For many commercial and industrial energy storage customers, the difference between a BESS and a high-voltage battery cabinet isn’t entirely clear. Both systems suit high-voltage three-phase power environments.
So when do you actually need a BESS, and when is a high-voltage battery cabinet the right choice?
Here’s a straightforward way to think about it: a BESS is essentially an upgraded version of the high-voltage battery cabinet.
What is BESS ?
As many in the industry know, a BESS is a fully integrated system. It packs in a range of functions—like MPPT, EMS, PCS, and STS—all in one unit. You can directly connect it to photovoltaic systems using straightforward DC coupling, and it comes with built-in bidirectional AC/DC conversion.
What really makes it work is the STS. This feature lets the system switch energy sources without a hitch, even while it’s connected to the main grid, so the load never loses power. That’s a game-changer for factories running high-precision instruments or any operation where downtime is expensive. It significantly smooths out the user experience. To top it off, LVFU’s BESS incorporates what’s recognized nationally as leading “frequency regulation” tech. This allows you to run multiple generators in parallel while syncing them to the same output frequency, which neatly solves the traditional headaches around paralleling generators.
What is high-voltage battery cabinet ?
The high-voltage battery cabinet is a simple combination of high-voltage batteries and high-voltage combiner boxes. It requires the use of a grid-connected inverter. Its advantages are that it is very flexible and easy to install. It can be installed in any location and under any conditions and is not prone to major problems. It can easily solve customers’ small-capacity customization needs.
So how do you choose between these two products?
If the customer’s demand is greater than 200kWh, we generally recommend the BESS system because it has a lower unit cost, more comprehensive functions, improves the customer’s user experience, and the advanced EMS management system can effectively balance the operation of each power source.
If the customer’s demand is less than 200kWh, we recommend the high-voltage battery cabinet because it has a lower overall cost, is more flexible, has a shorter installation cycle, is very convenient to maintain, and is also very easy to expand or relocate later.
In summary, BESS and high-voltage energy storage cabinets each have their advantages and disadvantages. When making a selection, it is best to provide us with more information about your power usage so that we can create a more suitable overall design solution for you.
