OWON SPE6103
#3 in Single outputFull review
A compact, programmable 60 V switching supply that gives a lot of range for the money on a crowded bench.
Amazon $139.99$139.99
The OWON SPE6103 is the better bench power supply overall, rated 3.3 to 3.0. The OWON SPE6103 leads on protection & features. The NICE-POWER R-SPS3020 30V 20A wins on value. The OWON SPE6103 costs $2.50 less ($139.99 vs $142.49).
Prices were last checked November 9, 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.
NICE-POWER R-SPS3020 30V 20A
#10 in Single outputFull review
A high-current 30 V switcher for automotive, battery and plating work that needs 20 A without a big bill.
Amazon $142.49$142.49
Which should you buy?
- Choose the OWON SPE6103 for protection & features (over-voltage protection, over-current protection, stored setups vs over-voltage protection, over-current protection).
- Choose the NICE-POWER R-SPS3020 30V 20A for value ($0.24 per watt ($142.49, 600 W rated) vs $0.47 per watt ($139.99, 300 W rated)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every single output bench power supply; a clear win is highlighted. How we rank explains each one.
| Factor weight | OWON SPE6103 | NICE-POWER R-SPS3020 30V 20A |
|---|---|---|
| Overall rating | 3.3/5 | 3.0/5 |
| Value 25% | 68 $0.47 per watt ($139.99, 300 W rated) | 87 $0.24 per watt ($142.49, 600 W rated) |
| Output quality 20% | 33 5 mVrms ripple and noise | 0 ripple and noise not published, scored as the worst |
| Resolution 15% | 50 10 mV / 1 mA setting resolution | 50 10 mV / 1 mA readback resolution |
| PC control 15% | 80 USB with SCPI | 50 PC control not published (neutral score used) |
| Protection & features 10% | 80 over-voltage protection, over-current protection, stored setups | 60 over-voltage protection, over-current protection |
| Warranty 15% | 0 warranty not published, scored as none | 0 warranty not published, scored as none |
Specifications
| OWON SPE6103 | NICE-POWER R-SPS3020 30V 20A | |
|---|---|---|
| Output | ||
| Type | Power supply | Power supply |
| Regulation | Switching | Switching |
| Channels | 1 | 1 |
| Channel ratings | 60 V/10 A | 30 V/20 A |
| Max voltage | 60 V | 30 V |
| Max current | 10 A | 20 A |
| Rated power | 300 W | 600 W |
| Ripple and noise | 5 mVrms / 50 mVp-p | - |
| Precision | ||
| Setting resolution | 10 mV / 1 mA | - |
| Readback resolution | 10 mV / 1 mA | 10 mV / 1 mA |
| Control | ||
| PC interfaces | USB | - |
| SCPI | Yes | - |
| Stored setups | 4 | - |
| Over-voltage protection | Yes | Yes |
| Over-current protection | Yes | Yes |
| Build | ||
| Weight | 3.3 lb | 6.6 lb |