Rigol DL3021
A well-supported programmable load for testing power supplies and batteries in an electronics lab.
Amazon $549$549
The Rigol DL3021 is the better bench power supply overall, rated 3.8 to 3.4. The Rigol DL3021 leads on output quality. The OWON OEL1530 wins on value. The OWON OEL1530 costs $333.01 less ($215.99 vs $549).
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.
OWON OEL1530
A low-cost 300 W programmable load for battery capacity and power-supply testing on a hobby bench.
Amazon $215.99$215.99
Which should you buy?
- Choose the Rigol DL3021 for output quality (15 kHz dynamic mode vs 5 kHz dynamic mode).
- Choose the OWON OEL1530 for value ($0.72 per watt ($215.99, 300 W rated) vs $2.75 per watt ($549, 200 W rated)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every electronic loads bench power supply; a clear win is highlighted. How we rank explains each one.
| Factor weight | Rigol DL3021 | OWON OEL1530 |
|---|---|---|
| Overall rating | 3.8/5 | 3.4/5 |
| Value 25% | 17 $2.75 per watt ($549, 200 W rated) | 55 $0.72 per watt ($215.99, 300 W rated) |
| Output quality 20% | 80 15 kHz dynamic mode | 47 5 kHz dynamic mode |
| Resolution 15% | 75 1 mV / 1 mA setting resolution | 75 1 mV / 1 mA setting resolution |
| PC control 15% | 80 USB, RS232 with SCPI | 80 USB, RS232 with SCPI |
| Protection & features 10% | 80 over-voltage protection, over-current protection, remote sense | 80 over-voltage protection, over-current protection, remote sense |
| Warranty 15% | 100 3-year warranty | 0 warranty not published, scored as none |
Specifications
| Rigol DL3021 | OWON OEL1530 | |
|---|---|---|
| Output | ||
| Type | Electronic load | Electronic load |
| Channels | 1 | 1 |
| Channel ratings | 150 V/40 A, 200 W | 150 V/30 A, 300 W |
| Max voltage | 150 V | 150 V |
| Max current | 40 A | 30 A |
| Rated power | 200 W | 300 W |
| Dynamic mode | 15 kHz | 5 kHz |
| Load modes | CC, CV, CR, CP | CC, CV, CR, CP |
| Precision | ||
| Setting resolution | 1 mV / 1 mA | 1 mV / 1 mA |
| Readback resolution | 1 mV / 1 mA | 1 mV / 0.1 mA |
| Remote sense | Yes | Yes |
| Control | ||
| PC interfaces | USB, RS232 | USB, RS232 |
| SCPI | Yes | Yes |
| Over-voltage protection | Yes | Yes |
| Over-current protection | Yes | Yes |
| Build | ||
| Weight | 16.7 lb | 5.5 lb |
| Warranty | 3 years | - |