20 kW solar system
20 kW Solar System Installation in Chennai and Tamil Nadu
Discuss a complete 20 kW solar system for your property with Heliostrom. The right proposal begins with electricity usage, rooftop suitability and whether your requirement is daytime generation, backup for selected loads or both.
Explore our commercial solar solutions to understand the assessment process, then share your property details for a project-specific discussion. The system price should clearly identify equipment, installation and any separately priced battery or electrical work.
Suitability
Does Your Property Need a 20 kW Solar System?
A 20 kW system should be assessed against actual use rather than the number of rooms or appliances alone. Review daytime consumption, available area and connection details before choosing between an on-grid and a battery-supported arrangement.
Consumption
Review recent bills and when electricity is used.
Roof conditions
Assess usable area, shade, structural suitability and safe access.
Connection
Confirm the installation and integration requirements for the property.
Backup
Identify essential loads and required backup duration separately; battery capacity is not defined by solar panel capacity.
Generation and space requirements should follow the proposed layout and site assessment. Review annual output with stated weather, shade and system-loss assumptions. Distinguish module capacity in kWp DC from inverter or output capacity in kW AC.
Price and inclusions
20 kW Solar System Price and Package Inclusions
A complete quotation should make clear whether the system is grid-connected or includes storage. Battery-supported configurations can involve different equipment and costs, so compare equivalent packages rather than one headline price.
Indicative market budget · planning estimate, Nov 2026
Indicative market budget: ₹9.6–₹10.8 lakh for a 20 kW grid-connected rooftop installation. This is a planning estimate, not a Heliostrom quotation. Final pricing follows site assessment and written scope.
Package inclusions to confirm
- Modules, inverter, mounting and agreed electrical protection.
- Installation, testing and the defined commissioning scope.
- Applicable documentation assistance and connection responsibilities.
- Any separately priced roof, civil or electrical upgrade work, batteries or additional integration.
- Payment milestones, warranty responsibilities and maintenance terms.
Savings depend on generation, the amount consumed on site, electricity rates and treatment of exports. Fixed or demand charges may remain. Payback estimates should include operating costs and state the assumptions rather than promise a standard return.
What Heliostrom Customers Say
Customer feedback can help you understand the advice, installation coordination and support involved in working with Heliostrom.
Dr. Palanivasan
Vadapalani, Chennai
“Young and professional team. Advised me with the correct requirements and completed on time.”
Priya Chandrasekaran
T. Nagar, Chennai
“Got three quotes from different installers. Heliostrom was the only one who visited the site twice before finalising the design. That thoroughness made us choose them.”
Anand Krishnan
Madurai
“Hybrid system with battery backup for our medical equipment at home. Heliostrom designed a custom solution, not a template. Running perfectly through every grid outage.”
Meena Subramanian
Tambaram, Chennai
“Heliostrom was the only company that gave us an honest assessment of realistic savings — no overselling. Bills reduced every single month.”
Suresh Rajan
Anna Nagar, Chennai
“After comparing four solar companies in Chennai, we chose Heliostrom for our office. The entire process from site visit to TANGEDCO net metering was managed by their team.”
Rajesh Kumar
Coimbatore
“Was worried about after-sales support from a Chennai-based company. But the team was responsive every time.”
Lakshmi Venkataraman
Velachery, Chennai
“The government subsidy process was completely handled by Heliostrom. Very professional team.”
Nithya Krishnan
Mylapore, Chennai
“From the first WhatsApp message to the final handover, every step was smooth. The generation monitoring app they set up lets me track savings live.”
Dr. Palanivasan
Vadapalani, Chennai
“Young and professional team. Advised me with the correct requirements and completed on time.”
Suresh Rajan
Anna Nagar, Chennai
“After comparing four solar companies in Chennai, we chose Heliostrom for our office. The entire process from site visit to TANGEDCO net metering was managed by their team.”
Priya Chandrasekaran
T. Nagar, Chennai
“Got three quotes from different installers. Heliostrom was the only one who visited the site twice before finalising the design. That thoroughness made us choose them.”
Rajesh Kumar
Coimbatore
“Was worried about after-sales support from a Chennai-based company. But the team was responsive every time.”
Anand Krishnan
Madurai
“Hybrid system with battery backup for our medical equipment at home. Heliostrom designed a custom solution, not a template. Running perfectly through every grid outage.”
Lakshmi Venkataraman
Velachery, Chennai
“The government subsidy process was completely handled by Heliostrom. Very professional team.”
Meena Subramanian
Tambaram, Chennai
“Heliostrom was the only company that gave us an honest assessment of realistic savings — no overselling. Bills reduced every single month.”
Nithya Krishnan
Mylapore, Chennai
“From the first WhatsApp message to the final handover, every step was smooth. The generation monitoring app they set up lets me track savings live.”
Process and support
Installation Handover and Ongoing Support
Understand the delivery stages and the responsibilities at each step before work begins. The project schedule depends on site readiness, equipment availability and applicable approval or connection requirements.
Step 1: Site assessment:
Review consumption, installation area, access and electrical conditions.
Step 2: Design and proposal:
Agree capacity, equipment, scope, exclusions and project milestones.
Step 3: Installation:
Coordinate mounting and electrical work with the site owner and agreed safety arrangements.
Step 4: Testing and commissioning:
Complete the defined checks, documentation and applicable connection steps.
Step 5: Handover and support:
Review operating guidance, monitoring access where included, warranty documents and service contacts.
Manufacturer product cover, performance warranties and installation workmanship terms differ. Confirm the responsible party and exclusions for each. Where maintenance is offered, agree cleaning access, inspection scope, reporting and charges in writing.
For project coordination, contact Heliostrom. Existing customers can use the customer support page.
Discuss Your 20 kW Solar Requirement
Not automatically. The quotation must specify whether storage is included and identify its capacity, supported loads and terms.
A standard on-grid system normally shuts down during an outage. Discuss an appropriate backup configuration if uninterrupted supply to selected loads is required.
Modules, inverter configuration, mounting, wiring, protection, access and any additional site work affect the final quotation.
No. Eligibility depends on the current scheme and customer category. Do not assume residential support applies to commercial installations.
Ask Heliostrom for the available references, actual installation scope and after-sales arrangements relevant to your requirement. Project capacities and customer locations should be stated accurately.
Request your proposal
Share your contact details and property location to discuss a 20 kW solar installation in Chennai or elsewhere in Tamil Nadu.