Solis S5-EH1P3K-L3kW single-phase hybrid inverter for 48V batteries, 2 MPPT

Overview

The S5-EH1P3K-L is the entry model of the Solis S5-EH1P-L single-phase hybrid series, rated at 3kW grid output and 3.3kVA apparent power. It is built for 48V lithium or lead-acid batteries (42–58V, 50–2000Ah) and charges or discharges them at up to 3kW and 62.5A. Two MPP trackers of 15A accept PV strings up to 600V; Solis recommends up to 6kW of modules, of which 4.8kW is usable. The backup port supplies 3kW, or 4.5kVA for 10 seconds, and the fanless IP65 housing weighs under 18kg.

• 3 to 6kW single-phase, 220/230V
• 48V battery (42–58V), lithium or lead-acid
• 2 MPPT, 600V max. PV input
• Backup output, switch-over under 20ms
• Natural convection, IP65, 18.3kg
• Integrated AFCI and DC/AC type II surge protection (6kW)

How it works

The S5-EH1P-L series is a single-phase hybrid inverter for residential systems with low-voltage batteries. PV power from two MPP trackers supplies household loads, charges a 42–58V lithium or lead-acid battery bank of 50Ah to 2000Ah and exports the surplus. The battery side is isolated by a high-frequency stage. A separate backup port supplies selected circuits when the grid fails, switching over in under 20ms.

Four storage modes are available: self-use, feed-in priority, backup and off-grid. Time-of-use charge and discharge windows can be set in self-use mode. The PV input accepts up to 600V, starts at 120V and tracks from 90V to 520V with 15A per tracker.

Installation and compatibility

The inverter weighs 18.3kg and is cooled by natural convection. It is wall-mounted vertically, with at least 300mm between inverters or objects and 500mm from the bottom of the unit to the ground. If the battery has no built-in DC breaker, an external battery switch of at least 80A (3–3.6kW) or 125A (4.6–6kW) is required. Solis specifies a 40A AC protection device for the 6kW model.

An Eastron single-phase meter with CT, CAN and RS485 cables are supplied, and a battery temperature sensor is used with lead-acid batteries. The series does not support parallel operation, and the backup port must never be connected to the grid. Approved lithium batteries, such as BYD Battery-Box Premium LVS/LVL, Dyness and LG RESU, are on the Solis matching list.

Monitoring and grid codes

Settings are made on the 7in colour LCD with four keys. RS485 is standard and Wi-Fi or GPRS data loggers connect the inverter to SolisCloud for remote monitoring. A DRM port is provided where demand response is required. Listed grid codes include CEI 0-21, VDE-AR-N 4105/VDE V 0124, EN 50549-1, C10/11, TOR, G98/G99 and RD 1699. Solis notes that the 5kW and 6kW models are not available in Germany.

Questions and answers