Technical guides about OCPP, CPO operations, smart charging and e-mobility.
Why does a car charge at 150 kW one minute and 40 kW the next? The charging curve explained: constant current and constant voltage, state of charge, temperature, peak vs average power, and what the curve means for charge point operators.
Read more →How long does an EV take to charge? A simple formula, charging time tables for AC and DC chargers and common battery sizes, and the factors that make real sessions faster or slower, from on-board chargers to cold weather.
Read more →kW and kWh are the two numbers behind every charging session, and mixing them up causes confusion about speed, battery size and price. A clear explanation with examples, formulas and how both appear in OCPP meter data.
Read more →IEC 61851 defines four charging modes, from a household socket to DC fast charging, and the control pilot signal that lets car and charger agree on current. Learn the modes, pilot states A to F, PWM current signalling and how it all appears in OCPP.
Read more →GB/T is China's national EV charging standard and one of the most widely used in the world. Learn how its AC and DC connectors work, how communication differs from CCS, what ChaoJi is, and when operators outside China need GB/T.
Read more →NACS, standardised as SAE J3400, is becoming the main charging connector in North America. Learn its history, technical ratings, how it relates to CCS1 and ISO 15118, adapters, and what charge point operators should install.
Read more →CCS and CHAdeMO are the two classic DC fast-charging standards. Compare connector design, communication, power, vehicle support and bidirectional charging, and decide whether your new chargers still need a CHAdeMO cable.
Read more →A clear guide to EV charging connector types worldwide: Type 1, Type 2, CCS1, CCS2, CHAdeMO, NACS (SAE J3400), GB/T and MCS. Where each is used, AC or DC, typical power and what operators should install.
Read more →OCPP and OCPI sound alike but solve different problems. OCPP connects chargers to their management system; OCPI connects charging companies to each other for roaming. See the differences, how they combine in one session and what your platform needs.
Read more →OCPI (Open Charge Point Interface) lets charging networks and e-mobility providers share locations, tariffs, sessions and billing data. Learn how it works, its main modules, versions and how to get started with OCPI roaming.
Read more →What is the difference between a charge point operator (CPO) and an e-mobility service provider (eMSP)? How each earns money, how they work together through roaming, and which role suits your business.
Read more →Location decides most of a charging site's success. Learn the criteria that matter, from traffic and dwell time to grid capacity and lease terms, plus a simple scoring model to compare candidate sites objectively.
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