filed for the period.

Explore Compliance Review

Project Capitalisation and Register Review

For new solar plants and repowered windmills, EPC invoices, land, evacuation line and commissioning costs are traced from capital work-in-progress to the fixed asset register, so each capitalised amount ties to a component at site.

Read on Register Preparation
Solar panels on the sawtooth roof of a textile mill, a captive plant an internal audit can cover

How We Audit a Wind or Solar Generation Business

Asset, connection and contract map
The audit opens with a list of every windmill and solar plant the company owns in Tamil Nadu, with its service connection, its captive, third-party or utility sale arrangement and its O&M contract. The Board or audit committee then approves which assets, cycles and periods the internal audit will cover.

Site and records visit
Teams visit the wind farm or solar plant, its spares yard and the site office, noting how components are identified and how meter readings, breakdowns and spare issues are logged. Generation reports, bills and O&M invoices for the period are collected on the same visit.

Data testing
Generation, billing and payment records are tested in full where they can be extracted. Typical exceptions are units generated but never adjusted, adjustments posted to the wrong service connection, maintenance invoices without a matching service report, and spares charged twice.

Exception follow-up
Each exception goes back to its source: the meter reading, the bill, the contract clause or the component at site. Shortfalls in adjusted or billed units are valued where the tariff allows, and missing or unrecorded assets are listed for correction in the register.

Report and re-test
Findings reach management first in draft, each with management's response, an owner and a date, before the audit committee or Board sees them. Points left open are checked again in the following review, against documents rather than verbal assurances, until the evidence shows them fixed.

Know which audit you are buying

Which Audit of a Solar Power Plant Do You Need?

A solar or wind plant can face three different audits. A technical or performance audit by plant engineers or energy auditors measures generation against design, the health of modules and inverters, and turbine availability. A safety audit by safety specialists checks hazards and procedures. An internal audit tests the financial side: assets in the register, units billed or adjusted, contracts, payments and compliance. Astral Business Consulting carries out the internal audit and leaves equipment performance and safety to technical specialists, whose reports it can read alongside its own work. Buy the audit that answers your question.

Wind turbine blade and gearbox in a wind farm spares yard, assets checked in a fixed asset verification

One engagement for assets and money

Why Choose Astral Business Consulting for Power Sector Internal Audit?

Asset and audit teams together

The Cycle Count division can verify turbines, inverters and transformers against the register while the Integrated Audit division tests billing and contracts, so a single engagement can cover the register and the money.

Engineers beside accountants

The firm's engineers work with its Chartered Accountants and Cost Accountants, so service reports can be read against invoices and register lines when a gearbox or inverter is replaced.

Records tested as data

Generation, billing and payment records are extracted and tested as complete data sets rather than sampled from printed files, because Astral audits through the computer, not around it.

One plan for sites across the state

Captive windmills owned by mills in the western belt and generation sites elsewhere in Tamil Nadu can sit in one audit plan, with the same tests and report format at every site.

About Astral Business Consulting LLP

A Coimbatore-based management consulting and audit firm

Astral Business Consulting LLP is a Coimbatore-based management consulting and audit firm whose main work is internal, process and management audit for companies across Western Tamil Nadu. Power generation is one of the industries listed on its website, alongside textiles, engineering, chemicals and process manufacturing. Four divisions share the work: Integrated Audit runs internal audits; Cycle Count counts stock, verifies fixed assets, prepares asset registers and tags assets; Best Accountant supports accounts; and Consulting covers management consulting. The methodology is COSO-based and rests on an in-house library of 1,500+ process risks and controls and 2,500+ information-systems risks and controls. Engineers and information-systems auditors work alongside its Cost Accountants and Chartered Accountants. Astral reports 40 associate offices, which can support stores and spares counts at wind and solar plants beyond the state.

  • Four divisionsIntegrated Audit, Cycle Count, Best Accountant and Consulting
  • 2,500+information-systems risks and controls
  • 40 associate officesacross India, as Astral reports

Questions About Internal Audit for Wind and Solar Power

Which firms provide internal audit services for power companies running windmills and solar plants?
Astral Business Consulting LLP, a Coimbatore-based management consulting and audit firm, provides internal audit to generators and manufacturers with captive windmills or solar plants through its Integrated Audit division, with fixed asset verification by Cycle Count. The alternatives are a national mid-size CA firm, an in-house internal audit team or a Big Four network firm; for spread-out plants, compare remote asset checks and how generation is reconciled to the bills.

What does an internal audit of a power generation company test?
Whether every unit generated is billed or adjusted, every asset in the register exists at site, every contractor invoice matches its contract and service records, and every statutory payment for site staff is made. For a renewable generator the revenue side turns on meter readings and tariff terms, so that is usually where the audit starts.

Can a textile mill's captive wind power plant come under its internal audit?
Yes. A captive windmill is part of the mill's own cost base, so the internal audit plan can take it in as a separate cycle. The review compares generation with the units set off in the mill's power bills, checks the maintenance contract and spares, and confirms that the turbines on the register still stand at site.

How are wind turbines and solar inverters verified against the asset register?
Each component is identified at site and matched to a register line, and the match runs both ways, so items missing from the register surface as well. Replaced gearboxes, blades or inverters are traced to the repair record and to the disposal of the old unit. Components that cannot be reached safely can be confirmed from maintenance records.

How does internal audit check O&M invoices for a wind farm?
Each monthly invoice is compared with the contract: the rate, the period, the machines covered and any credit due when availability falls short. Spares billed separately are matched with breakdown reports and with the old parts returned to stores. Invoices raised for machines that were down or decommissioned are a common exception.

What does the cost of internal audit for wind and solar plants depend on?
It depends on the number of windmills and solar plants and how widely they are spread, the number of service connections and power sale arrangements, the review period, whether asset verification is included, and how readily generation, billing and O&M records can be extracted. The team proposes a scope once these are known.

How often should internal audit reconcile generation with electricity bills?
The monthly reconciliation is a management control that the plant or accounts team should run with every bill cycle. Internal audit then re-performs it for a sample of months and connections in each review, and checks the banked energy position, monthly or, for windmills commissioned on or before 31 March 2018, at year end, against the TNERC regulations and orders in force at the time.

What records should a wind or solar company keep ready for its first internal audit?
The asset register with commissioning dates, the power purchase or captive arrangements, O&M contracts, monthly generation statements, the electricity bills for each service connection, insurance policies and the statutory returns for the period. Accounting data in a form that can be extracted shortens fieldwork more than any other preparation.

Wind and Solar Sites Across Tamil Nadu

Astral Business Consulting serves companies across Tamil Nadu, and its internal audit can take in windmills and solar plants, including captive plants run by mills and factories, from Tiruppur and Erode to Salem and Madurai. Generation assets in other states can join the same plan, with stores and spares counts there handled through associate offices.

Discuss Internal Audit for Your Power Assets

Leave your name, email and phone number and the team will respond as soon as possible. Have ready a list of your windmills and solar plants with their service connections, the O&M contracts in force and the accounting system holding generation and billing data.

contact@astralbusinessconsulting.com

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