Description
Penetrating concrete walls and long distances without signal dropouts.
SAJ eSolar Wireless-Pro Meter is a dual-channel smart energy meter with long-range sub-GHz LoRa wireless communication, engineered to transmit real-time grid and solar power telemetry over hundreds of meters through thick concrete walls with zero communication wiring.
Long-Range LoRa Wireless Transmission
Transmits telemetry across up to 1,000 meters in open space, penetrating reinforced concrete floors and masonry without cable runs.
Eliminates Hardwired RS485 Cable Pulling
Saves thousands of euros in drilling, trenching, and conduit routing between distant utility meters and garage inverters.
Dual-Channel Split-Core Measurement
Measures incoming utility grid power and solar PV generation simultaneously on two separate channels.
Dynamic Zero-Export & Solar Optimization
Delivers real-time power data to SAJ hybrid inverters to modulate battery charging and prevent grid injection.
More product details
Wi-Fi meters fail to reach distant property-boundary meter boxes through concrete foundations. The eSolar Wireless-Pro Meter utilizes low-frequency 868 MHz / 433 MHz LoRa radio waves.
- Sub-GHz radio frequency easily traverses multiple solid brick, concrete, and stone residential walls.
- Point-to-point wireless transmission range exceeds 1,000 meters in open space (up to 200+ meters in complex indoor structures).
- Encrypted RF protocol prevents cross-talk and interference with neighbor home automation systems.
Simultaneous grid tie and solar inverter power tracking.
Supporting dynamic export limitation and AC-coupled storage retrofits requires capturing both net grid flow and exact solar generation. Dual-channel inputs interface with split-core current transformers for non-invasive clamp-on installation. Class 1.0 active energy measurement precision across wide dynamic domestic load profiles. Broadcasts continuous power updates to SAJ hybrid inverters to maintain strict zero-export limits.
Pairs with single-phase and three-phase EK90 HS5 inverters
The meter links directly to single-phase (5 to 10 kW) and three-phase (8 to 20 kW) EK90 units. Telemetry feeds inverter energy management algorithms without third-party gateways.
Includes wired RS485 terminals for installation fallback
Standard RS485 ports remain on the chassis. Installers switch to wired serial communication if extreme structural shielding requires it.
Runs automated CT phase diagnosis in the elekeeper app
The elekeeper mobile app detects and auto-adjusts reversed CT clamp orientations. Commissioning completes with automatic phase verification.
Technical data
Zero-conduit wireless energy telemetry engineered for distant meter cabinets and historic buildings.
Dual-channel wireless smart meter with long-range LoRa link for cable-free installation.
Purpose-built to eliminate long, difficult RS485 communication cable runs between the main street meter and the inverter, the eSolar Wireless-Pro Meter uses sub-GHz LoRa wireless technology. It reliably transmits real-time grid import and solar power telemetry over hundreds of meters through thick concrete walls and outdoor distances, enabling dynamic zero-export control without drilling through customer walls.
- Sub-GHz Link
- LoRa Wireless
- Range Capability
- 1,000 m
- Dual-Channel
- 2x Split CTs
- Communication Cabling
- Zero
Key data (as published)
- Type
- Dual-channel wireless smart meter for the EK90 HS5 system
- Radio link
- LoRa (inverter-side built-in LoRa module with ANT antenna port)
- Optimal wireless range
- 150 m, including wall penetration
- Function
- Grid import/export sensing, load monitoring, export limitation / zero-export interaction with the inverter
- Commissioning
- One-Click Self-diagnosis with meter & CT phase auto-adjustment in the elekeeper App
- Compatibility
- EK90 HS5 single-phase (5–10 kW) and three-phase (8–20 kW) systemswired RS485 meter connection remains available as an alternative
Installation & control path
- Data cable to inverter
- Not required when the LoRa link is used
- Inverter endpoint
- Built-in EK90 LoRa module with ANT antenna port
- Wired fallback
- Supported through the EK90 wired RS485 meter connection
- Grid measurement
- Import and export at the connection point
- Export-control use
- Zero-export / export-limit interaction with the inverter
- App workflow
- elekeeper One-Click Self-diagnosis and CT phase auto-adjustment
Project fit
Where this model fits.
Scenarios that show which projects the SAJ eSolar Wireless-pro Meter (dual-channel LoRa smart meter) belongs in, what to verify before quoting, and when another model is the better pick.
Distant Boundary Meter Boxes, Detached Garages & Historic Buildings
Properties where the main electrical utility meter is located at the street boundary, in a separate basement, or across finished courtyards where running RS485 cable is structurally impossible or cost-prohibitive.
Mounts in the main meter panel and transmits power data wirelessly to the inverter in the garage or attic, saving €500. €1,500 in electrical trenching and drywall repair.
- Confirm this model against the adjacent rating in the same family
Documents
SAJ EK90 HS5 (5K-10K) S3/S4 User Manual (EN)Product questions
Does this wireless meter require a separate receiver module at the inverter?
Yes. A matched LoRa wireless USB transceiver plugs into the inverter. The meter communicates directly with a compact LoRa wireless receiver dongle that plugs into the SAJ inverter’s communication port, automatically establishing a paired point-to-point wireless data link upon power-up.