-7.2kW-21.6kW output with up to 3 inverters -Up to 90kWh capacity with 3 inverters and 15 batteries -5.6kW-16.8kW solar input with up to 3 inverters -Online UPS, 0-ms transfer time -LFP battery *Note: If three or more battery packs are stacked, an EcoFlow Fixing Metal Tab is needed to hold them in position. EcoFlow Portable Stand allows you to stack one DELTA Pro Ultra Inverter and 5 Batteries. However, for long-time use, do not move the whole set of products if you connect the inverter to three or more batteries and lock casters by flicking the brake down, so that the product can&';t be moved anymore.