GO Battery (EU)

GO Battery (EU) is Tigo Energy’s current stackable high-voltage battery for European EI inverter systems. Tigo announced it in April 2026 and reported that European shipments began on 17 June 2026. The datasheet includes UKCA marking, but stock and support for a particular United Kingdom project still need checking with the supplier.

Capacity and power

Each TGB-M3.6 LFP module has 3.68 kWh nominal energy and weighs 34 kg. The family uses two to thirteen modules, giving 7.3 to 47.9 kWh nominal system energy. Tigo states 3.5 to 23.3 kW nominal power and 5.1 to 33.2 kW peak power across that full range. A single-phase EI inverter supports two to eight modules, while the three-phase inverter supports three to thirteen.

These are family ranges rather than ratings for every stack. The battery model, module count and compatible inverter determine the energy and power that apply to an assembly.

Operating boundaries

The stated depth of discharge is 90%. Tigo reports more than 6,000 cycles under a specified laboratory test at 25°C, 0.5C and 70% end-of-life capacity. That test figure is not a promise of the same cycle count in every installation.

The floor-mounted enclosure is rated IP65. With its integrated heater, the published charging and discharging temperature range is -30°C to 53°C. Location still has to comply with the current installation instructions and applicable UK battery-storage and electrical requirements.

System and warranty

GO Battery (EU) is designed for a Tigo EI Inverter (EU) rather than presented as a battery for arbitrary third-party inverters. Tigo’s general residential warranty effective from 15 March 2026 gives “GO Battery” 120 months and 65% retained capacity, with registration and connectivity conditions. Those terms do not name the TGB European model codes, so the warranty supplied with the exact system remains the controlling evidence.

Related entries

• Tigo Energy
• EI Link (EU)
• Usable battery capacity