I am considering adding batteries to my system for power outage protection. I am on LA DWP. My question is if this advice from AI is true and/or significant...

Solar Production vs. Storage Capacity: Your 39-panel array generates ~14 kW at peak sun. A single 10C battery stores 10.0 kWh usable capacity. During a daytime blackout, your solar panels will completely fill that battery in under 45 minutes of bright sunlight. Once full, the Enphase System Controller will shut off or throttle down most of your 39 panels because the power has nowhere to go.