Solplanet ASW08kH-T38kW three-phase high-voltage hybrid inverter, 3 MPPT

Overview

The ASW08kH-T3 is an 8kW three-phase hybrid with three independent MPP trackers of 16A each, useful when the array is split across three roof faces. Up to 12kWp of PV can be connected with a 200–950V tracking range (250–850V at full power). The high-voltage battery port works from 120 to 600V at up to 8kW and 30A, and the EPS output supplies 8kVA continuously with 16kVA for 10 seconds. The datasheet gives 98.0% maximum efficiency; the inverter weighs 26kg.

• 5–12kW (H-T2, 2 MPPT) and 8–12kW (H-T3, 3 MPPT)
• Up to 150% PV oversizing, 1100V max. DC input
• 120–600V battery input, 30A charge and discharge
• EPS backup output with switch-over under 10ms
• Parallel operation on grid and backup side
• IP66 enclosure, natural convection, below 35dB

How it works

The H-T2 and H-T3 are transformerless three-phase hybrids that share PV power between loads, a high-voltage LFP battery and the grid. The H-T2 has two MPP trackers rated 20A each and the H-T3 three trackers of 16A, all with a 1100V maximum input, 630V rated voltage and 180V start-up voltage. The PV array may reach 150% of the AC rating, for example 15kWp on a 10kW unit, with a 10kW limit per tracker on the 8–12kW models.

The battery port accepts 120–600V and charges or discharges at up to 30A, with charge and discharge power equal to the inverter rating. Power drawn from the grid can reach twice the rated output. Self-consumption, reserve, time-of-use, custom and off-grid modes in the app decide when energy is stored, used or kept for outages.

Backup and parallel operation

Standard models have an EPS port that keeps selected circuits supplied during a grid failure, switching in less than 10ms. Off-grid, the EPS output delivers the rated power continuously, one third per phase, and twice the rated power for up to 10 seconds. The -O versions have no EPS port. Inverters of the same model can run in parallel on the grid side only, or on both grid and EPS side with the battery connected to the master unit.

Installation and compatibility

Mount the inverter vertically on a solid wall able to carry four times its weight (24.5kg for H-T2, 26kg for H-T3), out of direct sunlight; Solplanet recommends ambient temperatures below 40°C. Export control uses the three external current transformers supplied, or an AISWEI-approved smart meter. A parallel system shares one SDM630 Modbus V2 or SDM630MCT V2 meter on the master unit. Asymmetrical output, which follows unbalanced loads phase by phase, is available on units built from August 2024.

Approved batteries include the Solplanet Ai-HB G2, G2 Pro, G2-E, AP-H and Ai-HB 2.56LG, plus listed Pylontech, BYD, Dyness, Lithium Valley and FEB models (compatibility list v1.10). Solplanet publishes a CEI 0-21 certificate for the inverters with Ai-HB G2 batteries, a VDE-AR-N 4105 certificate and an EN 50549-1 certificate covering all H-T2 and H-T3 models.

Monitoring and settings

An Ai-Dongle with Wi-Fi (2.4GHz) and LAN is supplied, and commissioning, parallel setup and AFCI activation are done in the Solplanet App. The inverter also offers RS485 with Modbus RTU and, on units built from April 2025, Modbus TCP over LAN, plus the CAN BMS port, an RS485 meter port, two dry-contact outputs and four inputs. AFCI, available from April 2025, runs a self-test every 24 hours and can reconnect automatically after five minutes.

Questions and answers