Residential Energy Storage System
Commercial & Industrial BESS
Residential inverter
Let the sun power your home
Be energy independent
Combining solar, storage and EV charging, offers an all-in-one Home Energy Solution that helps you lower utility bill and reliance on the grid.
Simple to install, easy to use, smart & safe all around, our system is versatile and scalable to meet every need.
Illuminate Your Home with Solar Power
Embrace Energy Autonomy
At night
Enjoy Energy
S40K
Rack Mounting Residential Energy Storage.
Redefining energy storage, charging, and utilization.
S40K Single Battery
Nominal Energy：5.12kWh
Nominal Voltage：51.2 V
Enclosure：IP65
Cycle Life：8000 times
Communication Method：CAN、RS485、WiFi
Multiple Stacks, Flexible Deployment
Each battery supports 2-8 modules stacked.
Individual battery capacity: 10.24 kWh - 40.96 kWh.
Supports up to 15 parallel units.
Let the sun power your homeBe energy independent
Combining solar, storage and EV charging, offers an all-in-one Home Energy Solution that helps you lower utility bill and reliance on the grid.
Simple to install, easy to use, smart & safe all around, our system is versatile and scalable to meet every need.
Self-Consumption
Charge, store, and power your home system seamlessly
Peak Shaving
Harness fluctuating rates to reduce your electric bill
Energy Surplus
Sell your excess power back to the grid and earn
Energy Outage
Stay self-reliant during peak times or grid downtimes
At nightEnjoy Energy
Self-Consumption
Charge, store, and power your home system seamlessly
Peak Shaving
Harness fluctuating rates to reduce your electric bill
Energy Surplus
Sell your excess power back to the grid and earn
Energy Outage
Stay self-reliant during peak times or grid downtimes
S40K
Rack Mounting Residential Energy Storage.
Redefining energy storage, charging, and utilization.
S40K Single Battery
Nominal Energy：5.12kWh
Nominal Voltage：51.2 V
Enclosure：IP65
Cycle Life：8000 times
Communication Method：CAN、RS485、WiFi
Learn moreMultiple Stacks, Flexible Deployment
Each battery supports 2-8 modules stacked.
Individual battery capacity: 10.24 kWh - 40.96 kWh.
Supports up to 15 parallel units.
Learn moreKowint Network
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Learn MoreRecent News
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Oct 21, 2025 US In-Stock: 10% Off S40K R5000. Lock In Price Before Tariffs.
We are excited to announce a major U.S. in-stock sale on our flagship residential energy storage systems (ESS). This special promotion is our commitment to providing our channel partners and installer···
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Sep 28, 2025 KOWINT Cloud : How to Bind Your Account | Web & App Instructions
Welcome to the Kowint Cloud Platform! After your initial account registration, the immediate and most critical next step is to bind your account to a superior. This process is essential for activating···
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Sep 15, 2025 Kowint Energy Spotlights VPP and LiFePO4 Battery Innovation at RE+ 2025
A Week of Innovation in Renewable EnergyKowint Energy is thrilled to announce the successful conclusion of our participation at RE+ 2025, held in Las Vegas from September 8-11, 2025. The event provide···
