Three-phase grid inverter GoodWe GW4000-SDT-20, 4 kW, NZÚ 2026

Product detailed description

The three-phase on-grid inverter GoodWe GW4000-SDT-20 with power of 4 kW belongs to the popular SDT G2 Plus+ series. It is characterized by high efficiency and intelligent control, which allows you to get the most out of your photovoltaic system.

Basic parameters

• Type of inverter: Three-phase grid-tied inverter (on-grid)
• Power: 4 kW, under suitable conditions it can deliver up to 10% more output than its rated value
• MPPT: 2 independent inputs
• Monitoring: 24-hour monitoring of consumption and load thanks to the GoodWe HK3000 system

Key features

• Input current of 16 A per MPPT – ready for modern panels with power above 400 W.
• Output power of 4 000 W with 110% overload capacity – peak AC power up to 4 400 W to cover energy peaks.
• 2× independent MPP trackers – minimizes losses when parts of the roof have different lighting or are partially shaded.
• Wide operating range of 180–850 V – the system starts almost immediately at dawn and extends the time of energy production.
• No fans – cooling is provided by a passive heatsink, noise remains permanently below 34 dB.
• Overvoltage protection type III – AC and DC side protection; type II available as optional accessory.
• PPDS P4 certification – the inverter is fully certified.

Suitability for the grant Nova zelena usporam Light

The inverter meets technical and legislative requirements of the Nova zelena usporam Light programme for subcategory C.3 – Photovoltaic system with water heating. Implementation companies can use it without worry as a basic component of an installation with grants of up to CZK 120,000.

In order for the entire photovoltaic system to be eligible for the grant, the installation must meet the following conditions:

• Three-phase connection and power: The programme requires a three-phase connection and a minimum installed power of photovoltaic modules of 3 kWp. The inverter reliably fulfils this condition.
• Legal certification: The inverter satisfies the conditions of the distribution network operator and standard EN 50549-1:2019 for parallel installation.
• Water heating: The system must provide accumulation heating in a storage tank with a minimum volume of 190 liters.
• Backup bivalent heat source: A bivalent heating source must be automatically connected to the system during periods when solar energy is insufficient to achieve the desired temperature.
• Burn protection: The hot-water circuit must contain mechanical or electronic burn protection against scalding from hot water from the tank.
• Qualified installation: Installation must be carried out by a supplier authorized according to Section 10d of Act No. 406/2000 Coll., on energy management.