Sargent EC328 Power Control System Kit

Price:  £693.52   (£577.93 Exc. VAT)

Product code:  P03213
Brand:  Sargent



5 in stock

The Sargent EC328 kit is an all-in-one 'plug-and-play' electrical system for campervans, motorhomes, caravans and other leisure vehicles. These complete kits are very popular amongst professional and DIY converters alike for their integrated design and ease of installation. All the major components you need for your installation are supplied, including fully built wiring harnesses for the 230V AC and 12V DC parts of the system, fresh water level sensors (high/low), waste water float sensor and external temperature probe. This kit is especially suited to larger vehicles such as LWB vans and motorhomes as it features longer wiring harnesses than Sargent's EC155 kit and has more features.

EC328 Power Supply Unit

The EC328 safely manages all your 12V and 230V distribution in one compact enclosure and contains a powerful 300W, 25A variable voltage charger for re-charging wet lead-acid leisure batteries* from a mains hook-up, a split charging function for re-charging wet lead-acid leisure batteries from the vehicle alternator (Euro 4 & earlier vehicles ) and a dual output solar controller that provides simultaneous charging of the leisure and starter batteries from a solar panel of up to 120W.

The 230V distribution system comprises 3 MCBs & an RCD to supply power to 3-pin sockets, heater, water heater etc. as well as the integrated 12V battery charger. The 300W charger can supply up to 25A and is capable of both charging your leisure battery and powering your 12V systems at the same time (the 25A output is shared, e.g. 3A used for powering 12V circuits leaves 22A for battery charging). The 12V distribution system comprises 12 circuits protected with automotive blade (ATO) fuses for powering internal lights, fridge, water pump, hob ignition, ventilation fan, 12V sockets, heater fan etc. as well as protecting the connection to the 12V charger.

EC328 Control Panel

The EC328 control panel is a fully-featured, multi-functional control unit that displays a host of information including battery voltage, battery current, external temperature, fresh and waste water levels, clock with alarm, an event timer (to automatically turn the 12V power on and off at set times) and system warning messages. It has a number of physical buttons with indicator lamps to control functions such as Main 12V power ON/OFF, Pump(s) ON/OFF, Aux power ON/OFF, Battery selection (starter/leisure) etc. and all further information is provided via the LCD display.  The coloured surround used on the EC328 Control Panel is a grey 3-way outer frame from the CBE modular switch & socket system.  It can be swapped for any colour 3-way outer frame so you can match it with the rest of your CBE components, if required.


  • 300W (approx. 25A) Charger /  Power Supply Unit
  • 12 x DC circuits with automotive fuses
  • 3 x 230V AC Miniature Circuit Breakers (10A, 10A, 6A)
  • 1 x 230V RCD
  • Integrated split charge function (Euro 4 vehicles and older)
  • Dual output, 10A PWM solar charge controller
  • Full 12V DC and 230V AC wiring harnesses
  • Fresh water tank level sensors
  • Waste water tank float sensor
  • External temperature probe
  • Suits wet lead-acid batteries*
  • Suggested leisure battery range 75-120Ah
  • Voltage and current displayed for both leisure and vehicle batteries
  • Clock with alarm
  • Power ON/OFF event timer
  • External temperature display
  • Charger ON/OFF power switch
  • Main 12V power switch
  • Water pump power switch
  • Auxiliary power switch
  • Vehicle/leisure battery selector switch
  • 5-level LED battery voltage indicator
  • Low battery level alarm
  • Over-voltage protection
  • Under-voltage protection
  • Over-temperature protection (auto shutdown & restart)
  • Mains reverse-polarity connection
  • Can be used with optional DC-DC charger

May be able to be used with Gel/AGM lead-acid batteries, depending on their composition


This kit is intended for installation in vehicles that have a standard alternator (Euro 4 spec engine or earlier) and the split charging feature will not work effectively in vehicles with a Euro 5 or 6 spec engine.  If you wish to fit this kit in a vehicle with a Euro 5 or 6 spec engine then you will need to disable the split charging feature in the kit and fit a separate battery-to-battery (DC-DC) charger to charge your leisure battery from your alternator. Please contact Sargent directly if you require detailed technical support in relation to this.

Sargent now produces its own DX320 20A DC-DC charger for this purpose which can be found here (other DC-DC chargers can be used).

  • AC input voltage: 230V
  • AC input current: 0-16A
  • AC output protection: 3 x MCB (10A, 10A, 6A) + RCD
  • DC input: 2 x 20A battery inputs via a 6-way connector
  • Solar input: 1 x dedicated solar input via a 4 way connector
  • Solar controller type: PWM, dual output, 10A max.
  • Solar controller maximum open-circuit voltage (Voc): 30V DC
  • Solar panel size: 120W max.
  • DC output: 25A total via 4x 16A switched channels
  • DC output protection: 12 x fused circuits (ATO blade)
  • Integrated charger input: 220-240V AC, 3A max.
  • Integrated charger output: 13.6-14.4V DC , 25A max. (300W)
  • Signal input: 4 x fresh water level, 2 x waste water level, 1 x engine running, 2 x battery temp sensor
  • Data IN/OUT connection: 20-way IDC header connection
  • 230V AC harness length: 2m mains inlet to PSU, 3m PSU to appliances 
  • 12V DC harness length: 5m PSU to connected equipment
  • Ingress protection rating: IP31
  • Operating temperature: 0-35°C
  • Overall dims EC328 PSU: 240(H) x 370 (W) x 110 (D) mm
  • EC328 fixing centres: 210 x 360 mm
  • Overall dims EC328 Control Panel: 80 (H) x 193 (W) x 40 (D) mm
  • EC328 control panel cut-out dims: 60 (H) x 165 (W) mm

Part Number:  K328

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Founded in 1991, Sargent specialises in designing and manufacturing complete electrical systems for campervans, motorhomes, caravans and other leisure vehicles. Sargent is best known for its all-in-one kits which are extremely popular amongst professional and DIY converters alike for their integrated, plug-and-play designs.

Business Hours: Mon - Fri | 9am - 5pm
CALL Sales & Support: 01844 885100
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