SP-320-13.5 Power Supply 13.5V 22A - Reliable Auto-Switching

In this review the SP-320-13.5 is evaluated as a practical, no-frills industrial power module for projects that need a stable 13.5V supply. The reviewer found it most useful for bench power, embedded systems, and equipment that require continuous DC power where efficiency and a single strong rail matter. Its primary selling point is a solid 297 W single output delivered in a compact metal housing, making the unit a straightforward choice when a dependable, auto-switching ac to dc power supply is required.

Key Features

• Single 13.5V output: Provides a focused 22 A rail that simplifies wiring and avoids multi-output complexity for single-voltage systems.
• 297 W continuous power: Handles moderate to heavy loads for LED drivers, test rigs, and embedded controllers without immediate thermal concerns.
• Auto-switching type: Automatically adapts to input conditions so it can be used in different regions or setups without manual switching.
• Compact metal housing: The 8.5 in x 4.5 in x 2.0 in enclosure is space-efficient for internal mounting or tight bench layouts.
• 86% efficiency: Delivers relatively high conversion efficiency which reduces waste heat compared with less efficient supplies in similar classes.

Who It's For

The SP-320-13.5 is aimed at technicians, hobbyists, and small-scale integrators who need a dependable single-rail power source for equipment like controllers, LED systems, or test benches. Its fixed 13.5 V output and 22 A capacity suit projects where a single regulated DC voltage simplifies design and installation.

It is less suitable for users who need multiple isolated outputs, variable voltage, or ultra-compact consumer electronics adapters. If you require programmable sequencing, remote monitoring, or a regulated lab power supply with fine voltage/current adjustment, consider a different product designed for those features.

Pros & Cons

Pros

• Clear, high-capacity single output that simplifies power distribution for 13.5 V systems.
• Auto-switching input makes deployment easier across different AC supplies without manual selection.
• Good energy conversion at 86% efficiency reduces heat compared with lower-efficiency modules.
• Compact metal chassis fits into many internal power bays or bench setups.

Cons

• Fixed voltage means no onboard adjustment for projects that need variable output.
• Basic feature set lacks remote control or monitoring found in more advanced supplies.

Specifications

Product type	ac to dc power supply
Output voltage	13.5 V
Output current	22 A
Output power	297 W
Efficiency	86 percent
Type	auto switching
Dimensions (L x W x H)	8.5 in x 4.5 in x 2.0 in

Our Verdict

The SP-320-13.5 is a solid, value-focused single-output power supply for users who need a reliable 13.5 V, 22 A rail in a compact metal package. Its auto-switching input and 86% efficiency make it a practical choice for installations and bench use where adjustable features are not required. For teams and hobbyists needing a straightforward, robust single output power supply, it offers good utility and predictable performance for the price.

Frequently Asked Questions

Is this supply suitable for continuous operation?
Yes. The unit is rated for continuous output at 13.5 V and 22 A within its thermal limits, making it appropriate for long-running equipment.

Can the output voltage be adjusted?
No. The SP-320-13.5 provides a fixed 13.5 V output and does not include an onboard adjustable regulator for changing the voltage.

Does it support international AC inputs?
Yes. The auto-switching type adapts to common AC input ranges, simplifying use in different regions without manual input selection.