Ranein RA65LH 65,000 BTU
#5 in TanklessFull review
A tankless heater rated 65,000 BTU for endless hot water in an RV that has the cutout for it.
Amazon $449$449
The Ranein RA65LH 65,000 BTU is the better RV water heater overall, rated 3.5 to 2.6. The Ranein RA65LH 65,000 BTU leads on value. The Suburban ST-42 (5481A) costs $44.01 less ($404.99 vs $449).
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 Ranein RA65LH 65,000 BTU for value ($6.91 per 1,000 BTU ($449, 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 | Ranein RA65LH 65,000 BTU | Suburban ST-42 (5481A) |
|---|---|---|
| Overall rating | 3.5/5 | 2.6/5 |
| Value 40% | 53 $6.91 per 1,000 BTU ($449, 65,000 BTU) | 35 $9.64 per 1,000 BTU ($404.99, 42,000 BTU) |
| Hot water output 35% | 100 up to 3.9 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
| Ranein RA65LH 65,000 BTU | Suburban ST-42 (5481A) | |
|---|---|---|
| Heat and water | ||
| Input capacity | 65,000 BTU | 42,000 BTU |
| Maximum flow | 3.9 GPM | - |
| Fuel | Propane | Propane |
| Fit | ||
| Weight | 15.5 lb | 21 lb |