Vertical Power Pps Primary Power System

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Part# 11-15519
MFR Model# KT1458-1


Finally, a simple and reliable primary power solution. The Vertical Power Primary Power System (PPS) is an entirely new approach to the master, starter, and charging circuit on your experimental aircraft or LSA. It combines the functions of multiple high-current, electro-mechanical components into a single, solid-state device that installs in minutes with plug-and-play simplicity. Plus, the high-reliability of the PPS means you won't find yourself stranded on a deserted landing strip without the power to start your plane.

The PPS is a new power distribution component that handles your aircraft's high-current power. It controls the flow of power from the battery to the starter and supplies power to the Vertical Power VP-X (or a traditional bus) for your electrical system loads. The PPS also supports the charging circuit by completing the B-lead connection to the alternator.

System Diagram

  • The PPS, shown on the left side of this diagram, can be installed or retrofitted on an experimental aircraft equipped with the VP-X Electronic Circuit Breaker System or a traditional electrical bus. Visit the Vertical Power System page for more information.



  • Transient protection on all connections
  • The PPS is compatible with systems usinga backup alternator in parallel with the primary alternator. The PPS is not compatible with two-bus systems.

Circuit Ratings

  • Main Bus Output
    • 80 A maximum continuous
  • Starter Output
    • 300 A maximum continuous
    • 1200 A maximum intermittent
  • Alternator Input
    • 80 A maximum continuous
  • Analog Current Monitor Outputs
    • Common-mode reference of 7.5 VDC
    • Scale: 1 mV/Amp
    • Short circuit protected

Environmental / Physical

  • Component Temperature Range: −40C to +85C
  • Storage Temperature Range: −55C to +100C
  • Weight: 1.6 lb (0.72 kg)
  • Operating Voltage:8 36 VDC
  • Low quiescent power: less than 1 mA at 14 VDC and 28 VDC
  • Maximum power
    • 320 mA at 14 VDC
    • 140 mA at 28 VDC


  • Speeds installation easily mount one box instead of 5 or more individual devices.
  • Saves space smaller than the old-style individual components mounted together on the firewall.
  • Clearly labeled for quick connection to electrical system.
  • Reduces exposure to components at battery voltage.
  • Eliminates hazardous and costly wiring mistakes.
  • Highly engineered and proven design no need to solve the challenging puzzle of what components you need and how they should be connected.
  • Delivers higher reliability replaces older mechanical contactors with solid-state technology.
  • Low static power draw of 1 mA won't drain your battery if you forget to turn off your master switch.
  • Integrates perfectly with the Vertical Power VP-X system for a comprehensive solid-state electrical solution.
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Kevin B Verified Purchase


July 12, 2022


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Does this include the wiring harness and hardware kit (both included if ordering directly from Vertical Power)?

Yes, this includes both the connector kit and wiring harness.

Q: Will this support a primary and back up battery?

Per the manufacturer it will not, it is a single battery unit.

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