How a home system is planned
The plan starts with the units on your electricity bill, not the rupee total. The calculator on this site assumes about 120 units of generation per kW each month and suggests a size from your average monthly units. You can choose a smaller or larger whole-kW size, and the budget and generation update for your choice.
A normal grid-connected system draws from the grid when solar output is low and does not provide backup during an outage. Battery or backup equipment is priced as a separate item where you ask for it. A site assessment and a written quotation come before any final size is agreed.
Planning budgets for 1, 2 and 3 kW
| Capacity | Budget before subsidy | Potential subsidy | Budget after potential subsidy |
|---|---|---|---|
| 1 kW | ₹70,000–₹85,000 | ₹35,000 | ₹35,000–₹50,000 |
| 2 kW | ₹1.30 lakh–₹1.55 lakh | ₹70,000 | ₹60,000–₹85,000 |
| 3 kW | ₹1.80 lakh–₹2.20 lakh | ₹1,00,000 | ₹80,000–₹1.20 lakh |
These are planning ranges that follow the Tamil Nadu solar portal, not an Arc Solar quotation. Subsidy is paid after approval, so budget for the full installation cost upfront. Larger systems are covered in the cost guide and the sizing guide.
Subsidies that may apply to a home
Residential connections can be eligible for central PM Surya Ghar assistance and Tamil Nadu assistance. Tamil Nadu support applies to the first 1 lakh eligible beneficiaries registered on the PM Surya Ghar portal from 5 August 2026, subject to allocation and approval. Check the dated conditions in the subsidy guide before you count on any amount.
From enquiry to quotation
- Enter the units from your electricity bill in the estimate calculator and choose Home.
- Pick a suggested size or choose your own kW.
- Download the budget PDF without sharing contact details, or request a callback with your estimate attached.
- Arrange a site assessment of your roof, shade, access and electricity connection.
- Review a written quotation that lists equipment, scope, exclusions and payment stages.
What changes the price
- System size and the panel and inverter models chosen.
- Mounting structure, electrical protection, earthing and cabling for your roof.
- Extra roof work, long cable runs or access equipment.
- Battery and backup equipment, if you want them.
- Taxes, statutory charges, approvals and metering responsibilities.
Ask every installer for the same specification so quotations can be compared fairly. The installer checklist lists what to ask.
Where Arc Solar works
Home enquiries are welcome from Pernambut, Vellore, Ambur, Gudiyattam, Vaniyambadi and across Vellore, Tirupattur, Ranipet, Chennai, Kanchipuram. These are service areas, not separate branches. See the service areas page for how enquiries from each district are handled.
Ask about your roof
Use the estimate calculator to see a budget, or contact Arc Solar by phone, WhatsApp or email.