Load-shed modules vs a smart panel: covering more house with less backup

A 14 kW generator can look “too small” because the well, the air conditioner, and the dryer all want to start in the same minute. Load shedding is the move that drops the dryer (or the AC) so the well still runs. A smart panel is the expensive version of that idea: every circuit is a switch the software can open, which is how a battery covers more of the house without a second pack. A critical-load panel is the cheap version: a short, fixed list that stays on backup and everything else goes dark.

Those three jobs get sold as the same sentence. They are not. One is a $200 module on an air-conditioner disconnect. One is a new main panel. One is a subpanel and a transfer switch. If you mix them up, you pay for a SPAN when a Generac load manager would have saved the 22 kW upsell, or you buy modules and still cannot pick circuits from your phone during a battery outage.

Panel swaps and generator load managers are electrician work in most towns.

What are you actually buying?

A critical-load (essentials) subpanel. Selected circuits live in a small extra box. Grid on a normal day, generator or battery through a transfer switch when the street is dead. The list is wired. You do not get to turn the oven on from an app. Popular Mechanics notes most manual switches cover a limited set, often six to ten circuits. That is the sizing first pass: fridge, furnace blower, sump, well, lights, internet box. Leave the dryer off on purpose.

Popular Mechanics: manual transfer switch

Generator load-shed modules. A box on a 240-volt load (air conditioner, range, whole subpanel) that watches generator frequency. When the engine sags, the module opens the load, waits, and tries again on a priority delay. Generac’s 100-amp Load Manager (model 7006) is 240 V, up to 100 A resistive / 90 A inductive, Type 3R, up to eight modules per system, no extra control wires. Northern Tool lists it at $379. The 50-amp 7000 is $169 on the same shop. HomeGuide’s standby-cost page puts “smart load managers” around $130 to $250, which is the smaller-module band, not a SPAN.

Northern Tool: Generac 7006 100-amp SMM

HomeGuide: whole house generator cost

Generac’s own manual is blunt: the product is not for critical life support. It sheds large appliance loads so the generator is not overloaded. Priority 1 comes back first. Lock-out can keep a hot tub off the whole time you are on generator.

A smart panel (SPAN-class). This replaces the main load center. SPAN’s support page lists hardware MSRP, no install: MLO 24 $2,550, MAIN 16 $2,950, MAIN 32 $3,500, MLO 48 $3,850, MAIN 40 $4,100, plus SPAN Drive $750 and a remote meter kit $795. Install is a licensed SPAN-authorized electrician, same day-shape as a panel swap. Ten-year limited warranty on the panel. Circuit-level monitoring and control from an app. SPAN’s backup time-remaining and automatic outage shedding are for compatible battery storage, not a generator-only house. A standby generator, SPAN says, has to sit upstream with listed automatic or manual transfer equipment.

SPAN: how can I get SPAN

SPAN Panel

SPAN also claims about 40% longer average backup versus a traditional critical-loads subpanel in its own outage testing. That is a manufacturer figure. Your fridge and well will disagree. Treat it as “you can keep more circuits in play,” not as a second battery in the garage.

A dumb 200-amp panel swap, for comparison, is Angi’s $1,300 to $2,000 installed on the 200-amp line (panel only $250 to $350). HomeGuide’s 100-to-200 jump is $1,300 to $1,600, or $1,800 to $2,500 if a new service panel is required. The 200-amp upgrade page is the box-versus-street fork. SPAN’s hardware already costs more than that whole Angi band before anyone opens a wall.

Angi: cost to upgrade an electrical panel, 2026

HomeGuide: cost to replace an electrical panel

When does a $379 module beat a $3,500 panel?

You already have, or you are buying, a standby generator with an automatic transfer switch, and the problem is two big 240-volt loads stacking. Put a 100-amp manager on the air conditioner and another on the range or the EVSE. The well and the furnace stay un-managed and first in line. HomeGuide is right that this is often cheaper than jumping a generator size class. A 16 kW unit plus two modules can cover a house that a 22 kW chart said you “needed.”

You do not get whole-house circuit picking. You do not get battery time-remaining. You do not avoid a 200-amp service upgrade for a heat pump plus two chargers. The module only knows generator frequency, not your utility service rating.

Knockoff “compatible with 7006” Amazon bricks are not the bid. Buy the OEM part the generator dealer will stand behind, or have them supply it. Installation is still an electrician: 240-volt, 100-amp, weatherproof can.

If the load is a 4-ton condenser or a whole subpanel, the 100-amp 7006 at $379 (Northern Tool) is the size that matches Generac’s 100 A / 90 A inductive rating, not the 50-amp can.

When does a smart panel earn the extra money?

You are pairing a battery (Powerwall-class, Enphase, FranklinWH) and you hate the six-circuit essentials box. SPAN, Lumin-style overlays, and similar products let you keep more of the house in the backup pool and drop the dryer from the app or automatically when the pack is low. SPAN’s 40% line is that story.

You are adding an EV charger or a heat pump and the load calculation says 200-amp service is tight if everything runs at once. SPAN’s PowerUp energy-management pitch is to pause pre-selected circuits (today, they say, primarily EV charger loads) so you might skip a utility service upgrade. That only works if the electrician runs a real calculation and the utility accepts managed loads. It is not a promise that a 100-amp house can take two chargers and a heat pump. The Level 2 charger page is still the circuit and the panel.

You were replacing the panel anyway (full, damaged, or going to 200 amps). Then the incremental cost is SPAN MSRP minus a $1,300 to $2,000 dumb panel, plus commissioning, not a $8,000 science project on a fine Square D.

You do not buy SPAN as a substitute transfer switch for a generator-only house. SPAN is explicit: generator upstream, listed transfer equipment, and the fancy outage UI is for batteries.

Lumin-class products mount beside an existing panel and manage a handful of circuits. Installer blogs put that retrofit in a lower band than a full SPAN swap. Get the model, circuit count, and whether it is a panel replacement or an add-on in writing. Do not compare a 12-circuit overlay to a 32-circuit main.

What should three real-looking bids mean?

Bid A, generator plus modules. Existing or new standby, ATS, one or two Generac 7006/7000 managers on named 240-volt loads, priorities written (AC = 3, range = 5, well unmanaged). Hardware $169 to $379 each plus electrician time. This is how you keep a 14 to 16 kW machine.

Bid B, critical-load subpanel. Six to ten circuits, transfer switch, no app. Fridge and heat stay up. Dryer never was going to. This is the battery-or-small-generator default and the cheapest honest backup.

Bid C, smart panel. SPAN (or named equivalent) replacing the main, authorized installer, battery make and model on the bid, which circuits are backup-priority, whether a generator ATS is still in the scope, Wi-Fi or ethernet, and the hardware MSRP line ($2,550 to $4,100) separate from labor and breakers. If Bid C is $6,000 and has no battery, ask why you are not on Bid A or B.

What has to be on the quote?

1. Which architecture: modules, subpanel, overlay, or main-panel replacement. One sentence.
2. Named loads to shed, with amp rating (50 vs 100) and priority order.
3. Generator kW and fuel derate, or battery kWh usable, so the shed list matches the machine. See sizing and usable kWh.
4. For SPAN: model (MAIN 32 vs MLO 24), MSRP, authorized installer, battery compatibility, and that a generator (if any) is upstream with a listed ATS.
5. For modules: OEM part number, not a no-name “7006 compatible.”
6. Service size vs panel size. Load management does not fix a 60-amp mast.
7. Permit, outage hours, and who labels the breakers after.
8. What happens in a Wi-Fi outage. SPAN needs internet for the app and OTA; the panel still has to fail safe as a panel.

How does this go wrong?

The salesperson sizes a 22 kW generator because the AC and the well can start together, and nobody priced two $379 managers.

SPAN is sold as the transfer switch. The generator lands on the bus with no listed ATS. That is a code and a warranty problem.

Priorities are “whatever the app defaulted.” The hot tub is priority 1 and the furnace is 8.

A critical-load panel is called a smart panel on the invoice. You cannot add the office later without pulling wire.

Managed-load “skip the service upgrade” is assumed, not calculated. The utility still wants a 400-amp service.

Knockoff modules on a Generac standby. The dealer will not touch them after the first false shed.

How do I decide this week?

1. Write the outage list you refuse to lose (fridge, heat, sump, well, internet). If that is the whole story, bid a critical-load panel, not a smart main.
2. If you already want a standby and the fight is the air conditioner, price OEM 50-amp or 100-amp load managers before you jump a generator size.
3. If you are buying a battery and you want more than ten circuits in play, price a SPAN-class panel with the battery make on the same bid, and keep a listed ATS if a generator is still in the plan.
4. Separate hardware MSRP from labor. SPAN $2,550 to $4,100 is not the installed number. Angi $1,300 to $2,000 is the dumb-panel floor.
5. Put shed priorities in writing: what drops first, what never drops, what is locked out on generator.
6. Do not buy a no-name 7006 clone. If the electrician will not install the OEM can, find another electrician.