The SAJ HS3 home battery is incredibly slim, but immensely powerful

By Aaron Mamiit Published September 6, 2025

Most home energy storage systems in the market today are big and bulky, making it pretty tough to install them because they take up a lot of space. The SAJ HS3 answers the issue as the thinnest 6-in-1 home battery system, with thickness of just 17cm so it’s easy to find a spot for it in your garage, any indoor area with limited space, or an outdoor wall. It doesn’t compromise performance to achieve this ultra-compact design though — it’s a complete system that’s packed with features, which further differentiates it from the other options out there.

As a 6-in-1 home battery system, the SAJ HS3 functions as a solar inverter, electric vehicle charger, battery PCS, battery pack, backup power source, and energy management system. That’s a lot of work from a single device, and since its installation is quick and simple with its modular construction and blind plug design, it will be up and running in no time.

Mixing old and new batteries is usually impossible for energy storage systems, but the SAJ HS3 solves this with its DC-DC optimizer. Start with a 5kWh battery pack and expand to as much as 40kWh, depending on your home’s needs. The SAJ HS3 also comes with built-in diagnostic tools for feedback and troubleshooting, and the elekeeper EMS app enables optimization of energy use based on your appliances, real-time tariffs, and weather conditions, for savings up to 20% on your electricity bills.

No matter where you decide to place the SAJ HS3, you can trust its durability and reliability. It can operate at an environment as cold as negative 30 degrees Celsius, and it has a fire suppression system that activates within 3 seconds if it detects a temperature of 185 degrees Celsius.

If you’re looking for a home energy storage system that’s both sleek and powerful, you can’t go wrong with the SAJ HS3. There’s no time to waste — make the purchase to start enjoying its benefits as soon as possible.