The new inverter can be used in DC or AC coupled systems with an efficiency of up to 98.5%. The device is available in two versions with powers of 7.6 kW and 11.4 kW, with up to 200% DC oversize and 50 V starting voltage.
American DC power optimizer technology provider Tigo Energy has introduced a new string inverter suitable for DC or AC coupled systems.
There are two versions of EI inverters with output powers of 7.6 and 11.4 kW, compatible with any lithium iron phosphate battery technology.
The size of the 7.6 kW unit is 400 x 170 x 570 mm and the weight is 14.65 kg. The maximum recommended photovoltaic power of this inverter is 15.2 kW, and the maximum system voltage is 600 V. The product has two maximum power point tracking (MPPT) inputs, and the maximum input current of the MPPT is 13.5 A. The battery capacity of each case is 9.9 kWh. The maximum efficiency of this device is 98.4%.
The size of the 11.4 kW inverter is 400 x 187 x 638 mm and the weight is 20.5 kg. Its highest efficiency reaches 98.5%, and the battery capacity of each casing is 19.8 kWh. The maximum recommended photovoltaic power of this inverter is 22.8 kW, and the maximum system voltage is the same as that of smaller devices. The product has three MPPT inputs, and the maximum input current of the MPPT is 16.9 A.
The nominal AC voltages of these two devices are both 208/240 V, and the output voltages are 32 A and 38 A, respectively. They can be used for projects up to 3,000 m above sea level, with a temperature range of -25 degrees Celsius to 60 degrees Celsius. Both products are cooled by a natural convection system, and have a DC oversize of up to 200% and a starting voltage of 50 V.
The manufacturer stated that the new inverter, combined with the new Tigo EI battery released yesterday, can coordinate energy production and consumption. The battery has a storage capacity of 9.9 kWh, a size of 650 x 320 x 1160 mm, and a weight of 140 kg.
The storage system provides 5 kW continuous power and 6 kW peak power, with a nominal voltage of 400 V. It comes with P56/NEMA Type 4 protection. Tigo Energy stated that its operation guarantees 6,000 cycles and the depth of discharge is 90%.
The warranty period of the inverter is 152 months, and the warranty period of the storage system is 132 months. "These products are designed to provide installers with simple and integrated complex functions, as well as scalable system maintenance and customer service," the company said.
*The article was updated on September 27, and the storage capacity of the battery is expressed in kWh.
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More articles by Emiliano Bellini
It is great to see inverter manufacturers upgrade their products to handle the increased DC to AC ratio. They usually reach 150%; this can be a 2:1 ratio. Oops, the storage of battery products should be expressed in kilowatt hours instead of kilowatts.
Thanks for the news, Gary. The article was revised.
Wait, is this Fronius IG+ in the box?
Hey Alex, this is the answer from Tigo: "Although Tigo did not disclose its engineering and manufacturing partners, we can confirm that it is not the company mentioned in your question."
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