The Growatt SPM is a single-phase smart meter for accurate measurement of energy consumption and export limitation. With Class 1 accuracy and LCD display, it measures voltage, current and power in 1P2W networks. Compatible with Growatt storage and solar inverters for self-consumption optimization. DIN-rail mounting, with RS485 communication for online monitoring. An essential tool for solar panel wholesalers for efficient systems, weighing 223 g and compact design. Operates at 50/60 Hz and offers 30 days of data storage. 2-year warranty.