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DC Power Supply

Programmable unidirectional DC power supplies from Preen, spanning compact rack-mount units to general-purpose bench and production test systems.

Unidirectional DC power supplies source DC power only — no regeneration or sink capability — making them the simpler, more cost-effective choice for the majority of lab bench, production-line, and burn-in applications where a device under test only needs power delivered to it. They're used across component and sub-assembly test, EV motor and PV inverter input simulation, battery charging, and general R&D bench work wherever a stable, adjustable DC source is needed in place of a fixed supply.

Below, Preen's ADC and ADG-L lines cover rack-mount production and general-purpose bench needs.

Preen
Available as a Containerized / IP54 Option
Every Preen DC power supply below can be built into a customized outdoor container or upgraded to an IP54-rated enclosure, following the same approach as Preen's dedicated BPS shore power range — useful for ports, construction sites, remote installations, and other high humidity, heat, dust, or corrosion-exposed environments. Standard indoor chassis remain the default; contact Finch to configure a containerized or IP54 version for your application.
Preen ADC Series
ADC Series
Rack Mount DC Power Supply, 2-8kW per Unit
Preen's classic rack-mount DC power supply for production line, burn-in test, and integrated system use where cost-per-kW matters more than advanced programmability, paralleling up to 24-64kW.
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Preen ADG-L Series
ADG-L Series
Compact Programmable DC Power Supply, 3U Chassis
A compact 3U programmable supply with high power density — 12kW in 3U, or 30kW in 6U paralleled — with auto-range models for combined high-voltage/high-current fuse, breaker, and battery test.
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