Germany’s Fraunhofer ISE is applying its FlexTrail-printing technology to the direct metallization of silicon heterojunction solar cells. It said the technique reduces the use of silver, while maintaining high efficiency levels.

Scientists in Hong Kong have designed a redox flow battery with electrolytes made of zinc and cerium. They claim to have solved the incompatibility issue posed by these two elements. The device achieved a record average Coulombic efficiency of 94% during cycling.

The two batteries have a storage capacity of 13 and 19.5 kWh, respectively. Both lithium-ion systems use LiFePO4 as the cathode material and have a round-trip efficiency of over 86%.

Enel Green Power’s new solar panel has average efficiencies ranging from 22.6% to 22.9% and a temperature coefficient of -0.24% per degree Celsius. It is based on an n-type solar cell with G12 format and a power conversion efficiency of 24.6%.

The new module series has a power output ranging from 420 to 430 W, a temperature coefficient of -0.26% per degree Celsius, and an efficiency of up to 22.2%.

Paired Power said its new 5 kW solar canopy measures 3.2 meters x 5.2 meters x 3.7 meters and can host up to 10 bifacial solar panels. It can be used in on-grid or off-grid modes and can be paired with lithium-ion battery storage systems up to 40 kWh in size.

US manufacturer Yotta Energy said that its two new microinverters are compatible with up to four high-power PV modules. They have a peak efficiency of 96.5% and a nominal maximum power point tracking (MPPT) efficiency of 99.5%.

Scientists in Australia have developed a new way to produce hydrogen using water from the atmosphere. They claim their new module can ensure stable performance and provide green hydrogen for remote areas.

China’s Bslbatt said its new battery has a rated capacity of 200 Ah. The product comes with a 10-year warranty and can reportedly provide steady operation for up to 6,000 charge cycles.

Solinteg’s new hybrid inverters come in seven versions with nominal power ranging from 3 kW to 9 kW, an efficiency rating of 97.6%, and a European efficiency of 97.0%. They measure 534 mm × 418 mm × 210 mm and weigh 27 kg.