Battery - storage companies need longer grid - service contracts to match the 10 - 10 year payback trajectory of their customers and therefore secure delivery , according to a survey by SmartestEnergy . The UK 's existing Grid Enhanced Frequency Response contracts are limited to a maximum of 10 years .
Battery-storage innovators need longer grid-service contracts to match the 5-10 year payback trajectory of their technologies and therefore secure financing, according to a survey by SmartestEnergy. The UK's National Grid Enhanced Frequency Response contracts are limited to a maximum of four years.