Solar Pump 20-32S 120V 170A Off Grid BMS JNFN ANT 32ZPB Modbus RTU Pack

• 120 V Ceiling across 20 to 32 Series: One board covers 24 V to 120 V string configurations, which lets a builder standardise on a single part number across a pumping portfolio instead of carrying four.
• Modbus RTU with Documented Register Map: Cell voltages, temperature, current, state of charge and alarm words sit in a published register block, so a pump drive or a PLC can be programmed against the document rather than by trial and error.
• Three-Stage Under-Voltage Strategy: Warning, derating and cutoff thresholds each carry an independent delay, which keeps the pump running at reduced speed through a passing cloud instead of stopping and waiting for a manual restart.
• Wide Temperature Operation: The board is specified from -25 °C to +60 °C, with charge current progressively limited below 0 °C and balancing suspended at the extremes, because a field cabinet is never at room temperature.
• Dust and Spray Sealed: IP65 enclosure with a gasketed lid and coated control section; the terminal block accepts field wiring without opening the sealed compartment.
• Surge-Tolerant Inputs: Sense and communication lines are protected against the transients that arrive on long field cabling, a failure mode that quietly destroys unprotected boards during the first storm season.
• Optional Remote Telemetry: A 4G module can report daily energy throughput, fault history and pack state to a dashboard, which turns a two-hour drive into a remote check.

Agricultural and livestock water pumping is the core use case, whether the array drives a surface pump through a VFD or a submersible through a dedicated solar drive. The same board suits remote irrigation nodes, rural water supply stations and livestock watering points where the pack buffers a variable source.

Off-grid cabins and remote monitoring stations that run 96 V to 120 V strings can use the identical board, since the under-voltage staging and wide temperature range are equally relevant to a load that must not drop out overnight.

Delivery includes the sealed board, a potted NTC set, a field wiring terminal kit and a printed register reference; the full Modbus table is issued as a spreadsheet. Boards are soak tested across the temperature range before packing.