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Rectangular deck-mount converter charger in matte grey finish with cooling vents and terminal connections

WFCO

WFCO WF-9855 55 A DC 15 A AC Auto Detect Deckmount Converter Charger

SKU CH-VPQP-7TBZT

A deck-mount converter charger delivers 55 A DC and 15 A AC with automatic battery detection and three-stage charging at 13.2 V, 13.6 V and 14.4 V

  • Product typeCar Charger
  • Clean DC power protects sensitive electronics
  • Auto-detect adjusts charging for lithium or lead-acid batteries
  • Three-stage charging extends battery life with 13.2 V float, 13.6 V absorption, 14.4 V bulk
  • FCC Class B compliant so TVs and radios stay interference-free
  • Deck-mount design installs easily with standard safety protections

55 A DC deck-mount converter charger

The WFCO WF-9855-AD-CB delivers 55 A of clean DC power and 15 A AC input for recreational vehicles and marine electrical systems. Its advanced three-stage charger automatically detects lithium-ion or lead-acid battery chemistry and selects the correct profile without user intervention. The unit operates quietly because the cooling fan runs only when required.

Installers needing automatic battery detection

This model suits technicians who want a single charger that self-configures for both lithium-ion and lead-acid banks without buttons or switches. It is not intended for installations that require a fixed, manually selectable charge curve or for systems that demand a higher DC output than 55 A.

Three voltage modes at 13.2 V, 13.6 V and 14.4 V

Float mode holds the bank at 13.2 VDC, absorption mode maintains 13.6 VDC, and bulk mode pushes 14.4 VDC for rapid recharging. Electronic current limiting shuts the converter down instantly during overload or short-circuit events. FCC Class B compliance guarantees no interference with onboard televisions or radios.

How it compares

Measured against everything we stock in Car Audio Accessories & Wiring, at today’s prices. Recalculated every night.

Price $294.99
Pricier than about 91% of the 2,768 comparable items (median $21.99).

Specifications

Product
Product typeCar Charger

Questions about this item

Which battery chemistries must already be installed for the WF-9855 auto-detect feature to select the correct charging profile?

The unit automatically recognises lithium-ion and lead-acid chemistries and adjusts its three-stage charging profile to match the detected battery type.

How does the WF-9855 behave when connected to an older lead-acid house battery that I want to keep?

Auto-detect identifies the lead-acid chemistry and applies the standard 13.2 V float, 13.6 V absorption and 14.4 V bulk modes without any manual switch changes.

What voltage reading on my multimeter confirms the WF-9855 is charging correctly in bulk mode?

In bulk mode the output should read approximately 14.4 V DC, indicating the charger is delivering its quick-charge voltage to the battery.

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