WF-9855-MBA 55 Amp RV Power Center Main Board Replacement for WFCO 9800 Series
 

WF-9855-MBA 55 Amp RV Power Center Main Board Assembly

Core Features

  • Enhanced Automatic Detection: Next-generation auto-detection technology for lithium (LiFePO4) and lead-acid (AGM/flooded/gel) batteries, with optimized charging profiles for faster, safer charging and extended battery cycle life.
  • Advanced Safety Mechanisms: Built-in overcurrent protection, reverse polarity protection, over-temperature shutdown, and surge protection; fully compliant with UL 458, RVIA, and NEC safety standards with visual and audible fault alerts.
  • Plug-and-Play Installation: Drop-in replacement for WF-9855 power center main boards, requiring only basic hand tools and 15 minutes or less for complete installation—no wiring modifications needed.
  • High-Efficiency Conversion: 85%+ power conversion efficiency reduces energy waste and heat generation, ideal for off-grid and boondocking RV applications.

Key Parameters

Parameter Name Detailed Specifications
Output Current 55 Amps continuous (12V DC)
Input Voltage/Frequency 90-130V AC, 50/60Hz (universal input)
Output Power 800 Watts continuous, 1000 Watts peak
Output Voltage Range Lithium: 14.2-14.6V DC; Lead-Acid: 13.6-14.4V DC (adjustable)
Efficiency ≥85%
Dimensions 7.125" (W) × 4.0" (H) × 2.25" (D)
Weight 4.8 lbs (2.18 kg)
Converter Type 4-stage smart charger (bulk/absorption/float/maintenance)
Warranty Period 1 Years limited warranty

Compatibility & Replacement

  • Direct replacement for WF-9855 RV power center main boards
  • Backward compatible with WF-8955 power centers (adapter included)
  • Compatible with all 9800 series WFCO power centers (9835, 9845, 9855)
  • Replaces obsolete Parallax 7155/7145 main board assemblies with no adapter required

Warranty Service

Warranty Information

1-year limited manufacturer's warranty

Coverage: Defects in materials and workmanship; includes technical support

Important Notes
  • Always disconnect AC power and disconnect battery terminals before installation to prevent electrical hazards.
  • For lithium battery systems over 200Ah, verify wire gauge (minimum 4 AWG) to maintain optimal charging performance.
  • Not compatible with 120V AC direct hardwiring—use only with WF-9800 series power centers.
100% satisfaction goal.
If you have had less than 100% positive experience, please contact us, so we can work out a resolution.
Your questions will be replied within 24 hours except the weekend and holiday. 
We will serve for you with all sincerity!

☑ DOT/SAE approved

☑ E-Mark approved

☑ CCC approved

☑ More than 50 national patents of products and technology 

We do not ship to Hawaii, Alaska, Puerto Rico, PO Boxes, APO's, FPO's, or Military Mail Boxes
We will process your order and provide a tracking number within 48 hours (except weekends and holidays) after payment is received correctly.

1. Our 30-days Satisfaction Guarantee allows customers to return new and unused products in their original factory condition for any reason within 30days from the date of purchase.

2. All returns must be preapproved by us and have a return label. Unauthorized returns will not be accepted. Please keep item in resell condition. Used items will not be accepted for return.

3. Prompt refund will be implemented after we received item in good condition.

Customer service from Monday to Friday.

Response will be within 24 hours, not including weekend or holidays.
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