A Span panel is a load center whose breakers can be switched and prioritized from an app, and that matters most at one particular moment: when the grid is down and a battery is carrying the house. Instead of a fixed critical-loads subpanel wired the day the solar went in, the list of what stays on becomes a setting you can change — refrigeration and lights now, the dryer and the EV charger later. What a particular panel will actually do during an outage, and how it decides, is the manufacturer's specification rather than ours; read it and get it in writing before you settle on a model. Our half is ordinary load-center work done carefully: feeders, grounding and bonding, circuit transfers, permit, inspection — and then a commissioning step where the panel comes online, every circuit is named against what it truly feeds, and the outage priorities get set with you rather than left at defaults.
We install these and we are glad to. What we will not do is tell you that you need one. A smart panel costs meaningfully more than a conventional load center, and it adds a software dependency to a piece of equipment that otherwise has none. The feature that earns the difference is load management during an outage, and that only matters if you have a battery or are planning one. Without a battery, what you are buying is circuit-level visibility and remote switching — genuinely useful, and a matter of taste rather than necessity. Siemens is what we install by default on conventional panel work, and for most homes it is still the right answer. When a Span is what you want, we install it properly, configure it, and hand it over labeled.
Outage planning is a conversation about tiers, and it is worth having before the equipment is ordered rather than during the first shutoff. A battery holds a finite amount of energy and can deliver only so much at once, so the useful question is not what you would like to keep on — it is what you want still running at hour twelve. That list is usually short: refrigeration, a few lights, the well pump if you are on one, medical equipment, the internet. Below it sit the loads you would take back when the sun is out and the battery is recharging: the heat pump, the range, the EV charger. Which of your circuits can sit in which tier depends on where the panel lands in your service, because a panel can only manage the circuits that pass through it. We settle that before we order, and we design it alongside the battery instead of bolting it on afterwards.
One question worth asking before you buy. Some homeowners look at a smart panel as a way to add an EV charger, a heat pump, and induction without upsizing the service — letting the panel shed loads instead of buying more capacity. That can be a legitimate design and it can also be wishful, and which one depends on the load calculation for your specific house and on whether your building department will accept a managed-load approach. For most addresses in this area that department is the County; only Santa Cruz, Capitola, Scotts Valley, and Watsonville run their own. Run the Panel Load Calculator to see where you actually stand, and expect us to confirm the approach with the jurisdiction before we design around it rather than after.