Reliance Pro/Tran 2 306CRK
#14 in 30 AFull review
The Pro/Tran 2 successor to the popular 31406CRK, with everything needed for a small backup setup. A good fit for a fridge, furnace and a few lights on a 30 A generator.
Amazon $345.71$345.71
The Reliance Pro/Tran 2 306CRK is the better transfer switch overall, rated 3.5 to 3.3. The Reliance Pro/Tran 2 306CRK leads on features. The Reliance Pro/Tran 2 306D wins on value. The Reliance Pro/Tran 2 306D costs $41.91 less ($303.80 vs $345.71).
Reliance Pro/Tran 2 306D
#18 in 30 AFull review
The bare bones six circuit Pro/Tran 2. Only worth buying when it is cheaper than the 306C.
Amazon $303.80$303.80
Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Reliance Pro/Tran 2 306CRK for features (wattmeters, inlet box included, UL listed vs UL listed).
- Choose the Reliance Pro/Tran 2 306D for value ($50.63 per circuit ($303.80, 6 circuits) vs $57.62 per circuit ($345.71, 6 circuits)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 30 A transfer switch; a clear win is highlighted. How we rank explains each one.
| Factor weight | Reliance Pro/Tran 2 306CRK | Reliance Pro/Tran 2 306D |
|---|---|---|
| Overall rating | 3.5/5 | 3.3/5 |
| Value 35% | 40 $57.62 per circuit ($345.71, 6 circuits) | 49 $50.63 per circuit ($303.80, 6 circuits) |
| Circuits 25% | 33 6 circuits | 33 6 circuits |
| Features 20% | 75 wattmeters, inlet box included, UL listed | 25 UL listed |
| Warranty 20% | 100 5-year warranty | 100 5-year warranty |
Specifications
| Reliance Pro/Tran 2 306CRK | Reliance Pro/Tran 2 306D | |
|---|---|---|
| Switching | ||
| Type | Manual | Manual |
| Circuits | 6 | 6 |
| Generator connection | 30 A | 30 A |
| Max generator | 7,500 W | 7,500 W |
| Voltage | 120/240 V | 120/240 V |
| Wattmeters | Yes | No |
| In the box | ||
| Inlet | L14-30 | none (wire to a separate inlet box) |
| Inlet box included | Yes | No |
| Generator cord included | Yes | No |
| Build | ||
| Outdoor rated | No | No |
| UL listed | Yes | Yes |
| Warranty | 5 years | 5 years |