What Master Instruments does

Master Instruments is an Australian battery manufacturer, distributor, and custom battery pack assembler headquartered in Sydney, founded in 1942 and operating as a third-generation family-owned business under the Dunn family. The company maintains four state offices across New South Wales, Victoria, Queensland, and Western Australia, employing 100–120+ staff, and operates on a strictly B2B basis, requiring customers to hold an Australian Business Number (ABN).

Its core offering spans primary and rechargeable batteries (lithium, lead-acid, NiMH), chargers, battery management systems (BMS), solar storage components, and power conversion products, supported by UN38.3 testing through SGS and ISO 9001:2015 certification. Master Instruments produces proprietary brands — Drypower, ENEPOWER, TURTLE (chargers), and the MI series — while distributing tier-1 international brands including Victron Energy, MG Energy, Pylontech, SAFT, NOARK, Fronius, Delta-Q, Voltgo, Sunman, Wakespeed, Cadex, and Arbin, with the catalogue exceeding 8,000 product lines and 11,000 products available online.

The business model combines (i) distribution of third-party battery and energy storage brands with principal or master-level agreements, (ii) custom battery pack design and assembly for OEM customers, and (iii) technical support and certification services that qualify the company into regulated industries. End-customer segments span defence primes (Northrop Grumman, Thales, Australian Department of Defence), mining and resources (BHP, Rio Tinto), telecommunications (Telstra), medical devices (Cochlear, ResMed), healthcare infrastructure (Ramsay Health Care), utilities (Ausgrid, Water Corporation), research organisations (CSIRO, ANSTO), consumer electronics and mobility (Samsung, Subaru, Ducati, Qantas), and broad retail/wholesale channels (Bunnings, Battery World, Coles, ABB, Schneider Electric). In 2026 the business took its first institutional capital from the KSB Transition Fund (a Kilara Capital/Salter Brothers joint venture), appointed Bruce Rayment as CEO, and was elevated to Fronius Special Partner status, marking a transition from family ownership into its next phase of professionalized growth.

Name

Master Instruments

Legal name

Master Instruments Pty Ltd

Website

https://master-instruments.com.au

Company type

Private

Founded year

1942

Operating status

Operating

Headcount range

101–250 employees

Short description

Master Instruments is an Australian B2B battery manufacturer, distributor, and custom pack assembler serving defence, mining, telecom, medical, and industrial OEMs across Australia and Oceania under proprietary brands (Drypower, ENEPOWER, TURTLE) and tier-1 global partnerships (Victron, SAFT, Fronius).

Ownership category

akta.pro rank

Product category

Battery Manufacturing & Distribution

NAICS

Battery Manufacturing (33591), Battery Manufacturing (335910), Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515)

SIC

Electronic & Other Electrical Equipment (No Computer Equip) (3600), Industrial Instruments For Measurement, Display, And Control (3823)

akta.pro primary industry

Battery Pack Manufacturing & Module Assembly (EUAFABAI)

akta.pro secondary industries

Battery Modules & Packs (Industrial/Commercial pack assembly) (IMAGAHAB), Battery Management Systems (BMS) & Battery Electronics (IMAGAHAC), Batteries & Battery Packs (Rechargeable/Primary, Device-Specific Packs) (CRACATAG), Battery Management Systems (BMS) & Safety Controls (EUAFAAAD)

Keywords

• Battery manufacturing
• Battery distribution
• Custom battery packs
• Power solutions
• Battery engineering

Headquarters

HQ city

Sydney

HQ country

Australia

HQ region

Oceania

Offices5 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Battery & Power Product Sales: Sale of primary and secondary batteries, battery packs, battery chargers, solar panels, power inverters, power supplies, and associated accessories. Products span consumer, industrial, and OEM markets. Revenue generated through direct sales, account sales, and wholesale distribution.
2. Custom Battery Pack Assembly Services: Custom battery pack manufacturing and assembly services. Standard assembly incurs manufacturing cost of $1.50 per cell. Additional charges for flying leads, connectors, solder tags, PCB pins, and Certificates of Conformance ($25.00 per certificate).
3. UN38.3 Testing & Certification Services: Battery safety testing and certification services through SGS including UN38.3 testing, IEC 62133 Standard battery safety testing, and environmental conditions testing. Offered in association with contracted partner assemblers in Taiwan and Asia.
4. DC Power & Solar Solutions: Sale and distribution of solar panels, solar charge controllers, inverter chargers, battery storage systems, and power conversion equipment for industrial, commercial, and residential applications.

Pricing tiers

Go-to-market motion3 records

Distribution channels5 records

Marketing channels8 records

Core offering

Master Instruments manufactures, imports, distributes, and designs bespoke battery pack assemblies and power solutions. The company offers Australia's largest range of industrial and consumer primary and rechargeable batteries, battery chargers, battery management systems (BMS), solar panels, inverter chargers, and power conversion equipment across multiple chemistries including NiCd, NiMH, Lithium, SLA, LiIon, LiIon Polymer, LiFePO4, Primary Lithium, Silver Oxide, Zinc Air, and GEL. It operates the MI Link B2B e-commerce platform and provides custom battery pack engineering, assembly, testing, and certification services.

Product overview

Master Instruments is a 100% Australian owned battery engineering, manufacturing, and distribution company established in 1942. The company offers Australia's largest range of industrial and consumer primary and secondary batteries and battery packs, battery chargers (from consumer to specialised industrial types), battery analysers, solar solutions, power products, and comprehensive battery assembly parts. Their product portfolio includes proprietary brands (Drypower, ENEPOWER BMS, TURTLE Chargers, MI Battery Experts) alongside distributed brands (Pylontech, MG Energy, Victron Energy, SAFT, NOARK, Fronius, Delta-Q, Voltgo, Sunman, Wakespeed, Cadex). Services include custom battery pack solutions, custom charging solutions, and battery testing & analysis using Arbin Instruments equipment. The company operates the MI Link B2B e-commerce platform for account holders. Master Instruments holds ISO 9001:2015 certification and provides UN38.3 testing services through SGS.

Differentiator

Problem solved

Functional benefit

Brands

• MI LINK: B2B e-commerce clever commerce platform for account holders providing 24/7 access to ordering, live pricing and stock levels.
• Drypower
• ENEPOWER
• Battery Fighter
• MI The Master Series

Products and services

• Drypower Batteries

Quantifiable outcome

• Over 8,000 portable and micro power product lines stocked
• +3 more outcomes

Named customers23 records

Segments6 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

19 partnerships are on record, tiered core and minor.

• FroniuscoreChannel Partner/ Reseller/ Distributor · 1 January 2026Official Fronius Special Partner appointed in 2026 to expand renewable energy portfolio. Products include Primo, Symo, Verto, and Tauro inverters with 5+5 year warranty (5 years from Installation Date plus 5 years if registered with Solarweb).
• VoltgocoreChannel Partner/ Reseller/ Distributor · 1 January 2024Australian Distributor for Voltgo range of LiFePO4 RV and Marine batteries since 2024. Voltgo was the first battery of this type in Australia to incorporate fire suppression inside the battery case. VLRV5120C 51.2V 100Ah module offered.
• SAFTcoreChannel Partner/ Reseller/ Distributor · 1 January 2024Expanded relationship with SAFT (French battery manufacturer) in 2024 as the ONLY Authorised Australian Distributor for Connected Smart Energy (CSE) products including 3V and 3.6V Lithium Primary cells and rechargeable Lithium Ion ranges.
• NOARK (Subsidiary of Chint Global)coreChannel Partner/ Reseller/ Distributor · 1 January 2024Distribution agreements signed in 2024 for NOARK single-phase (Sion) and three-phase (Trinix) hybrid inverter ranges. Also distributes NOARK Miniature Circuit Breakers and Moulded Case Circuit Breaker ranges.
• Delta-Q TechnologiescoreChannel Partner/ Reseller/ Distributor · 1 January 2023Australian Wholesale Distributor for Delta-Q Technologies industrial Lead Acid and Lithium Ion battery chargers since 2023. Products carry 2-year warranty from Retail Sale Date.
• SunmanminorChannel Partner/ Reseller/ Distributor · 1 January 2023Australian Wholesale Distributor since 2023 for the Sunman range of eARC mobile off-grid solar products including vehicle/vessel and integrated PV range. Products carry 5-year warranty.
• WakespeedminorChannel Partner/ Reseller/ Distributor · 1 January 2023Australian Wholesale Distributor since 2023 for Wakespeed range of smart DC charging systems. The WS500 alternator regulator delivers advanced alternator regulation for marine and vehicle applications.
• MG Energy SystemscoreChannel Partner/ Reseller/ Distributor · 1 January 2020Oceania Distributor for MG Energy Systems since 2020. MG Energy provides large rechargeable lithium kWh energy storage and motive power solutions for industrial markets.
• Pylon Technologies Co., LtdcoreChannel Partner/ Reseller/ Distributor · 1 January 2020Distribution Agreement signed in 2020 for Rack and Wall Mounted LiFePO4 Energy Storage Solutions for Industrial Markets. Products include US Series, Force L & H, PowerCube, UP2500, RV12100, and RT12100G31 modules with warranty ranging from 3-10 years.
• Power Long Battery (PLB)coreStrategic or Co-development Partner · 1 January 2019Strategic alliance built with Lithium Iron Phosphate manufacturer Power Long Battery (PLB) in 2019 for LiFePO4 battery solutions.
• Victron Energy B.V.coreChannel Partner/ Reseller/ Distributor · 1 January 2017Master Distributor for Victron Energy across Oceania region since 2017. Victron provides inverter chargers, solar charge controllers, lithium batteries, and related power electronics. Master Instruments holds extensive Victron inventory and provides technical support.
• FANSO (EVE Group subsidiary)coreChannel Partner/ Reseller/ Distributor · 1 January 2017Oceania Distribution agreement initiated in 2017 for Primary Lithium (LiSOCl2 and LiMnO2) products. FANSO is owned by EVE Group, a major lithium battery manufacturer.
• FDK/FujitsucoreChannel Partner/ Reseller/ Distributor · 1 January 2010Oceania Distributor agreement signed in 2010 after Sanyo divested NiMH and Lithium plants due to Panasonic takeover of Sanyo.
• SGScoreImplementation/ SI/ Consulting PartnerUN38.3 Testing and Certification services provided through SGS. SGS conducts battery safety testing according to IEC 62133 Standard and environmental conditions testing for batteries according to project needs.
• SAI GlobalcoreImplementation/ SI/ Consulting PartnerISO 9001:2015 certification issued by SAI Global under certificate QEC24093, valid until 31 May 2027.
• EnvirostreamcoreOthersAustralia's first onshore company to offer mixed-battery recycling. ISO 14001 accredited processing system recovers approximately 95% of materials in spent batteries. Master Instruments uses Envirostream for safe recycling and disposal.
• EcobattcoreOthersAustralia's leading battery recycling company with state-of-the-art facility at Campbellfield, Victoria. Master Instruments uses Ecobatt for safe recycling and disposal of batteries.
• Arbin InstrumentscoreTechnology or IntegrationPurchase and installation of Arbin Instruments battery test equipment for NSW and WA branches in 2023. Provides Laboratory Battery Testing (LBT) series hardware with industry-leading high-precision measurements and high-frequency data sampling for R&D support.
• CadexcoreTechnology or IntegrationPartnership with Cadex for battery maintenance and analysis equipment. Cadex analysers and chargers offered as part of product range. Products carry 2-year warranty with extended warranties available.

Scale indicators6 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• EnerSys: Global industrial battery manufacturer with broad portfolio across motive power, reserve power and aerospace/defence. A larger incumbent competing against Master Instruments' Drypower and custom OEM offerings in industrial and defence segments.
• GS Yuasa: Japanese battery manufacturer with a long-standing Australian subsidiary serving automotive, industrial and specialty battery markets. Competes against Master Instruments' automotive (Subaru, Ducati) and industrial battery product lines in Oceania.
• VARTA: German battery manufacturer with broad consumer, industrial and micro-mobility product lines distributed globally including Australia. Larger incumbent competing across multiple chemistries and applications where Master Instruments also operates.
• East Penn Manufacturing: Privately held US manufacturer of lead-acid and lithium batteries under Deka and other brands. Comparable as a family-controlled specialty battery manufacturer with proprietary brands and broad industrial/automotive distribution.

Direct peers

• Cell-Con: US custom battery pack assembler for OEM customers requiring small-to-medium volume production. Closely analogous business model to Master Instruments' custom battery pack assembly and turn-key service offering.
• Inventus Power: US designer and manufacturer of custom battery packs, chargers and power solutions for medical, industrial and military OEMs. Comparable mix of proprietary battery pack engineering and OEM-grade customer engagement that mirrors Master Instruments' custom pack franchise.
• Ultralife Corporation: Specialty battery and power products manufacturer serving defence, medical, industrial and government customers globally. Directly comparable in market focus areas (defence, medical, industrial) and breadth of chemistries (primary lithium, rechargeable, custom packs).
• Epec Engineered Technologies: US-based custom battery pack designer and manufacturer serving OEM customers in medical, industrial, military and robotics. Most directly comparable to Master Instruments on the proprietary custom pack assembly and OEM-focused engineering business model.
• Power-Sonic Corporation: Global sealed lead-acid and lithium battery manufacturer with branded product lines sold through distribution. Comparable product breadth across chemistries and global distributor-led go-to-market similar to Master Instruments' 8,000+ product range.

Regional players

• Battery World: Australia's largest battery retail franchise network and one of Master Instruments' wholesale customers. Comparable in Australian battery retail depth but operates downstream of Master Instruments rather than as a competing manufacturer/distributor.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@masterinstruments_1942
• Facebookfacebook.com/mi.battery.experts
• Instagraminstagram.com/masterinstruments_1942
• LinkedInlinkedin.com/company/master-instruments

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles20 records

Subsidiaries3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Master Instruments