Field guides6 free
Protocol guides
Field-oriented protocol and site guides. Green Free guides open without an account; Solo unlocks the rest.
Metering & payment stack
FreeOpen →Split energy path from money path when Authorize, PED, or kWh numbers disagree.
Liquid cooling loops
FreeOpen →Bleed airlocks, find leaks, and prove flow before you condemn cooled cables.
NACS field notes
FreeOpen →Triage native NACS ports, adapters, and thermal derates without guessing the path.
Site power quality basics
FreeOpen →Separate undervoltage, phase loss, and breaker trips from fake EVSE failures.
CCS handshake basics
FreeOpen →Find where SLAC, CableCheck, PreCharge, or CurrentDemand dies, then branch.
OCPP Faulted triage map
FreeOpen →Walk StatusNotification Faulted to the right subsystem before you open the cabinet.
ISO 15118 / PnC field notes
Solo+Stage TLS, contract, and renegotiation failures; fall back to EIM when needed.
Fleet CMS triage map
Solo+Matrix vehicle, stall, and credential before blaming depot hardware.
BESS safety framing for EVSE techs
Solo+Know which inhibits EVSE techs can check and what stays with BESS and fire vendors.
CHAdeMO legacy triage
Solo+Isolate CHAdeMO lock and CAN faults on dual-standard cabinets, and know when to retire.