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SunWell Energy

12 kW 32kWh Villa Solar System

12 kW 32kWh Villa Solar System

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The 32.15kWh Villa Solar System with Extended Autonomy uses the same 12 kW inverter and 12.4 kWp array as the Large Villa system but adds a 32.15 kWh LiFePO4 battery for about 57% more storage. It targets villas in high-rainfall or weak-grid areas, or homes with long evening peaks and high overnight draw.

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Key Specifications

ParameterValue
System type Residential hybrid, single-phase 230 V
PV array 12.4 kWp (20 x 620 W)
Inverter 12kW inverter x 1
Battery 32.15 kWh LiFePO4 battery
Daily output 62.0 kWh/day (5 peak sun hours)
Annual output 22,630 kWh/year
Best for Larger homes that need extended backup time ordraw more power overnight

Main Advantages

  • 32.15 kWh bank delivers about 13.6 hours of villa backup and rides through cloudy days.
  • Same 12 kW inverter and dual-MPPT array as the 20.48 kWh villa, so upgrade is battery-only.
  • Single-unit design keeps install and maintenance simple.
  • Pure sine-wave output protects whole-home electronics through long outages.
  • Best fit for weak-grid or high-rainfall sites with extended evening peaks.

Applications

  • Large villas in high-rainfall or weak-grid areas
  • Sites with long evening peak demand
  • Customers wanting maximum overnight autonomy at 12 kW
  • Family compounds with high overnight consumption

System Configuration

CategoryProduct modelQtySubtotal
Solar panel 620 W monocrystalline 20 pcs 12.40 kWp
Hybrid inverter SW-12.0KW/48V 1 pc 12.0 kW, 48 V
Lithium battery S-51.2/628-A 1 pc 32.15 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; larger battery extendsautonomy by ~57%

Annual Savings and Payback

MetricValue
Annual generation 22,630 kWh/year
Tariff applied USD 0.25/kWh (representative off-grid tariff)
Annual electricity bill offset USD 5,658 per year

Maximum system investment for each payback target

Target paybackMaximum system investment
2 years USD 11,315
3 years USD 16,972
4 years USD 22,630
6 years USD 33,945
8 years USD 45,260

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 and Maintenance

Install panels
on a roof or ground frame with the correct tilt and orientation. Mount
inverters on a non-combustible wall with clearance for airflow. For parallel
systems, all units must share one battery bank and all battery cables must be
identical in length. Place batteries in a dry, ventilated room. Connect battery
first, then PV, then AC, then commission each unit in turn.

  • Keep panels clean, especially in dusty or dry-season 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 32.15kWh home system produce per day?

About 62 kWh per day (12.4 kWp x 5 peak sun hours).

How is it different from the 20.48kWh home system?

Same inverter and array; the battery is 32.15 kWh instead of 20.48 kWh, giving ~57% more storage and longer autonomy.

How long is the backup time?

28.94 kWh usable supports typical villa loads for about 13.6 hours.

What if I need more than half a day of backup power?

With 28.94 kWh usable this system covers overnight and next-morning loads for larger villas, so essential circuits ride through long outages.

Can it be expanded?

Yes, upgrade to M11000T parallel for 22 kW+ if needed.