Driven by the "Source-Grid-Load-Storage" integrated energy management concept, the energy storage market is booming. As the core of storage systems, the inverter performs bidirectional DC/AC conversion—absorbing power at the source, correcting power factor at the grid, and smoothing fluctuations at the load. With rising system power levels, high-power components are in growing demand.

Two key challenges for storage inverter power circuits:

1. Increasing power density – Inverters must handle tens of kW to MW within limited space. Resistors endure sustained power and transient overloads, with dozens of devices heating simultaneously in enclosed cabinets—thermal margin and dissipation are critical.

2. Extreme continuous operation – 7×24 runtime with limited maintenance windows demands exceptional long-term stability and load life.

Resistor selection for high-power scenarios

FOSAN FRP Series – high-power thick-film chip resistors tailored for gate drive, snubber, and voltage divider circuits in storage inverters.

Key advantages:：

• High power rating – From 1/10W to 2W (2512 size up to 2W, zero-ohm up to 12A). Ample margin reduces aging risks from thermal stress in dense layouts.

• Wide resistance range – 1Ω to 10MΩ, with tolerances ±1%, 1%, 2%, 5%, flexible for various inverter topologies.

• Broad temperature stability – –55°C to +155°C, stable drift under full load, ensuring reliable performance over the inverter's lifecycle.

Reliable long-term protection – High power capability, wide-temperature stability, and proven durability lower maintenance costs. Standard SMT packaging enables streamlined design and faster production.

Recommended series: FRP, FPS (anti-surge high-power), FRS (anti-surge), FCP (ultra-high-power).

FOSAN Technology