MultiPlus - Enhancing an AC Generator System

   

MultiPlus - Enhancing an AC Generator System

   

The MultiPlus PowerControl and PowerAssist functions allow reduced running time, Fuel consumption, increase generator life and comfort onboard.



Traditionally, an AC generator is installed and started whenever power is required, however to ensure the            optimal running, the generator should not operate with insufficient load or for prolonged periods with            excessive (peak) loads. The cost per Watt is higher when AC power is supplied indirectly using an inverter /            battery combination rather than directly from the generator. However, significant savings can still be made            using indirect power, especially when there are varying periods with lower consumption. 

When combining the MultiPlus with a Panda AC generator, low AC demands can be covered by the batteries using the inverter within the MultiPlus. This can dramatically decrease the generator running time    during typical usage. The MultiPlus can combine power from the generator and battery bank to cover peak periods which may allow a smaller generator to be installed.



   

Example 1: 7.5 kW AC Generator running whenever AC is required

               

The typical AC requirements during a 24 hour period are shown in the example below. There is an AC            demand throughout the day for 17 hours with three peak periods. The morning and lunch peaks reach            3kW and the evening peak reaches 6kW. To cover the evening peak of 6kW without overloading the generator, a 7.5kW generator would be required. The generator would be required to run for a total of 17 hours each day and 70% of the running time would require less than 15% of its full capacity.


       



   

Example 2: 7.5 kW AC Generator with MultiPlus (with PowerControl)

               

The running time can be reduced by using a generator and MultiPlus together. Low AC demands and the lunchtime peak can be covered by the battery bank. The generator is not required to run during these times. The generator only runs to cover the main peaks in the morning and evening which reduces the running time to 5 hours. During this time the remaining AC that is produced by the generator is converted by the MultiPlus and used for battery charging (see where the inverter line dips below zero).

PowerControl reduces the current for battery charging at 17:30hrs for a short period during a peak demand period to prevent generator overload. The charge current begins to at 20:00hrs as the battery bank is almost fully charged.

   



   

Example 3: 5kW generator with MultiPlus (with PowerControl and PowerAssist)

               

When using the MultiPlus‘s PowerAssist, a smaller generator can cope with same demand as in examples            1 and 2. The bi-directional inverter within the MultiPlus is able to add AC from the batteries to the output            of the generator for a short period of time. A MultiPlus 24/3000/70 can add an additional 3kW to the generator            output. PowerAssist stops charging at 17:30hrs where the blue line rises above 0 and draws current            from the batteries to add to the output of the generator, allowing a smaller 5kW generator to be used.

   




Summary & Benefits when using an AC generator with a MultiPlus

Generator running times can be significantly reduced if varying AC is required throughout the day and if periods of lower demand can be covered using an inverter and batteries.

  • LESS NOISE
    •            
  • AC available throughout the day
    •            
  • Fuel and oil savings
    •            
  • Reduced maintenance


    • The MultiPlus PowerControl function can prevent overload of the AC source (either generator or shore power) by restricting the current drawn for charging and using excess AC for charging batteries.

      
  • Prevents shore power tripping
    •            
  • Prevents generator overload
    •            
  • Use excess AC for charging batteries



    •   The MultiPlus PowerAssist function can help cover peak demands by increasing total power and adding AC from                batteries to the generator output.

  • Combines battery and generator output.
    •            
  • Smaller generator could be used



    •   MultiPlus units can be connected in parallel to increase output or battery charging current.
               
  • Scalable for optimal performance
    •            
  • Up to 15 kW single-phase
    •            
  • Up to 45 kW three-phase

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    Related Products of Interest:

    MultiPlus Inverter/Charger
    MultiPlus Inverter/Charger

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