Deye SUN-20K-SG05LP3-EU-SM2 Hybrid Inverter, 3-Phase, 20kW, LV

The Deye SUN-20K-SG05LP3-EU-SM2 is a 20kW three-phase hybrid inverter for 48V low-voltage battery systems, built for larger homes, farms and small commercial sites on a three-phase supply.

It takes up to 40kW of PV across two MPP trackers with two strings each, and charges and discharges a 48V battery bank at up to 350A. Grid, PV, battery and generator are all managed by the one unit, with six programmable time periods for charging and discharging so the system can follow a tariff or a load profile. The battery side is transformer-isolated, the enclosure is rated IP65, and the output is 100% unbalanced, so each phase can deliver up to half of the rated power on its own.

Why installers pick this unit

• 20kW three-phase output (22kVA maximum), with a 70A continuous grid-to-load passthrough
• Two MPP trackers, two strings each, 36A per tracker for modern high-current panels; 40kW maximum PV access
• 350A battery charge and discharge, self-adapting to the battery BMS, with two battery inputs
• Parallels up to 10 units on- and off-grid, with multiple battery banks
• AC coupling to retrofit an existing grid-tied PV array, plus generator support
• 97.6% peak efficiency (97.0% Euro); WiFi, RS485 and CAN comms; NRS 097 is among the listed grid codes

Good to know before you quote it

• Low-voltage (40-60V) batteries only. For high-voltage battery stacks use the Deye HV three-phase range.
• Maximum PV input voltage is 800V (MPPT range 160-650V). Size strings for the coldest site temperature.
• Warranty is 5 years, or up to 10 years depending on the installation country. Confirm against Deye's warranty policy for the site.