Emerald Solar · ANERT Service Provider
Emerald Enterprises designs and installs rooftop solar power plants for homes, apartments, farms and businesses across Kerala and South India. A 3 kW on-grid plant costs about ₹1,22,000 after the ₹78,000 PM Surya Ghar subsidy, generates around 351 units a month and pays for itself in roughly four years.
Solar Solutions
On-grid for the lowest cost, off-grid for full independence, hybrid for savings plus backup. Every system is designed after a free site survey.
An on-grid (grid-tied) solar power plant connects to the KSEB grid through a bi-directional net meter. Your home uses solar power first, any surplus is exported to the grid for credits, and at night you draw from the grid. You pay only for the difference between import and export.
How it works & prices
An off-grid solar power plant is a self-contained system: solar panels charge a battery bank through a solar PCU (MPPT charge controller plus inverter), and the batteries power your loads day and night with no connection to the grid.
How it works & prices
A hybrid solar power plant combines the savings of on-grid solar with the security of a battery. A hybrid inverter manages panels, battery and the KSEB grid: it powers your home from solar, stores the daytime surplus for the evening, exports anything extra through the net meter, and switches to battery automatically when the grid fails.
How it works & pricesResidential Rooftop · On-Grid Home Packages
Complete, ready-to-install systems: modules, inverter, mounting structure, earthing, lightning arrester, ACDB/DCDB, cabling, net-meter liaison and commissioning. Pick a size to see its full cost, subsidy and savings calculation.
| System | Panels | Roof area | Units / month | Bill value / month | Central subsidy | After subsidy | Payback |
|---|---|---|---|---|---|---|---|
| 1 kW | 2 | ~100 sq ft | 117 | ₹819 | ₹30,000 | On survey | — |
| 2 kW | 4 | ~200 sq ft | 234 | ₹1,638 | ₹60,000 | On survey | — |
| 3 kW | 6 | ~300 sq ft | 351 | ₹2,457 | ₹78,000 | ₹1,22,000 | 4.1 yrs |
| 5 kW | 9–10 | ~500 sq ft | 585 | ₹4,095 | ₹78,000 | ₹2,37,000 | 4.8 yrs |
| 7 kW | 13–14 | ~700 sq ft | 819 | ₹5,733 | ₹78,000 | ₹3,62,000 | 5.3 yrs |
| 10 kW | 18–20 | ~1,000 sq ft | 1,170 | ₹8,190 | ₹78,000 | On survey | — |
Generation at 3.9 units per kW per day (Kerala average) and ₹7 a unit; it varies with location, shading and season. Subsidy under the PM Surya Ghar: Muft Bijli Yojana for residential on-grid systems, as per prevailing government norms. Prices are indicative and confirmed after a free site survey.
Solar + Your Lifestyle
A 3 kW plant generates about 351 units a month. Here is what that energy means for an electric car, an electric scooter, an air conditioner and your kitchen, worked out at ₹7 a unit.
Solar + Electric Car · Example: Tata Punch EV
Sunshine is the fuel. At 6 km per unit, 3 kW of solar is enough for about 2,106 km of driving a month if all of it went to the car. A typical owner driving 1,500 km a month uses about 250 units, 71% of this plant’s output.
| Solar system | 3 kW | 5 kW | 7 kW |
|---|---|---|---|
| Monthly generation | 351 units | 585 units | 819 units |
| EV driving per month* | 2,106 km | 3,510 km | 4,914 km |
| Full charges / month (30 · 40 kWh) | 10.6 · 8.0 | 17.7 · 13.3 | 24.8 · 18.6 |
| Investment after subsidy | ₹1,22,000 | ₹2,37,000 | ₹3,62,000 |
| Annual electricity value | ₹29,484 | ₹49,140 | ₹68,796 |
| Payback period | 4.1 years | 4.8 years | 5.3 years |
| Annual return | 24.2% | 20.7% | 19.0% |
5 kW is the ideal start for a home with one EV: solar power for the house and the car. With a hybrid system you can also charge at night from the battery.
* Theoretical figure if all solar power goes to the EV. Assumes 3.9 units/kW/day (Kerala average), ₹7/unit, 6 km per metered unit, 10% charging loss, petrol ₹107/litre at 15 km/l. An on-grid system cannot charge the car directly at night; net-metering rules apply. Confirm variant, range and price with the vehicle maker. Not a guaranteed return.
Solar + Electric Scooter · Example: Ather 450 series
Riding 1,000 km a month costs just ₹163–₹183 even at grid tariff. A 3 kW plant could fully charge a 2.9 kWh scooter about 110 times a month, so one scooter uses only 7% of its output.
| Model / battery | IDC range | Full charge | 1,000 km / month | Charges / month from 3 kW* |
|---|---|---|---|---|
| Ather 450S · 2.9 kWh | 122 km | ₹22 | ₹183 | 110 |
| Ather 450S · 3.5 kWh | 161 km | ₹27 | ₹167 | 91 |
| Ather 450X · 2.9 kWh | 126 km | ₹22 | ₹177 | 110 |
| Ather 450X · 3.5 kWh | 161 km | ₹27 | ₹167 | 91 |
| Ather 450 Apex · 3.5 kWh | 165 km | ₹27 | ₹163 | 91 |
3 kW of solar is more than enough for one scooter; the rest powers your home and cuts your bill.
* Theoretical figure if all solar power goes to the scooter; excludes household use. Based on the maker’s published IDC range, 10% charging loss, ₹7/unit, petrol scooter at 45 km/l. Real-world range will be lower than IDC. Confirm variant, price and availability with the dealer.
Solar + Air Conditioner · 1.5 & 2 ton inverter AC
The sun heats, solar cools. Running a 1.5 ton 3-star AC for 8 hours a day costs about ₹941 a month, and needs only 38% of a 3 kW plant’s output.
| AC (8 hours/day) | Units / month | Cost / month | Cost / year | Share of 3 kW |
|---|---|---|---|---|
| 1.5 ton · 3-star | 134 | ₹941 | ₹11,290 | 38% |
| 1.5 ton · 5-star | 106 | ₹739 | ₹8,870 | 30% |
| 2 ton · 3-star | 192 | ₹1,344 | ₹16,128 | 55% |
| 2 ton · 5-star | 156 | ₹1,092 | ₹13,104 | 44% |
Solar powers the AC directly while it runs in the daytime. A BEE 5-star inverter AC plus solar doubles the savings; set it to 24–26°C to save even more.
* 8 hours/day, 30 days/month; illustrative average input: 1.5 ton 3-star 0.56 kW, 5-star 0.44 kW; 2 ton 3-star 0.80 kW, 5-star 0.65 kW. Actual use varies with model, room size and temperature setting; check the annual kWh on the BEE label.
Solar + Induction Cooking · 14.2 kg LPG at ₹949
One 14.2 kg cylinder equals roughly 138 units of induction cooking. Moving all your cooking to induction needs about 93 units a month, only 27% of a 3 kW plant, and avoids about ₹7,697 of LPG a year.
| Cooking moved to induction | LPG cylinders / year | LPG cost / year | Induction units / month |
|---|---|---|---|
| 0% (LPG only) | 8.1 | ₹7,697 | 0 |
| 25% | 6.1 | ₹5,773 | 23 |
| 50% | 4.1 | ₹3,849 | 47 |
| 75% | 2.0 | ₹1,924 | 70 |
| 100% (all induction) | 0.0 | ₹0 | 93 |
No flame, no gas-leak worry and a cooler kitchen. Keep LPG as backup and every cylinder lasts longer.
One 14.2 kg cylinder every 45 days (₹949, Kottayam, 31.10.2026); 1 cylinder ≈ 138 induction units. On grid power induction costs about the same as LPG; savings come from cooking on daytime solar. Evening cooking on solar needs a hybrid system.
Charge your electric car or scooter from rooftop solar in Kerala. 5 kW powers up to 3,510 km of EV driving a month. Tata Punch EV and Ather 450 cost-per-km calculations.
See the calculation
Commercial rooftop and carport solar from 10 kW to industrial scale in Kerala. A 50 kW plant pays back in about 4 years with 40% accelerated depreciation. See the 5-year ROI table.
See the calculation
For Your Home
Say goodbye to rising electricity bills. Emerald makes going solar simple, from the first site visit to the subsidy in your bank account.
Solar Savings Calculator
Tick what you run at home, pick a plant size, and see generation, savings, payback and whether the plant covers your loads. Figures use Kerala averages (3.9 units/kW/day, ₹7/unit).
worth ₹0 a month at ₹7/unit
Indicative estimates only. Prices are Emerald’s catalogue figures after subsidy for residential on-grid plants; 1, 2 and 10 kW plants are priced after a free site survey. Actual generation varies with location, shading and season; bill savings depend on KSEB tariff slabs and net-metering rules.
Solar PV Modules
Tier-1 monocrystalline half-cut modules that produce more energy from every square foot of roof, in Kerala’s heat and humidity, for 25+ years. Mono PERC (540–555 Wp) for homes, TOPCon bifacial (575–590 Wp) for maximum commercial yield.
| Cell technology | Monocrystalline, 144 half-cut cells |
|---|---|
| Module options | Mono PERC 540–555 Wp · TOPCon bifacial 575–590 Wp |
| Module efficiency | 21% – 22.8% |
| Dimensions | 2278 × 1134 × 30–35 mm (approx.) |
| Frame & glass | Anodised aluminium, 3.2 mm tempered AR glass |
| Junction box | IP68, 3 bypass diodes, MC4-compatible |
| Certifications | BIS / IEC 61215, IEC 61730, ALMM listed |
| Warranty | 12-year product · 25–30-year linear performance |
How We Work
Complete, ready-to-install systems. We handle the engineering, the KSEB paperwork and the subsidy, so going solar is simple.
Emerald Care
Solar Power Plant FAQs
Call or WhatsApp +91 87147 04086 for a free site visit and estimate. Our team replies within 24 hours, Monday to Saturday, 9 AM to 6 PM.