Can LGF-PA66 and EC32 RTU provide solar-powered remote metering where irrigation pipelines have no mains electricity?

Most irrigation pipe metering points sit out in the fields with no mains power and no wired network. The LGF-PA66 draws very little power, and together with the low-power mode of the Hero V9 EC32 RTU and a solar supply it becomes a fully off-grid remote metering terminal that reports over 4G or NB-IoT.

System layout: the solar panel charges the battery through the EC32 RTU's built-in charge controller, and the RTU samples the LGF-PA66's 4-20 mA or RS485 (Modbus RTU) signals at a set interval, uploading instantaneous and totalized flow. Size the panel and battery from local solar irradiance and the longest expected run of overcast days; for off-grid sites choose a low-power RTU such as the EC32. Keep the controller and battery in a weatherproof enclosure and use low-temperature batteries in northern winters.

Installation notes:

• Check 4G coverage at the site first; in weak-signal areas switch to NB-IoT or fit an external antenna.
• The LGF-PA66 sensor and converter are both IP68-rated, so the meter can live in a field valve pit — just seal the cable gland properly.
• Accuracy matches mains-powered sites: ±0.5%（DN50-100） of reading, with the platform comparing daily totals and alarming on missing reports.

The same arrangement suits volumetric water charging, water-rights trading and irrigation fee billing — no site visits for meter reading. For more information, please visit our product page or contact our technical team.