9855-AD 55 Amp Deck Mount Power Converter/Charger Replacement - Quiet

Our review of the 9855-AD 55 Amp Deck Mount Power Converter/Charger Replacement finds it best suited for RV and camper owners who need a straightforward, reliable DC power source and a drop-in replacement for the 9800 series. The biggest reason to buy is its clean 55 amp output and automatic three-stage charging, which keeps house batteries healthy without causing interference to electronics. Installation is simple for anyone familiar with RV electrical compartments, and the unit's quiet fan and electronic current limiter make it a dependable option for long trips.

Key Features

• 55 amp DC output: Delivers a stable 55 amp supply to run multiple appliances and onboard electronics without voltage spikes.
• Clean power for sensitive electronics: Provides filtered power that will not interfere with television, radio, or other signals inside the RV.
• Automatic three-stage charging: Maintains battery life through bulk, absorption, and float charge modes for long-term battery health.
• Electronic current limiter: Protects against overloads and short circuits by automatically shutting down when conditions require it.
• Smart cooling fan: The fan only runs when needed, keeping operation quiet during most use and reducing wear.
• Direct replacement design: Designed as a replacement for the 9800 series, simplifying repairs without replacing the entire unit.

Who It's For

The 9855-AD is ideal for RV owners, camper van conversion builders, and trailer technicians who need a dependable deck mount power converter with straightforward installation and solid battery charging. It suits users who prioritize quiet operation and clean power for TVs and radios during travel or at the campsite.

Those who should look elsewhere include users who need integrated inverter capability or higher amperage for heavy-duty off-grid systems, and buyers requiring smart remote monitoring features that are not described for this model.

Pros & Cons

Pros

• Reliable 55 amp output that powers multiple onboard appliances without noticeable interference.
• Automatic three-stage battery charging that helps prolong battery life.
• Easy to install as a replacement for the 9800 series, with customers reporting it plugs right into place.
• Quiet operation because the cooling fan runs only when required.

Cons

• Does not include an inverter or advanced remote monitoring features, limiting use for fully off-grid setups.

Specifications

Model	9855-AD (9800 series replacement)
Output current	55 amp DC
Battery charging	Automatic three-stage charging
Protection	Electronic current limiter for overload and short circuit
Noise	Cooling fan operates only when needed for quiet operation
Interference	Designed not to cause TV or radio interference

Our Verdict

The 9855-AD 55 Amp Deck Mount Power Converter/Charger Replacement is a practical, cost-effective swap for 9800 series owners who need clean, quiet DC power and reliable battery maintenance. It is good value for RV users who want a durable converter that installs easily and protects batteries, though those needing inverter capability or remote telemetry should consider other options.

Frequently Asked Questions

Will this unit interfere with my RV TV or radio?
The unit is designed to provide clean power and customers report it does not cause interference with television or radio signals.

Is it difficult to install as a replacement?
Customers describe the 9855-AD as easy to install and a direct replacement for the 9800 series, often plugging into the same location without complex modifications.

How does the unit protect against faults?
An electronic current limiter automatically shuts off the power supply under overload or short circuit conditions to protect wiring and components.