Dyness BF100 100kWh C&I Cabinet

Dyness BF100 – 100 kWh C&I Energy Storage System

Dyness BF100 – 100 kWh C&I Energy Storage System

The BF100 is a DC battery cabinet designed for outdoor installation and developed for small-scale industrial and commercial (C&I) energy storage systems. It is important to note that this is not an inverter, but rather the battery unit of the storage system. For AC-side operation, a matched, wall-mounted hybrid inverter (PCS) is required to manage the PV system, the grid, and the load side. The cabinet comes equipped with LFP cells, a built-in air conditioning system, and a fire protection system, allowing it to operate independently even in open-air environments.

What is it used for?

The BF100 is typically used at small industrial and commercial sites—such as workshops, farms, small factories, warehouses, or retail units—to meet their energy storage needs. Typical applications include peak shaving, storing and later using on-site PV generation, and providing backup power. The 86–100 kWh capacity is sized for a single site’s daily load and can be expanded on the DC side if demand increases later. Since it has an IP55 rating and is climate-controlled, it does not require a separate equipment room and can be installed on an outdoor concrete foundation.

How does it work?

Inside the cabinet are LiFePO4 cells and a battery management unit (BDU), which is connected to the DC bus. From there, a compatible hybrid inverter takes over, handling the PV input (MPPT), grid and load-side switching, and, if required, the generator as well. The built-in air conditioner (2 kW cooling, 1 kW heating) keeps the cells within the optimal temperature range of –20 to +50 °C, which directly extends their service life. Monitoring is performed via a touchscreen and over Ethernet, 4G, or RS485, allowing for remote monitoring.

Technical and System-Level Benefits

LFP chemistry provides a 95% depth of discharge (DOD) and a warranty of at least 8,000 cycles over 10 years, ensuring a predictable long-term return on investment. The system is compatible with Solis, SOSEN, SOLINTEG, and Megarevo hybrid inverters, allowing it to integrate seamlessly with existing supplier relationships. Thanks to its modular design and DC-side scalability, capacity can be adjusted as the site grows. The safety package features three-level fire detection, aerosol fire suppression, and explosion-proof ventilation—which is particularly important for unattended outdoor sites. IP55 rating, C3 (optionally C4) corrosion protection, and the ability to be installed at altitudes up to 3,000 m make it suitable for use even in harsh environments.

Differences

Two versions are available, both with the same dimensions (725 / 1200 / 2260 mm), the same cell chemistry, and the same safety features. The BF100-C80 offers a rated capacity of 86 kWh with 6 modules and weighs approximately 1100 kg. The BF100-C100 offers 100 kWh with 7 modules and weighs approximately 1200 kg. In practice, the C80 is the more economical entry-level option, while the C100 makes sense if you plan to utilize the full capacity or need a longer range—since the space requirements and installation process remain the same, the extra cost is often well worth it.

Important to Know

The BF100 is not a complete system on its own: a hybrid inverter compatible with AC output must be designed to work with it, and the sizing must be adjusted accordingly. Power derating takes effect above 45 °C and at altitudes above 2,000 m; this must be factored in for hot or high-altitude sites. The cabinet weighs 1.1–1.2 metric tons, so a foundation with sufficient load-bearing capacity and crane access are required during installation. Due to its size, it is intended for smaller C&I-scale projects, not large, MW-scale projects.

SOLARKIT Reviews

We recommend the BF100 to those looking for an outdoor, quick-to-install DC storage unit for smaller commercial and industrial sites to pair with a proven hybrid inverter. Thanks to its climate control and comprehensive fire safety package, it’s a good choice for unattended, outdoor locations where safety and stable cell temperature are key considerations. As an installer, this is a good fit if you’re considering a capacity range of 86–100 kWh and clarify the inverter pairing, as well as the foundation and access requirements, up front. The long cycle life and 10-year warranty are the strongest arguments in the ROI calculation.