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SunWell Energy

22kW 40kWh Medium Commercial Solar System

22kW 40kWh Medium Commercial Solar System

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The 40.96kWh Medium Commercial Parallel Solar System pairs two 11 kW hybrid inverters (22 kW single-phase, parallel) with a 40.96 kWh shared LiFePO4 bank and a 14.88 kWp array. Generating about 74.4 kWh per day, it serves medium commercial sites - shops, clinics, restaurants - that need higher backup power from a single-phase supply.

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Key Specifications

ParameterValue
System type Commercial hybrid, single-phase 230 V (parallel)
PV array 14.88 kWp (24 x 620 W)
Inverter 11kW inverter x 2
Battery 40.96 kWh LiFePO4 battery
Daily output 74.4 kWh/day (5 peak sun hours)
Annual output 27,156 kWh/year
Best for Commercial premises requiring higher backup capacity from a single-phase supply

Main Advantages

  • Two 11 kW units in parallel deliver 22 kW, expandable to 6 units as the business grows.
  • 40.96 kWh shared bank covers typical commercial loads for about 13.5 hours.
  • One battery BMS link keeps communication simple across the parallel pair.
  • Pure sine-wave output runs fridges, AC, ovens and POS together without flicker.
  • Factory parallel kit makes the dual-inverter setup straightforward to install.

Applications

  • Large supermarkets and restaurants (40-80 seats)
  • Clinics, gyms and hotel lobbies
  • Commercial sites needing 22 kW of backed-up single-phase power
  • Businesses in weak-grid areas wanting long autonomy

System Configuration

CategoryProduct modelQtySubtotal
Solar panel 620 W monocrystalline 24 pcs 14.88 kWp
Hybrid inverter M11000T-48PL 2 pcs 22.0 kW, 48 V (parallel)
Lithium battery S-51.2/400-A 2 pcs 40.96 kWh (shared bank)

SystemTopology

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Load Capacity

LoadPowerDaily running timekWh/day
Commercial fridge (200 W x 8) 1,600 W 24 h x 0.5 duty 19.20 kWh
Chest freezer (350 W x 2) 700 W 24 h x 0.5 duty 8.40 kWh
2 HP AC (1,800 W x 2) 3,600 W 8 h 28.80 kWh
LED commercial lighting (25 W x 20) 500 W 12 h 6.00 kWh
Bakery oven (3,000 W) 3,000 W 3 h 9.00 kWh
POS / network / monitoring 50 W 12 h 0.60 kWh
Total 72.0 kWh/day — fully covered by daily solar generation

Annual Savings and Payback

MetricValue
Annual generation 27,156 kWh/year
Tariff applied USD 0.25/kWh (representative off-grid tariff, illustrative)
Annual electricity bill offset USD 6,789 per year

Maximumsystem investment for each payback target

Target paybackMaximum system investment
2 years USD 13,578
3 years USD 20,367
4 years USD 27,156
6 years USD 40,734
8 years USD 54,312

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 40.96kWh parallel system produce perday?

About 74.4 kWh per day (14.88 kWp x 5 peak sun hours).

Why are two inverters used instead of one?

Two 11 kW units run in parallel to deliver 22 kW single-phase output; this also lets the system scale up to 6 units for future growth.

How long is the backup time?

36.86 kWh usable supports typical commercial loads for about 12.3 hours.

How many inverter units can be paralleled later?

The platform supports up to 6 units in parallel, raising both power and redundancy as your site grows.

Can the battery bank be expanded?

Yes. Add more S-51.2/400-A modules to the shared bank for longer autonomy.