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Comparisons & buying guides
11 straight comparisons for people specifying metering and EV charging. Written to answer the question, including where the answer is not our product.
Specifying metering
The decisions that come up before anyone has chosen a manufacturer.
Accuracy class — 0.5S vs 1 vs 2
What the class means, why the S matters more than the number, and which one your application actually needs.
Read the comparison →Sub-meter vs check meter vs revenue meter
Three terms used interchangeably for three different things. Which you need, and who owns it.
Read the comparison →Split-core vs solid-core CTs
Retrofit without a shutdown, or lower cost in a new panel — and where split-core installations go wrong.
Read the comparison →BTU meter types for chilled water
Mechanical, ultrasonic or electromagnetic — turndown, pressure drop and what survives a billing dispute.
Read the comparison →Integration
Getting data out of the hardware and into your systems.
EV charging
Specifying chargers for a site, a fleet or a tender.
AC vs DC charging
Decide by dwell time, not by charging speed — including an honest view of when DC is the only answer.
Read the comparison →OCPP 1.6J vs OCPP 2.0.1
What changes between versions, and why this is a hardware decision rather than a setting.
Read the comparison →Indian AC EV charger manufacturers
How Tech OVN chargers compare on metering quality, commercial terms and servicing model.
Read the comparison →Our products in context
Where our hardware sits against the alternatives.
Still deciding?
Tell us the application and we'll tell you what to specify — including when the right answer isn't something we sell.