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SMART BATTERY CHARGER

SMPS-2420 24V 20AMP 600 WATTS 92.5 %

SMPS-2420 chargers are designed in high efficiency, half-bridge 100 kHz switchmode technology. Thanks to their smart charging algorithm, they charge batteries faster than conventional chargers. Fast charging is achieved by maintaining the highest possible charging voltage at battery terminals and resuming to the float charge voltage when the battery is fully charged. The regenerative charging algorithm extends battery life by applying periodic regenerative charging cycles. SMPS-2420 charges both lead-acid and Nickel-Cadmium batteries. It is specially designed for permanent connection to genset starter batteries and does not require disconnection during cranking. The output voltage of the charger is adjustable between 21.00 and 28.80V with external 0-10V analog signal. This feature allows application of any desired “V-I-t” charge characteristic via an external control unit. When no signal is applied, the charger provides its float charge voltage of 26.80V. Via a logic signal it can be switched to “boost charge” mode. The charger measures internally its output current and provides a 0-10V analog output. This signal may directly drive measurement units.

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Current output and control input allow an unlimited number of chargers to be put in parallel with external control circuit, without the need of diodes or power consuming components. The unit is cooled with an optional internal automatic temperature and speed controlled fan, running only when needed. The fan allows operation in higher temperatures at full load. In fan-less versions, a power de-rating is applied when the internal temperature of charger exceeds operating limits. The efficiency of the charger exceeds 92%, resulting in lower energy losses and lower long-term operation costs. As an example, compared to a charger of 80% efficiency, with 30% average load and 30 years of operational life, it will consume 6’900 kW-h less electrical energy. This corresponds approximately to 690 USD less energy expenses. The unit has overload, short circuit and high temperature protections. This feature makes the unit deliver only the rated current during short circuit or overload conditions. In case of excessive temperature, it will protect itself by reducing the current output. Chargers have open chassis, metal cased design, suitable for bolt and stud mounting in an enclosed panel. The low weight of the unit makes it ideal for use in highly vibrating environments. Small dimensions allow compact panel design. The wide input voltage range allows these chargers to be used in most countries. The rectifier fail output is provided as a standard feature. Thanks to this output, a rectifier fail signal is provided to the control module which will give an alarm in case of failure.

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