Caltest Instruments - Specialists in power and instrumentation

Caltest – Specialists in Power & Instrumentation

Our mission is to offer the best and most cost effective power supply, test equipment & measurement solutions to our customers.

We work with leading manufacturers to provide effective solutions

Caltest is very proud to be the sole authorised UK distributor and service centre for several leading international manufacturers of power supplies and battery test equipment.

About Caltest Instruments

Caltest has been providing power sources and test instrumentation solutions for over 20 years and are proud to represent a number of industry leading manufacturers.

As well as supplying world class power sources and test instrumentation Caltest also has a service centre and UKAS calibration laboratory.

With a large range of rental and demonstration equipment including AC power sources. Caltest can provide the rental equipment you require within 24 hours of order acceptance.

With a combined experience of almost 200 years in power sources and test instrumentation. Caltest offers unmatched knowledge advice and support. We provide customers with a full range of facilities and service that makes us unique in the distribution industry.

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New Products

ZERA EMOB200 Test Case On-site testing of AC and DC charging stations

With ZERA’s test case EMOB200 you are independent of the mains supply when measuring current and voltage on-site so testing of electric vehicle AC and DC charging stations is simple and easy.

New Products

PPS ASX series

The ASX Series is a family of high performance switching AC Power Sources covering the power range from 1.5kVA to 12kVA. The product line offers both single and three phase models. Units are conservatively designed and output power ratings are based on the most severe combination of input line, output voltage, power factor, and temperature.

New Products

Battery Test System, 9200 Series (NH Research)

NHR’s 9200 series battery test system is ideal for automated characterisation testing, power cycling testing, life-cycle testing & more!

New Products

AFX Series Next Generation AC/DC Power Supplies (Pacific Power Source)

Just over five years ago, Pacific Power Source embarked on a project with the aim to define the next generation family of AC Power Sources. The AFX-Series represent a break-through in solid state power conversion that reduces the size and weight of programmable AC and DC power sources dramatically

New Products

LBT Series Linear Battery Testers (Arbin Instruments)

In the search to develop an ultra-high precision testing system capable of performing coulombic efficiency measurements, an ARPA-E Project was started over three years ago in partnership with Arbin Instruments, Ford Motor Company and Sandia National Lab and in 2016 it has finally seen its culmination.

New Products

9300 Series Battery Test System (NH Research)

NHR’s 9300 series battery test system is a high-voltage, fast-acting, fully programmable, and bi-directional DC source (charge) that provides reversible current flow in order to act as a regenerative DC load (discharge).

New Products

AZX Series Regenerative AC/DC Power Source

The AZX Series is a family of high power, single, split and three phase, AC, DC and AC+DC output capable power sources with full energy recovery to the AC mains when sinking power from the equipment under test. Our available models range from 30 kVA to 200 kVA.

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New Products

EA PSB-10000 Series

The Bidirectional DC power supply with integrated, regenerative electronic load series EA-PSB 9000 and 10000 provides 15kW in 3U or 30kW in 4U chassis with up to 2000 VDC. This series easily parallels supplies for almost 1.92MW of power. All EA Elektro-Automatik DC power supplies and loads feature true autoranging and thus over additional operating ranges.

Caltest Supports These Industry Sectors

Caltest offers a range of high-quality test equipment to support the electric vehicle, alternative energy, and aerospace industries. With AC Power, DC Power & Power Analysers, Motor Testing, Inverter Testing & Storage Testing solutions, Caltest helps ensure the reliability and performance of these industries. Their advanced technology and commitment to customer satisfaction make them a trusted partner for all your testing needs. Discover how Caltest can support your business today.

Calibration & Repair Services

Caltest is the UK’s leading provider of repair and calibration services for electrical testing equipment. We are official partners of the world’s largest manufacturers and operate a UKAS-accredited calibration laboratory ensuring your equipment continues to deliver reliable and accurate test results.


Caltest maintains an extensive inventory of AC and DC power supply equipment, available for rent or lease. We also provide hire purchase agreements to help you access the testing solutions you require without the immediate capital overheads.

Latest News & PR

Electric Vehicle Charger Calibration

As electric vehicles (EVs) become ever more common, one hot question remains unanswered – Why are EV chargers not calibrated in the same way as pumps in fuel stations? In

Visit Caltest Instruments at the Low Carbon Vehicle Event (LCV 2023)

Join Us at the Low Carbon Vehicle Event 2023

Come and see Caltest Instruments at the Low Carbon Vehicle show at Millbrook Proving Ground, Bedford, on the 6th and 7th September 2023, register for FREE. After a successful event