RV WF-8955-MBA 55 Amp Converter - Quiet, Easy Replacement

In this review the RV WF-8955-MBA 55 Amp Converter is evaluated for owners who need a direct replacement power converter for WF-8955 and Parallax 7155 systems; the bottom line is that it delivers dependable 55 A charging and very straightforward installation. The reviewer found the unit especially useful for DIY RV technicians and anyone swapping a worn converter because it fits the WF-8955PEC form, uses simple AC wiring cues, and keeps noise low by running its cooling fan only as needed.

Key Features

• Simple wiring: White labeled Live and Black labeled Neutral plus Green ground make AC connections intuitive and reduce the chance of wiring error during replacement.
• Easy installation: The unit installs with just four screws and five wires, so the swap can be completed without complex disassembly of the power center.
• Direct compatibility: Designed as a replacement for WF-8955 and Parallax 7155 converters and fits WF-8955PEC without modification.
• Quieter operation: A demand-driven cooling fan runs only when required, keeping the converter nearly silent under normal loads.
• 55 amp output: Provides a steady 55 A DC output suitable for charging typical RV battery banks and supporting onboard DC loads.

Who It's For

The RV WF-8955-MBA is aimed at RV owners and technicians who need a like-for-like replacement for older WF-8955 or Parallax 7155 units, or anyone upgrading a power center such as the 7145/7155. It fits installers who prefer a quick, mechanical swap with minimal wiring complexity and who value quiet operation during campsite use.

It is less suited for users who need multifunction power centers with built-in inverter functions or advanced battery management beyond basic converter charging; those looking for integrated inverter-charger combos or smart multi-stage lithium-specific chargers should consider other products.

Pros & Cons

Pros

• Easy, straightforward installation that fits the WF-8955PEC and similar mounts.
• Reliable 55 A DC output adequate for most travel trailer battery banks and loads.
• Quiet operation because the fan engages only under higher load, improving campsite comfort.
• Clear wiring labels reduce installation mistakes and speed up replacement.

Cons

• Charging capacity received mixed feedback, so those with high-demand setups should verify charging behavior for their specific battery chemistry.
• Not a full inverter or advanced charger, so additional equipment may be needed for off-grid inverter loads or specialized lithium charging profiles.

Specifications

Output Power	55 amps DC output
Output Current	55 A
Input Voltage	105-130 VAC
Input Frequency	60 Hz
Mounting	Fits WF-8955PEC and Parallax 7145/7155 power centers
Wiring	White live, Black neutral, Green ground (5 wires total)

Our Verdict

The WF-8955-MBA 55 Amp Converter is a practical, value-oriented replacement for WF-8955 and Parallax 7155 owners who need reliable 55 A charging and an easy swap-in process. Its quiet operation and clear wiring labels make it a sensible choice for DIY installers replacing an aging converter, though buyers needing built-in inverter capability or specialized lithium charging should pair it with additional components.

Frequently Asked Questions

Does this unit fit the WF-8955PEC power center?
Yes, it is reported to fit the WF-8955PEC without modification and is intended as a direct replacement.

How difficult is the installation?
Installation is simple: the converter uses four screws and five wires and includes labeled AC wiring to speed the process.

Is the cooling fan noisy?
No, the cooling fan runs only when needed by the load, so normal operation is quiet according to user feedback.