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Diesel Capacitor UPS System



Battery-Free energy storage

Redundant generator set starting power


-20ºC to 40ºC operating range without derating

Remote monitoring

Simple installation

Low maintenance

High overload capability

No heat generation in equipment room reduce HVAC cost and energy cost during the life of the installation.

System operation

The main part of the diesel Capacitor UPS systems is the Super Capacitor module, the entire installation consist of:

The diesel engine,

Special type altenator

Super Capacitor storage unit

The super Capacitor storage unit supplies the bridging energy to supply the load during small power interruptions and startup of the diesel engine.

The diesel engine and the altenator are directly are directly coupled , this combination and the starting time ensures a reliable power supply to the load.

The Super Capacitor storage unit provides clean regulated power from the public mains during normal operation and from the generator during mains supply failure or if the mains is out of tolerance . This unit acts as a stabilizing filter to prevent power disturbances from reaching the UPS load.

At the moment the mains supply fails or is out of tolerance the input contactor disconnects the mains supply to the installation. The engine starts up and supply the power to the installation. The Super Capacitor unit supplies the bridging power to the critical load.

When the mains supply returns within the tolerance, the generator contactor opens and the main contractor closes without the power supply to the UPS load. The diesel engine idles during a few minutes to cool down before it is shut down.


Input Power
* Input voltage range: 47 to 56Vdc
* Recharge time: 1.6 minutes with 54V, 20 input
4 minutes for the first time charge up, 20A input source
* Maximum Safe Input: 0 to 60Vdc
* Maximum CMV: 150Vdc or peak AC applied to either output
Output Power
* Maximum output current: 150 Amperes (50 A per module) 
* Energy Storage:  The float voltage of the DC bus sets the total storage energy.
The following is a list of typical stored energy levels for various bus voltages:

56V=1800 watt minutes
54V=1600 watt minutes
52V=1500 watt minutes
50V=1380 watt minutes
48V=1250 watt minutes

* Storage Device:  22ea – 1800Farad capacitors 
* Output Connection: Two terminal Anderson PP75 connecter
Output Voltage
* Charged output voltage: 0.5 volt below the applied DC bus voltage
* Discharge cutoff voltage: 40.Vdc±0.80Vdc
* Output noise: Voice Band 26dBrnc
200mV peak 19mV 10kHz to 20Mhz
* Short circuit protection Reset-able circuit breaker


Super Capacitor Energy Storages System

Energy Storage System PC 48-1.6Wk energy storage system is a high reliability short duration energy storage system used to provide 48V DC bridge power. It provides primary 48V DC power during the start-up or transfer to generators.

The PC48-1.6kWm unit is a self-contained systems that includes ultra capacitors, DC-to-DC boost converter, DC charging circuit , cell balancing and status indicators.

When the primary source fails, the PC-48 unit will begin to deliver power to the load. The discharge of the PM 48 unit will begin just below the normal operation voltage of the primary source and will continue to a low voltage shut-off a 40V DC. Optimum bridge time for the unit is between seconds to minutes, depending on the load. The unit's standby capability is rated in watt minutes, defined as the amount of power (watt) that can be supplied for one minute. The unit can deliver up to 150A (50 A per module).

This system incorporates long life, high reliability ultra capacitors that require no periodic maintenance and have an expected life of 10 years. The system incorporate a DC-to-DC boost that will reduce the slope of the ultra capacitors discharge to mimic a typical lead aid battery slope, providing effective use of ultra capacitors by deeply discharging them while buffering the installed system from the wide voltage swing. The lead battery slope can be useful in those systems which currently use lead acid batteries, and which sence the battery voltage for system diagnostics.

The system incorporate a charging circuit that can rapidly recharge using excess energy from the ds bus to charge up the bank of integrated energy storage ultra capacitors. The charger will limit the current draw to 20A and will shut-off at a lower threshold of 47Vdc to ensure that the unit does not draw excess current while the primary dc source is supporting main load current. Depending on the available current, the unit can initially charge from full discharge to full charge in less that 15 minutes. Typical recharge time after a discharge is dependent on available current and discharge, but can be from 1 or 2 minutes up to 10 minutes to full recharge. The system can support hundreds of thousands of cycles, regardless of the depth of discharge, The corrosion and include cell balancing circuitry, increasing reliability and decreasing maintenance.

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