Pick an inverter that carries everything running at once, with headroom for the worst motor start.
The designer sizes the inverter against your real simultaneous loads, then the battery, solar and every cable to match.
Design my system — freeNo account needed to design. Same engine, same standards as this calculator.
The continuous rating must cover everything that can run at the same time; the surge rating must cover the biggest start-up spike (motors and compressors draw several times their running watts for a moment). Size to the continuous figure, then check surge.
Continuous is steady draw; surge is the brief spike when a motor or compressor starts — often 2-3x running watts. The inverter must handle both.
About a minute. No account, no email.