EESU Emergency Energy Supply Unit

Portable emergency energy for disaster relief

The StorTera Emergency Energy Supply Unit (EESU) is a portable battery backpack system that has been developed in collaboration with a Sri Lankan aid charity to support disaster relief efforts around the world and to bring power to remote or difficult to access locations. The EESU can provide instant power anywhere, anytime of the day, and has the ability to be connected to a range of generation sources to ensure emergency power is always available to those in need.

An aid worker from Kera-Charity with the prototype EESU

Taking power to those that need it

In 2016, hazard-related disasters affected more than 445 million people globally and preliminary data indicates that another 80 million were affected by 149 disasters in 73 countries in the first quarter of 2017 (EM-DAT 2017). Power is critical in helping people recover from disasters; communications, refrigeration of medical supplies, and lighting can help prevent unnecessary deaths and suffering. Often in these situations, the infrastructure is not available to get power to where it is needed in time. StorTera’s EESU allows aid organisations to get power to where it is needed fast, bringing essential resources to victims of disasters and saving lives. 

Image credit: trokilinochchi CC BY 2.0

Image credit: Vikalpa | Groundviews | CPA from Sri Lanka CC BY 2.0

Technical characteristics

The EESU is comprised of two 20 litre backpacks weighing approximately 25kg each. With a total power capacity of 5kW/2.5kWh each, the system can provide enough power for a normal household for 3 days. The backpacks have the ability to be connected in parallel for higher energy requirements; for example to power medical facilities in a disaster relief camp or a telecom site. To ensure flexibility and ensure a high state of readiness is maintained at all times the system can be connected to DC or AC power sources for recharging from solar panels, diesel generators or the grid.

The safe, lightweight and highly energy dense EESU uses proprietary on-board GaN power electronics – which have a higher power density compared to standard Silicon IGBT based technology – developed by StorTera to ensure a rugged, reliable and portable product which can withstand the harsh environments it will encounter in disaster relief situations.