NFE metering strategy + Glen Street-EMS Authoritative page for NFE's role in the IEEE Smart Village meshEMS / Street-EMS initiative. Compiled 2026-08-10 from the Element room "Smart Village Energy Interest Group" (full history back to 2026-04-24), the ISV Dev Kit BOM sheet, isv.wiki, and the Rev B/C line diagrams. No customer PII or financial ledgers on this page by policy. What it is Not a standalone NFE product. It is NFE's seat in an IEEE Smart Village (ISV) open-source initiative called meshEMS , hardware-branded Street-EMS , started at an IEEE / NESL hackathon in April 2026. Hardware and firmware are led by Glenn Algie (10power.com / NESL); the software and standards side is led by Adam Sauer (ISV Tech Committee chair). The working venue is the Element/Matrix room "Smart Village Energy Interest Group". meshEMS is open-source firmware on an ESP32-S3 / ESP32-P4 module doing OpenAMI two-way metering and control over secure MQTT into OpenEMS . Deployed as a street-pole or pedestal low-voltage feeder cabinet that meters AND controls every tenant, it is designed to replace the per-tenant DIN-rail meters and the OpenEMS Raspberry Pi with a single integrated 9x15 cm EMS board. Three related code bases (grown by 10power.com with two grad EE engineers on a 90-day sprint): Street-EMS , BUILD-EMS , DTM-EMS . GitHub org: github.com/energy-iot ( ems-dev = Street-Pole EMS, nesl-meshems = the board, openami-smart-village , meshems-openami-metering ). How it fits NFE Today (pilot): CHINT DDSU666 smart meters plus a Raspberry Pi gateway over Modbus RTU / RS485, feeding OpenEMS. Current pedestal cabinet is roughly 80 x 60 x 25 cm, about USD 150 locally. Next generation: the Street-EMS cabinet folds the 3-phase meter, the per-tenant meters and the Pi into one EMS board plus an SSR bank, shrinking the cabinet (cheaper, fits indoor locations, easier to secure from theft and weather) and adding per-tenant remote control and local energy-policy automation. The cabinet (Rev C, 9-tenant, 3-phase LV feeder) Signal flow left to right: Incoming LV feeder L1/L2/L3 + N + PE. Each phase: a 63A main breaker (QF1/QF2/QF3), a mains-usage CT (CT4/CT10/CT16), then a UKK80 terminal block fanning out to up to 6 tenant ways per phase. Three Ivy RCMs (RCM1/2/3), one residual-current monitor per phase, for continuous leakage and neutral insight. Modbus UART to RS485 adaptor. Nine contactors K1..K9 (3 tenants per phase) for per-tenant remote connect/disconnect, each with a tenant-usage CT (CT1,2,3,7,8,9,13,14,15). Controller on the cabinet door: "Street-EMS w RGBW" = 3 stacked CircuitSetup 6-channel CT meters = 18 channels (9 tenant + 3 mains + 6 spare). Two 8-channel opto-isolated zero-crossing SSRs drive the 9 contactor coils (9 control lines, 3x3 per phase, 240 Vac sensitive). Backplate Power PCB: fused, TVS surge protected, 3x Myrra 44122 240-to-9 Vac, giving 5V 2A and 12V 1A. Legend (Rev B with legend): QF circuit breaker, CT current transformer, K contactor, UKK80 distribution terminal block, RCM residual current monitor, SSR solid-state relay, PCB printed circuit board, EVSE EV charger. 1P+N one phase plus neutral. RS485 / Modbus UART / I2C communications. Decisions ratified in the room (2026-07-25): 1P over 1P+N for tenant breakers and contactors (1P is cheaper; do not switch neutral except for EV). 80A over 63A rating, chosen to leave room for a future EV station at a new location later this year. Rev B to Rev C added the legend; the diagram is deemed complete with only a few unlabelled wires to clarify at the workshop. Still open: the make-before-break 80A neutral / phase-transfer balancer ("neutral rebalancer transfer method and apparatus") and the EVSE port are marked spare-room / in-progress. Firmware and energy-policy vision (Glenn) Local, IFTTT-style per-tenant automation in C/C++ on the ESP32, not just remote on/off: Triggers: prepaid-token expiry, over-voltage, over-current, over-kW, over-kWh, over-generation, over-storage. Actions: SSR disconnect (normally-closed contactor coil), SMS alert, RGBW LED or e-paper warning at the tenant box, a flash-warning cadence before cutoff, and a graceful post-sunset lighting-only allowance (about 10-20 W for a few hours from battery when storage allows). Policy model: each tenant has a JSON "mode" (safety vs prepaid-shutdown automations) stored in ESP32 SPIFFS or SD as a persistent energy-model cache. Grid insight: continuous per-phase leakage detection, neutral-imbalance alerts, phase-loss detection. Cloudless village An ESP32-P4 with its own Ethernet NIC acts as a per-feeder aggregation node. Street-EMS units LAN-hop along the feeder ("feeder hops") to run an in-village pay-go portal and full UX with no broadband. Optional LoRa / Meshtastic mesh and power-line communication on top; optional low-cost village camera / audio snapshots. Standards and interoperability (OpenAMI) OpenAMI is the "actionable energy telemetry" layer, the utility-facing layer above a village feeder. Built on DLMS/COSEM (IEC 62056), SunSpec Modbus/JSON, MQTT, IEEE 1547-2018 (DER interconnection) and IEEE 2030.5 (Smart Energy Profile). Village Metering goals: billing, remote disconnect, theft detection. EnAccess Foundation is extending the OpenAMI codeset. Reference: isv.wiki (repo github.com/overview-solutions/isv-ai-wiki , MIT). The workshop (immediate driver of the ISV Dev Kit BOM) IEEE ISV awarded Glenn and Adam a 4-session, 9-hour hands-on workshop (assemble an EMS in about 15 minutes each, assemble a cabinet, run code challenges). IEEE funds the parts BOM. Plan: build 15-20 EMS units and 3-5 multitenant cabinets for participants to take home (about USD 50 each). Parts pre-ship to Albert, the ISV lead in Nairobi (AliExpress China to Nairobi direct; small PCB parts hand-carried, PSUs prebuilt on site). BOM total about USD 2,377 per batch (see the ISV Dev Kit BOM sheet). Venues: PAC2026 Nairobi (September) and OSEAS Kigali, Rwanda (October, about EUR 50). NFE attendance (as of 2026-08-10): Dansturn and Dismas are going to Kenya (Nairobi). Aaron, now back in Uganda, could join them. Kigali remains a possibility. Glenn asked NFE to co-lead the cabinet builds. People and orgs Glenn Algie (10power.com / NESL / IEEE ISV, hardware + firmware; also WMAC.CLOUD New Zealand, REI Cameroon). Adam Sauer (ISV Tech Committee chair, meshems software + OpenAMI, runs isv.wiki). Aaron Tushabe, Hillary Arinda, Dansturn, Dismas (NFE). Albert (ISV Nairobi lead). Abiodun Okunola (ISV Africa regional lead). EnAccess Foundation, EPRI Open Source, NESL. Sources Element room "Smart Village Energy Interest Group" ( #smartvillage:matrix.nearlyfreeenergy.com ), full history from 2026-04-24. ISV Dev Kit BOM (Google Sheet 1AeAUrfL-Fu_j3xsBPjY555B0huxV0nnMtRjkDTFPjTE ). Line diagrams saved at NFE/smart village energy interest group/ (Rev B with legend, Rev C editable + PDF). isv.wiki; github.com/energy-iot . Open items Confirm the Rev C legend back to Glenn (he asked). Decide and mobilize the NFE workshop attendance (Nairobi confirmed for Dansturn + Dismas; Aaron + Kigali possible). Fill the detailed per-tenant "Behind the Meter" companion page.