• Expandable capacity – Increase the capacity of DELTA 2 Max with an extra 2046Wh.• Triple the power – 2-6kWh expandable capacity to fit your energy storage needs. Add up to two DELTA 2 Max Smart Extra Batteries to hit a capacity of 6144Wh. Ideal for home backup, caravanning, outdoors or even everyday use.• Built to last 6× longer – Get 10 years of daily use until hitting 80% of its original capacity. That’s down to its LFP battery chemistry giving you 3000 cycles.• 5-Year Warranty• Expandable capacity – Increase the capacity of DELTA 2 Max with an extra 2046Wh.• Triple the power – 2-6kWh expandable capacity to fit your energy storage needs. Add up to two DELTA 2 Max Smart Extra Batteries to hit a capacity of 6144Wh. Ideal for home backup, caravanning, outdoors or even everyday use.• Built to last 6× longer – Get 10 years of daily use until hitting 80% of its original capacity. That’s down to its LFP battery chemistry giving you 3000 cycles.• 5-Year Warranty