KingRVer Summit XT 65,000 BTU
#4 in TanklessFull review
A tankless heater rated 65,000 BTU for endless hot water in an RV that has the cutout for it.
Amazon $399.99$399.99
The KingRVer Summit XT 65,000 BTU is the better RV water heater overall, rated 3.5 to 2.6. The KingRVer Summit XT 65,000 BTU leads on value. The KingRVer Summit XT 65,000 BTU costs $5 less ($399.99 vs $404.99).
Prices were last checked November 4, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Suburban ST-42 (5481A)
#14 in TanklessFull review
A tankless heater rated 42,000 BTU for endless hot water in an RV that has the cutout for it.
Amazon $404.99$404.99
Which should you buy?
- Choose the KingRVer Summit XT 65,000 BTU for value ($6.15 per 1,000 BTU ($399.99, 65,000 BTU) vs $9.64 per 1,000 BTU ($404.99, 42,000 BTU)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every tankless RV water heater; a clear win is highlighted. How we rank explains each one.
| Factor weight | KingRVer Summit XT 65,000 BTU | Suburban ST-42 (5481A) |
|---|---|---|
| Overall rating | 3.5/5 | 2.6/5 |
| Value 40% | 60 $6.15 per 1,000 BTU ($399.99, 65,000 BTU) | 35 $9.64 per 1,000 BTU ($404.99, 42,000 BTU) |
| Hot water output 35% | 95 up to 3.8 GPM | 50 maximum flow not published (neutral score used) |
| Warranty 25% | 0 warranty not published, scored as none | 0 warranty not published, scored as none |
Specifications
| KingRVer Summit XT 65,000 BTU | Suburban ST-42 (5481A) | |
|---|---|---|
| Heat and water | ||
| Input capacity | 65,000 BTU | 42,000 BTU |
| Maximum flow | 3.8 GPM | - |
| Fuel | Propane | Propane |
| Fit | ||
| Weight | 20.1 lb | 21 lb |