Split-phase inverter selection is mainly about output architecture. A buyer serving North American style homes needs 120/240V behavior, not just a large kW number.
The battery side matters too: many split-phase inverters use a 48/51.2V battery platform and require compatible BMS communication.
Check L1, L2 and neutral requirements
The inverter must provide the correct line-to-neutral and line-to-line voltage. This is especially important when the backup panel includes mixed 120V and 240V loads.
Surge rating matters for real homes
Pumps, compressors and workshop tools can trip a weak inverter even when the running wattage looks acceptable. Peak power should be part of every split-phase RFQ.