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2020 Keystone Cougar 366RDS Fifth Wheel Solar, Lithium, Heated/Massage Seats, King Bed
Price: $52,900 OBO
Location: Westminster, CO
Condition: Excellent
This 2020 Keystone Cougar 366RDS has been well maintained and thoughtfully upgraded for full time living, extended travel, and off grid camping. Clean, comfortable, and truly turnkey, this unit stands out from stock Cougars thanks to a professionally installed solar + lithium power system and premium comfort features.
If youre looking for a Cougar already set up for boondocking, travel days without hookups, and modern comfort, this one is ready to go.
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Key Highlights
Popular rear living floorplan with opposing slides
True king size bed (not a short RV king)
Two rear love seats that convert into fold out beds for extra sleeping capacity
80 gallons fresh water tank excellent for boondocking
Advanced solar + lithium power system
Heated, massage (vibration) theater seating
Upgraded Smart TV

Wireless backup camera

50 amp cord and surge suppressor

Water jugs and folding table
Auto leveling system
Two A/C units
Enclosed underbelly
Power awning with LED lighting
Non smoker owned, well cared for
No known leaks or soft floors; all systems function as they should
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Solar, Lithium & Inverter Power System
Designed for reliable off grid power while minimizing generator use.
(2) Renogy 100W 12V Monocrystalline Solar Panels (200W total)
Renogy Rover 40A MPPT charge controller (supports future expansion)
Complete Renogy mounting and wiring kit
(2) 12V 300Ah LiFePO4 lithium batteries 600Ah total (7,680Wh)
200A BMS rated for 15,000+ deep cycles
POTEK 2000W pure sine wave inverter with AC outlets and USB port
This setup easily powers electronics, kitchen appliances, and travel day loads and provides an excellent foundation for expanding solar capacity if desired.
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Interior & Living Space
Spacious rear living area featuring heated and massage theater seating, two fold out love seat beds, a sofa, and large panoramic windows for excellent natural light. Includes an electric fireplace, upgraded Smart TV, and free standing dinette. Solid surface countertops, a large refrigerator, oven, microwave, and abundant cabinet and pantry storage make this trailer ideal for extended stays or full time use.
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Bedroom & Bath
Private front bedroom with a true king size bed, dual wardrobe slides, washer/dryer prep, and excellent storage. Residential style bathroom includes a large glass enclosed shower, vanity with storage, and dedicated linen space.
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Storage & Exterior
Large basement pass through storage
Aluminum wheels
Power awning with LED lighting
Auto leveling system for quick, easy setup
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Specs & Tow Information (Approximate)
Dry Weight: ~11,280 lbs
Payload Capacity: ~2,720 lbs
Hitch (Pin) Weight: ~2,400 lbs
Length: ~39 ft 4 in
Typically suited for a ¾ ton or 1 ton truck, depending on configuration and available payload. Buyer to verify truck compatibility.
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Title & Loan Information
There is an existing loan balance of approximately $42,000. The sale will be handled securely and transparently, with buyer funds paid directly to the lender for payoff. This is a common, straightforward process, and escrow or title service can be used for added buyer confidence.
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Reason for Selling
Change in travel plans.
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Contact
Message through RVTrader to ask questions or schedule a showing. Serious inquiries only.
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