2022_05 SAM_EN | 01 5
2 SAM product description
SAM is the memory and display module that permanently stores the start and final meter reading of the charging
processes and displays them on request.
Angaben zum Produkt
2.1 Product information
SAM, in combination with a verified meter, fulfils the possible requirements of the local calibration law when
charging an electric vehicle at a charging station.
The unit offers advantages for several market participants:
User:
• Verified billing of kWh and charging time
• SAM is visible to the user at the charging point from the outside and enables a comparison of the meter
values on site and on the bill
• Checking of the meter values by the user is possible without additional devices (e.g. computer, internet
access, etc.)
• - The displayed values are binding in case of dispute
Charging station operator:
• Significant reduction of complexity in the system compared to alternative solutions ("keep it simple")
• - SAM is a cross-market solution: It is roaming-capable from the start and offers independence from
CPO, MSP, backend
• No additional technical requirements for the CPO backend system and downstream data transfer (e.g.
communication, storage, transparency software, etc.)
• OCPP 1.5 ff can be used unchanged, no transmission of signed meter values is required
• - All data relevant to the bill is transferred to the backend via OCPP and is available to all market
participants
• One-off costs for procurement - no running costs
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