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SunWell Energy

12 kW 20kWh Large Villa Solar System

12 kW 20kWh Large Villa Solar System

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The 20.48kWh Large Villa Solar System is designed for detached villas and family compounds with heavy cooling and whole-house demand. A 12 kW hybrid inverter, a 20.48 kWh LiFePO4 battery and a 7.44 kWp array produce about 37.2 kWh per day, running three to four air conditioners together with refrigeration, water pump, kitchen appliances and lighting.

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Key Specifications

ParameterValue
System type Residential hybrid, single-phase 230 V
PV array 7.44 kWp (12 x 620 W)
Inverter 12kW inverter x 1
Battery 20.48 kWh LiFePO4 battery
Daily output 37.2 kWh/day (5 peak sun hours)
Annual output 13,578 kWh/year
Best for Spacious villas and family compounds with several air conditioners and a full household load

Main Advantages

  • 12 kW output starts several AC units and large motors (fridge, freezer, pump) at once.
  • Dual-MPPT accepts the full 12-panel array with comfortable margin.
  • 20.48 kWh bank backs a typical villa for about 12 hours.
  • Pure sine-wave power suits sensitive AV, networking and kitchen electronics.
  • Single 12 kW unit avoids parallel complexity while covering a whole villa.

Applications

  • Large detached villas and family compounds
  • Premium residences with high cooling demand
  • Home offices with servers and networking
  • Sites wanting whole-home backup without parallel stacking

System Configuration

CategoryProduct modelQtySubtotal
Solar panel 620 W monocrystalline 12 pcs 7.44 kWp
Hybrid inverter SW-12.0KW/48V 1 pc 12.0 kW, 48 V
Lithium battery S-51.2/400-A 1 pc 20.48 kWh

SystemTopology

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Load Capacity

LoadPowerDaily running timekWh/day
Standard household base loads — — 12.92 kWh
Extra 2x 1.5 HP AC (1200 W each) 2,400 W 8 h 19.20 kWh
Extra 2x 1 HP AC (900 W each) 1,800 W 8 h 14.40 kWh
Electric water heater (2,000 W) 2,000 W 2 h 4.00 kWh
Home office (PC + monitor + printer) 150 W 8 h 1.20 kWh
Total Non-summer ~51.7 kWh/day; summer peak ~65.7kWh/day (stagger AC/oven to fit 62 kWh)

Annual Savings and Payback

MetricValue
Annual generation 13,578 kWh/year
Tariff applied USD 0.25/kWh (representative off-grid tariff, illustrative)
Annual electricity bill offset USD 3,395 per year

Maximumsystem investment for each payback target

Target paybackMaximum system investment
2 years USD 6,789
3 years USD 10,183
4 years USD 13,578
6 years USD 20,367
8 years USD 27,156

Figures assume the full annual generation is consumed or exported at the tariff shown, with no system losses applied, and exclude financing, insurance, maintenance and tariff changes over time.

Installation andMaintenance

Install panels on a roof or ground frame with the correct tilt and orientation for your latitude. Mount the inverter vertically on a non-combustible wall in a shaded, ventilated position. Place the battery indoors in a dry room. Connect the battery first, then PV, then AC input and output. Commission the inverter using the LCD settings for your battery type.

  • Keep panels clean, especially in dusty or harmattan conditions.
  • Check terminal torque periodically and keep the battery room dry and ventilated.
  • Contact us for warranty terms applicable to your market and order quantity.

We provide a 10-year product warranty on the solar panels (30-year linear power performance), a 5-year warranty on the LiFePO4 battery, and a 2-year warranty on the hybrid inverter. If you experience any quality issues within the applicable warranty period, please contact us and we will arrange a replacement or repair promptly.

Frequently Asked Questions

How much does the 20.48kWh home system produce per day?

About 37.2 kWh per day (7.44 kWp x 5 peak sun hours, no losses).

How many air conditioners can it run?

Three to four AC units plus a full domestic load; the 12 kW inverter covers large motor starting surges.

How long is the backup time?

18.43 kWh usable supports typical villa loads for about 12 hours

Can it run a full villa including kitchen and water pump?

Yes. The 12 kW output covers lighting, multiple AC units, refrigerator, deep freezer, water pump and kitchen appliances at once.

Can it be expanded later?

Yes. Upgrade path to M11000T parallel for 22 kW+ if you outgrow 12 kW.