GoodWe GW6000-SBP-20 - single-phase hybrid inverter 6 kW.

GoodWe GW6000-SBP-20 is a single-phase hybrid inverter rated at 6 kW for low-voltage LiFePO₄ batteries (40–60 V). Charge and discharge current up to 100 amperes, nominal output current 26.1 A, maximum 28.7 A. Generator support, mass 19.5 kg, 5-year warranty.

Six kilowatts: when backup covers almost the whole house

This is the rating at which the question 'what to put on backup' almost loses meaning — practically the entire domestic group of an average house can be hung on it.

Running simultaneously in practice: lighting, refrigerator and freezer, boiler with pumps, washing machine and dishwasher, television, computers, video surveillance, a mid-sized air conditioner. In other words, ordinary life without restrictions and without wondering what had better stay off.

Only genuinely heavy loads are worth leaving outside the backup: an electric cooker with the oven at full power, an instantaneous water heater, a welding set. Those can empty any domestic battery within tens of minutes.

A hundred amperes of charging at six kilowatts

Here charge current and power are finally balanced. A hundred amperes at around 48 volts gives nearly 5 kilowatts of flow into the battery — practically as much as the inverter delivers to the load.

What that means in life: the system can charge exactly as fast as it spends its reserve. If the panels generated a surplus during the day, it goes into the battery with no artificial limit. If a cheap night tariff applies, a full battery is gathered in two or three hours rather than across the whole night.

For regions with frequent, prolonged outages this is a key property: every short window of mains availability becomes a real reserve rather than a token percentage.

A practical autonomy calculation

Inverter power and battery capacity are different things and should not be confused. Six kilowatts says what you may switch on; how long it runs is determined by the storage.

A rough guide for a typical house: in economy mode (lighting, refrigerator, boiler, communications) consumption holds at 300–500 watts. A 10 kWh battery in that mode gives roughly a day. In normal mode with household appliances consumption rises to 1–1.5 kilowatts, and the same storage will last seven to ten hours.

Technical specifications

• nominal output current 26.1 A, maximum 28.7 A;

• battery charge and discharge current up to 100 A in both directions;

• battery voltage range 40–60 V, LiFePO₄ chemistry;

• MPPT tracking accuracy above 99%;

• external generator support;

• mass 19.5 kg, 5-year manufacturer warranty.

What to check before ordering

A nominal current of 26.1 amperes means the supply must be at least 32 amperes. For a six-kilowatt hybrid system that is no formality: the inverter can simultaneously supply loads and charge the battery from the grid, and total current in that mode reaches the limit.

The second point is battery placement. At currents up to 100 amperes the cable cross-section between storage and inverter becomes a serious cost item. Plan them adjacent, within one or two metres: every extra metre of heavy copper costs noticeable money and adds losses.

To size your system precisely, three figures are needed: the list of loads for backup, the desired autonomy and the supply rating. Send them over — we will select the battery capacity and say whether the six-kilowatt model is justified.