VP-X Pro Electrical System

Electrical System for Experimental Aircraft

Part No:

Manufacturer: VERTICAL POWER

When you're flying an airplane, it’s critical to be able to monitor the status of your electrical system. If you have a glass cockpit, it's even more critical. Only Vertical Power gives you the level of detail and control you need for today’s electric aircraft. The VP-X integrates with many popular EFIS products enabling you to monitor and control your entire electrical system on the EFIS display. In addition using the EFIS for attitude, navigation, and engine information, you now can use the EFIS display to monitor the health of your electrical system, view and control the status of individual circuits, and respond to circuit faults.

Click Here for a VP-X Pro and VP-X Sport Comparison

Click here to see EFIS Displays with Vertical Power

The VP-X System

This system diagram illustrates how the VP-X (shown on the right side) is connected to your electrical loads and other components. Here it is receiving bus power from the Vertical Power PPS (Primary Power System). It can alternatively be connected to a traditional battery contactor. 

Visit the Vertical Power System page for more information on the entire PPS/VP-X system.

The Full-Featured VP-X Pro


The best choice for larger aircraft or those who enjoy enhancing their aircraft with the latest advances in avionics in the future.

The VP-X Pro is our most full-featured Electronic Circuit Breaker System. It includes 32 switched power circuits and the ability to handle both 14V and 28V systems, so it is ideal for the widest range of aircraft. It also features a dual-bank design with dual processors and power supplies for an added level of redundancy and safety. The extra circuits can also provide ample growing room for the future. 

VP-X Advantages

  • Wire from the VP-X directly to each electrical device
  • Detect short circuits, over-current faults, open circuits (no current draw)
  • User-configurable circuit breaker values for each circuit
  • Backup circuit capability for critical avionics
  • Solid-state design – no arcing, no moving parts

EFIS Integration

  • Visually monitor the health of your electrical system
  • View and control the status of individual circuits
  • Immediate notification of circuit faults with the ability to quickly respond
  • Displays for individual and total current draw, main battery voltage, aux battery voltage (if installed), trim position, flap position, and starter engagement

Flap Control

  • Built-in solid-state flap motor control
  • Intermediate flap stops or momentary control
  • Flap over-speed warnings
  • Flap motor run-on protections
  • Disable the flap down switch above a specified airspeed
  • Backup flap controls on the EFIS
  • Flap position display on EFIS

Trim Control

  • Built-in solid-state trim motor control
  • Runaway trim protection
  • Variable-speed pitch trim based on airspeed
  • Backup trim controls on the EFIS
  • Trim position display on EFIS

Switch Inputs

  • Each switch is configurable to control one or more electrical devices
  • Flexibility to use any style of panel-mounted switch

Wig-wag Control

  • Built-in landing light wig-wag control
  • Adjustable warm-up period
  • Landing lights, when turned on, are steady on the ground then automatically pulse when the aircraft is in the air

Alternator Protection

  • Alternator over-voltage protection
  • Single or dual alternator support

Starter Protection

  • Starter disable when engine running
  • Starter engaged annunciator on EFIS
  • Power: 6-32 volts DC, 70A max continuous
  • Weight: 1.9 lbs
  • Mounting: Includes mounting bracket which attaches on side of VP-X. User can fabricate own mounting bracket as well.
  • Connectors: Three power connectors, Ethernet for configuration, and two 25-pin d-sub connectors
  • Operating Temperature: -25 to +85 deg C
Description VP-X Pro VP-X Sport
Processors 2 1
Power supplies 2 1
Volts 14V or 28V 14V
Total switched power circuits 31 23
     15A circuits* 3 3
     10A circuits* 8 7
     5A circuits* 15 8
     3A circuits* 1 1
     2A circuits* 2 2
     1A circuits (trim circuits) 2 2
Starter contactor circuit
Starter annunciator
Pitch trim motor controller
Roll trim motor controller
Reversible flap motor control with braking
Flap and trim position sensor inputs
Switch inputs: Panel/Flap & trim 10/6 10/6
Aux battery voltage measurement
Main power input from PPS or battery contactor
RS-232 interface to EFIS
Ethernet interface to PC
*Circuit breaker value can be set anywhere between 1 amp and the maximum value shown.

Description VP-X Pro VP-X Sport
Electronic circuit breakers used throughout
Panel switch inputs to turn devices on/off
(6 more for trim and flaps)
10 10
Solid-state short circuit protection
Over-current protection for each circuit
(fully configurable)
User re-settable circuit protection On EFIS On EFIS
Open-circuit detection (detects burned out landing light, inop boost pump, etc.)
Status (on, off, fault) of each electrical device On EFIS On EFIS
Display of real-time current draw per circuit On EFIS On EFIS
Display of overall aircraft current draw On EFIS On EFIS
Low-voltage alarm On EFIS On EFIS
Over-voltage alert
Over-voltage protection
and automatic alternator shut-off
Single alternator support
Dual alternator support
Supports internally-regulated alternators
Supports externally-regulated alternators
(voltage regulator must be used)
Supports B&C and Plane Power alternators
Supports single battery electrical system configuration
Graphical display of electrical system and status of components
Backups for critical avionics
Switched power circuits (1A to 15A capacity) 31 23
Dual internal electrical banks per power distribution unit
Aux battery voltage display

Description VP-X Pro VP-X Sport
Configure system using: PC PC
Works with 14 volt electrical systems
Works with 28 volt electrical systems

Description VP-X Pro VP-X Sport
Solid-state trim control system
Trim circuits (motor and position feedback) 2 2
Runaway trim protection
Backup pitch trim control
Trim position indicators On EFIS On EFIS
14v regulated trim motor output (no need to buy DC-DC converter for 28v systems)
Automatic variable speed trim motor to reduce trim sensitivity at higher speeds
Power-on trim switch fault detection

Description VP-X Pro VP-X Sport
Solid-state flap control system
Flap circuits (motor and position feedback) 1 1
Electronic motor braking
Flap position display On EFIS On EFIS
Flap over-speed warning (user configurable)
Disable flap down switch above specified airspeed
Momentary flap operation (moves when switch pressed)
Position based flaps (moves to next configurable position)
Flap motor run-on protection
Power-on flap switch fault detection

Description VP-X Pro VP-X Sport
Wig-wag automatic when above specified speed
Light warm-up period (configurable)

Description VP-X Pro VP-X Sport
Disable starter while engine running
Starter engaged annunciator

See below for answers to our most popular questions.

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