Battery testers and power quality

Power You Can Trust

Keep your critical systems running with confidence. Megger’s advanced battery testers and power quality analysers help you prevent downtime, verify system integrity, and stay ahead of faults. From ensuring backup batteries are ready when needed to detecting hidden power quality issues before they cause damage, our tools deliver accurate, actionable data. Built for ease of use and designed to meet industry standards, Megger solutions support safer, smarter, and more reliable electrical infrastructure.

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Built for the job at hand:

Ensure safe operation with a sound and solid battery maintenance program. Our innovative testing solutions streamline commissioning procedures, allowing for smooth installation of standby batteries.

Make data-driven decisions:

From high voltage and harmonics to transients and power reversals, you’ve got a lot to look out for. With Megger, you can detect issues before they become problems. Our digital battery analyzers provide in-depth insights into the health of your assets — pinpointing faults promptly and accurately — so you can safeguard your operations from unexpected disruptions.

Reliability you can depend on:

Rather than succumb to rising replacement battery costs or rely on backup systems, our instrumentation and software systems can measure, trend, and manage the life cycle of cells in a cost-effective manner. And there’s no need to take the battery offline for testing, thanks to our online capabilities and highly repeatable instruments.

Take safer measures:

Our battery discharge testers meet regulations and requirements, and exceed your expectations, preventing compliance-related setbacks and ensuring safe operations. Plus, you’ll benefit from extended product lifespans that improve your asset management program’s ROI.

How often should impedance readings be taken?

The frequency of impedance readings varies with battery type, site conditions, and previous maintenance practices. IEEE Recommended Practices suggest semi-annual tests. With that said, Megger recommends that VRLA batteries are measured quarterly due to their unpredictable nature and semi-annually for NiCd and flooded lead-acid.

Do battery manufacturers accept impedance for warranty purposes?

Many manufacturers now publish impedance values to establish baselines. Several larger organisations who buy many batteries per year have written percent increases of impedance into their battery purchasing specifications for warranty and replacement purposes.

Why perform impedance testing during a discharge test?

While performing a discharge test, IEEE requires you to measure the individual cell voltages multiple times throughout the test. Using the BITE5 to measure cell voltage gives you the advantage of measuring impedance at the same time. With the extra data gained from impedance testing, you will be able to see which cells are more susceptible to failure, even though they may not have reached their voltage limit during the test. Additionally, with the impedance data from fully charged cells and from cells throughout and at the end of the discharge test, you can develop baseline impedance data. With the baseline data, you will have pass/fail limits for future impedance tests on the tested battery bank, as well as its specific types of cells.