Huawei SUN2000-3KTL-L1 single-phase hybrid inverter, 3kW

The inverter is the part that translates the direct current produced by the panels into the alternating current used by the sockets and appliances in the house; without it, the energy from the roof cannot be consumed. This model is hybrid, that is it also knows how to work with a battery: during the day it sends the surplus into the battery, and in the evening it takes it back out into the house. It is single-phase, so it suits homes with an ordinary connection, on a single phase, and it cools itself, without fans, so it makes no noise and has no parts that could wear out.

The 3,000 W of continuous power cover the current consumption of a small house — fridge, lighting, usual household appliances — and on the panel side it accepts up to 4,500 Wp, that is an oversizing of about 1.5x relative to the AC power, useful on east-west roofs or with high-power modules. The two MPPT inputs allow two strings of panels with different orientations, each tracked separately. If you add a Huawei LUNA2000 battery, the inverter charges it with up to 5,000 W and discharges it with up to 3,300 W, without other equipment in between. With 12 kg and 365 x 375 x 156 mm it takes up as much wall space as a small hand suitcase, and the IP65 protection allows mounting outdoors as well, sheltered from direct rain; it requires no periodic maintenance, and the output is followed in the FusionSolar app.

3,000 W rated active power, 3,300 VA apparent, 15 A maximum output current on 220/230/240 V single-phase, THD below 3%, maximum efficiency 98.3% and weighted European 97.3%. DC side: 2 independent MPPT, maximum input voltage 600 V, MPPT operating range 90-560 V, 12.5 A per MPPT, recommended PV power maximum 4,500 Wp. Integrated battery interface 350-560 V DC, LUNA2000 compatible, 5,000 W on charge and 3,300 W on discharge; together with a back-up module it supplies the essential loads when the grid goes down. IP65 enclosure, natural convection cooling, 12 kg, 365 x 375 x 156 mm; RS485 communication and Smart Dongle WLAN/Ethernet or 4G.

Who it suits

Suitable for a house with a single-phase connection and a system of up to about 4.5 kWp, which wants self-consumption now and, possibly, a battery added later.

Terms explained

• MPPT: The circuit that permanently looks for the point at which the string of panels gives the most power; two MPPT mean that two strings with different orientations can be optimised separately.
• Hybrid inverter: An inverter that can also work with a battery, not only with panels and grid: it charges the battery during the day and discharges it in the evening.
• IP65: The protection code of the enclosure: dust-tight and resistant to water jets, so the unit can also stay outdoors.

Technical specifications

Recommended applications

• Single-phase residential photovoltaic systems of up to ~4.5 kWp
• Self-consumption installations with storage in Huawei LUNA2000 batteries
• Battery retrofit on homes with a single-phase connection
• Systems with backup supply of the essential loads (together with a back-up module)

Warranty

10 years product warranty (Huawei standard for the European market)

Technical details

Specifications confirmed from the manufacturer's datasheet

SUN2000-3KTL-L1 is a single-phase Smart Energy Controller from Huawei's residential L1 series, with a rated AC power of 3,000 W and a maximum apparent power of 3,300 VA. It works on a 220/230/240 V AC grid and reaches a maximum efficiency of 98.3%, respectively 97.3% weighted European efficiency, with a total harmonic distortion below 3%.

On the DC side it has two independent MPPT trackers, a maximum input voltage of 600 V and an MPPT operating range of 90-560 V, with 12.5 A maximum current on each MPPT. The recommended photovoltaic power is up to 4,500 Wp, which allows an oversizing of about 1.5x relative to the AC power - useful for east-west orientations or high-power modules.

The inverter has an integrated battery interface (350-560 V DC), with a maximum charging power of 5,000 W and a maximum discharging power of 3,300 W, being compatible with the Huawei LUNA2000 storage systems. It can thus work both as an on-grid inverter for self-consumption and as a hybrid inverter with storage, and together with a back-up module it can supply essential loads when the grid goes down.

Structurally it is a compact unit of 12 kg (365 x 375 x 156 mm), with an IP65 protection rating and natural convection cooling, without fans - so without noise and without moving parts that could wear out. Monitoring is done through RS485 and through a Smart Dongle WLAN/Ethernet or 4G, in the FusionSolar app.