The Samlex 100 Amps battery backup provides uninterrupted power. The modular 19"" rack mounted AC/DC provides up to 100 Amps power. The in-built battery back-up module charges the batteries too. The product has diverse applications including telecommunication systems, GPS receivers, CCTV security systems and critical power supply applications. Further convenient features include LEDs that indicate module status and fault indicators and fault alarms. The output voltage is highly regulated and the product is protected against short circuit and overload. Front panel analog Volt/Ampere Meter display and remote monitoring besides fan failure warning are other cool aspects. You wont regret the wise investment.