When selecting a solar battery for Huawei systems, prioritize compatibility with Huawei's SUN2000 or FusionSolar inverters, sufficient storage capacity (typically 5–15 kWh), high round-trip efficiency (above 90%), and strong cycle life (6,000+ cycles at 80% DoD). This guide explains why, how to choose the right capacity, what to check before buying, and when a non-Huawei battery becomes a warranty and support risk. For most residential. The Huawei FusionSolar hybrid inverter The second-generation residential solar inverter was released in April 2020, only two years after the first version. The SUN2000-L1 series ranges from 2kW to 6kW and features 'dual MPPTs' with a wide operating voltage range of 120V to 600V.