We provide products and bespoke design services for mobile and static electrical power for remote installations and temporary sites. We can deliver system components and complete power solutions ranging from simple battery back-up supplies to complete micro-power generation and management systems. 

Our professional engineering design and integration services enable Greeve to implement systems that fully satisfy customer requirements based on proven reliable technologies. Greeve’s standard product range includes Split Charge Isolators, Power Source Control, Power Distribution Units and Networked Power Management.

Power Distribution Units

The PDUs include standard AC and DC units supplied in stand-alone, rack-mount or DIN rail options. The range extends from simple industrial to fully militarised systems.

Uninterruptible Power Supplies

Greeve’s range of uninterruptible power supplies offer reliable back-up power using unique battery management technologies that increase battery life and reduce overall cost of ownership.

Power Source Controller

The Power Source Controller takes multiple input power sources and routes the most suitable power to the load. It automatically balances the load between the inputs and copes with dynamic power demand surges.

Battery Management

The battery management products include simple split charge controllers, battery load management, battery condition monitoring, and intelligent control of power to prioritised loads.

Complete Systems

Greeve can supply complete micro-power systems ranging from simple back-up battery power to remotely monitored and controlled generator based installations integrating mains and DC supplies.


Applications for Greeve’s range of power products and bespoke systems installations include: supplying power to remote instrumentation; back-up power for small pumping stations; power for IT infrastructure on temporary sites; communications power for military applications.

Networked Power Control

The Greeve Networked Power Control System (NPCS) provides reliable, simple installation of networked switching for all platform electrical loads. Instead of wiring individual switches and power cables to each load a simple power bus and a communication network bus are wired around the platform. Power is switched to the loads using a network command to satellite nodes located near the loads.

The NPCS is made up of two basic components: a central control unit (CCU) and remote interface nodes (RIN). The CCU acts as the brains of the system and interfaces with local switches and controls and sends out switch messages to the RINs via the network. The RINs accept messages addressed to their specific loads and switch them on and off. In addition the CCU has a number of directly switched outputs.


The Networked Power Control System can be used in a wide range of applications, including commercial and hobby mobile platforms such as off-road vehicles, kit cars, in-shore and sea-going powered and non-powered boats and yachts, caravans and motorhomes, as well as small military vehicles.

NPCS Standard Features

  • Environmental Protection – IP67
  • Shock – 50g all surfaces
  • Operational Temperature -30°C to +80°C
  • CAN II interface
  • USB 2.0
  • CCU – 6 Switch/PWM 4A outputs
  • RIN – 2, 4 or 6 switch 4A outputs (2 PWM)
  • Self-protected against load faults
  • Protected against supply faults
  • Power 7 to 18v DC (24v – 36v option)

Battery Management Unit

The Greeve Ideal Battery Management Unit is designed to enable the optimum use of batteries in a back-up power system. The Ideal Battery Management Unit enables a number of batteries to be charged independently and the load to be balanced across each individual battery. This enables both the battery charging and the loading to be optimum for each 12v cell. The use of the Ideal Battery Management Unit negates the need for parallel and series battery installations with the inherent damage to weaker batteries under charge and load.


The battery Management Unit can be integrated with other Greeve products to build a complete power management and monitoring system including automatic power source selection, power source failure monitoring, and battery health monitoring.

Bespoke Development

Greeve can provide systems to meet exact requirements; please enquire for details. Enquire about optimum voltage and power ratings for your application.

BMU Standard Features

  • Solid state technology
  • No relays
  • No diode voltage drop
  • Prolongs battery life
  • Optimises available power
  • Reduces cost of ownership
  • Customisable enclosures

Power Source Controller

The Greeve Power Source Controller (PSC) is designed to satisfy the need to monitor a main source of electrical power and switch to a backup supply when the main source fails. It provides contactless switching between two DC power sources which can come from mains powers supplies, backup battery banks, wind turbines, generators, photo-voltaic panels or any form of power source.

The PSC uses solid state MOSFET technologies so there are no relay contacts to wear or generate interference and switching time is very low compared to relay based solutions. The PSC can be supplied integrated with a mains supply and output DC-DC converters or as a basic switch unit for connection to your own supplies and loads. It acts in the same way as an Uninterruptable Power Supply but gives the options of alternative sources of secondary power and the ability to size a battery bank to suit the load.

The PSC can be fitted with an optional battery charge system for applications where the secondary source is supplied by battery. The unit can be provided as a stand alone component, as a DIN rail mount component, or as a complete back-up supply with multiple output voltages. Options for higher numbers of input channels are available to enable very robust power source switching systems to be built.

PSC Standard Features

  • Environmental protection: up to IP67
  • Shock: 50g all axis
  • Operational temperature: -30°C to 80°C
  • Volt free status contacts

Power Distribution Units

The Greeve Power Distribution Units offer a wide range of capability to suit the requirements for the distribution of mains and DC power in mobile and static installations.

On any system the routing, protection and switching of the various power demands can turn a simple concept into a wiring nightmare. On top of that, ad hoc wiring configurations can overload system capabilities and be less than safe. The use of power distribution panels and boxed units ensures that power is distributed around the system safely within the supply limitations and that faults on individual loads do not cause complete system failures.

Greeve’s PDUs provide safe, controlled and reliable installations of power that ensure system availability when it’s needed.

The simplest systems offer direct protected connection from single source inputs to multiple output connectors. The units can include channel switching, fusing and filtering. More complex systems include automatic selection from multiple input sources, power conversion and power switch-on sequence timing to prevent surges.

PDU functions can be combined with Greeve’s range of Uninterruptable Power Supplies to provide very secure and reliable distributed power for a wide range of applications. Further options include remote monitoring and control via CAN Bus, Ethernet or even over the Internet.

System Options and Capabilities:
Greeve can supply both ‘off the shelf’ systems and bespoke units integrating a variety of capabilities and technologies, including:

  • Fused outlets providing connectivity and circuit protection for individual loads.
  • Filtered and fused to run sensitive equipment in arduous conditions.
  • Power conversion (AC to DC and DC to DC) – single and multi-voltage options
  • Power inversion (DC to AC) – from a 100 watts to kilowatts
  • Power line status monitoring and alarming 
  • Volt-free contacts, alarm drivers or network (CAN Bus or Ethernet), web enabled
  • Power supply networked condition monitoring – networked and/or web enabled
  • Power-on sequencing and timing – configurable
  • Automated power source selection – transfers loads to the best power source
  • Load sharing – shares loads between power sources
  • Battery backup and charging – provides UPS capability and reliability
  • Remote switching control – networked and/or web enabled
  • Rack mount, DIN rail or stand-alone packaging from commercial to military spec.

PDU Standard Features

  • Multi source input
  • Circuit protection
  • Filtering
  • Monitoring and alarms
  • Remote interfaces
  • UPS compatible

Split Charge System

A split charge system enables you to charge two or more batteries from the same alternator or charger without the risk of the loads on either battery discharging the other battery. Greeve offers two versions of split charge system and you should choose the system that most closely fits your needs.

If all you want is a second battery that keeps a fridge and other devices running when the engine is turned off without the risk of draining the automotive/starter battery, and your auxiliary devices draw no more than 16Amps combined, you only need the basic Split Charge Unit (part No GK093020).

If you want to be able to draw higher currents while the engine is running or you want to occasionally use both batteries to supply high current devices you will need the Split Charge Power Unit (part No GK093010).

The basic Split Charge Unit is a voltage sensing solid state switch that will provide charging current to a second battery if the charge voltage is above 13.5v. When the batteries are not being charged or if the charge voltage is too low the auxiliary battery is isolated and no current is drawn from the starter battery by the auxiliary equipment.

Basic Split Charge Unit

  • Solid state switch
  • Charge above 13.5V
  • Low Voltage Isolation
  • 8 or 16 Amps
  • Overload and Short Circuit Protection
  • No Additional fuses

Split Charge System

  • As above but with solenoid contactor
  • Max continuous current 200A
  • Manual override
  • Timer for isolation