Weco TH 40kW40kW three-phase high-voltage hybrid inverter, 4 MPPT

Overview

The TH 40kW is a commercial three-phase hybrid inverter with 40kW rated and 44kVA apparent power. Four MPP trackers, two strings each at 36A, accept up to 80kW of PV. Battery current is 80A per input or 160A on one input with WeCo high-voltage LFP storage. The backup output supplies 40kW, or 60kVA for 10 seconds, and grid bypass reaches 120A.

• 25–60kW, 400V three-phase
• 4 MPPT, 36A per tracker, 1000V max.
• Battery 135–1000V, 80A per input or 160A
• Up to 100kW PV on 50 and 60kW
• Backup with 150% for 10s
• 98.5% max. efficiency, IP65

How it works

The TH 25–60kW series brings hybrid storage to commercial three-phase sites. Four MPP trackers with two strings each accept 36A per tracker and 55A short-circuit current, operating from 140 to 850V with 1000V maximum input and 160V start-up. PV array power is up to 50kW on the 25kW model, 60kW on the 29 and 30kW, 80kW on the 40kW and 100kW on the 49, 50 and 60kW models.

The battery side works with WeCo LFP batteries between 135 and 1000V, derating above 950V, and supplies 80A per battery input or 160A on a single input. The backup output carries rated power on 400V three-phase with 150% apparent power for 10 seconds and a switchover time of 10ms or less. Grid bypass is 76A on the 25kW, 91A on the 29 and 30kW and 120A from 40kW.

Key features

Efficiency is 98.5% maximum and 98% European, with 99.9% MPPT efficiency. Protection includes PV isolator, string and battery reverse polarity protection, all-pole residual current monitoring, anti-islanding and AC overcurrent, short-circuit and overvoltage protection, with overvoltage category III on AC and II on DC. Power control and zero-export control are integrated, and standby consumption on-grid is below 35W.

Installation and compatibility

The inverter is wall-mounted, weighs 80kg and measures 825×795×327mm, so it needs a wall and fixings rated for that load. The enclosure is IP65 with smart forced-air cooling, operating from −25 to +60°C and up to 4000m with derating above 3000m, and noise below 50dB(A). Communication uses CAN to the battery BMS, RS485 to the meter and a Wi-Fi stick for the portal. Listed standards are EN 62109-1/-2, EN 62477-1 and IEC 61000-6-1 to -4.

Monitoring and settings

The Wi-Fi stick and WeCo's NooR app provide remote monitoring and settings, with LED status on the unit. The inverter warranty is five years, extendable to ten when a WeCo lithium storage system is connected and the product is registered on WeCo's platform.

Questions and answers