The verdict, in one paragraph
If you want whole-home backup as one purchase, the EcoFlow DELTA Pro Ultra with Smart Home Panel 2 is the most complete matched kit: 6,144Wh, 7,200W of native 120/240V, 12 circuits and a 20ms switchover in a single listed package. The Anker SOLIX F3800 Plus with Double Power Hub brings more raw capacity at 7,680Wh in Anker's paired configuration. At the other end, an Anker SOLIX Smart Inlet Box gets a battery into house circuits manually for a fraction of a sub-panel budget. The reason to buy a kit rather than assemble one is published by UL and is not a matter of opinion: combining independently certified products in the field does not create a certified, Listed system.
How these were chosen
This site runs no test bench and owns none of this equipment. Every figure below is the manufacturer's published number, cited at the foot of the page. Two rules shaped the list:
- It has to be buyable as a unit. Every entry resolves to a specific, currently in-stock listing — checked before writing, not assumed. A system you have to assemble from four part numbers across three vendors is the thing this page exists to compare against.
- Published integration, not inferred compatibility. Where a manufacturer states which inverter works with which panel, we use that. Where it does not, the row says so.
Standby generators are not in the lineup. They are installer-mediated equipment not sold through a retail buy button — the whole-house generator page covers that route.
What each package actually includes
| System | Battery | Output | Switching included | Circuits |
|---|
| EcoFlow DPU + Smart Home Panel 2 | 6,144 Wh | 7,200 W, 120V/240V; 10.8 kW surge | Yes - 20 ms auto | 12 |
|---|
| Anker F3800 Plus + Double Power Hub | 7,680 Wh | Up to 12 kW paired, 120V/240V | No - hub links units, panel sold separately | 12 with Home Power Panel |
|---|
| EcoFlow Smart Home Panel 2 alone | None - add an inverter | Depends on the paired unit | Yes - 20 ms auto | 12 |
|---|
| Anker SOLIX Smart Inlet Box | None - add a station | Depends on the paired unit | Manual | Whole-home, manually switched |
|---|
| BLUETTI Apex 300 | 2,764.8 Wh, B300K expandable | 3,840 W, simultaneous 120V/240V | No - Home Integration Kit separate | Not published |
|---|
| EcoFlow DELTA Pro 3 | 4,096 Wh | 4,000 W, 240V as a selected mode | No - Smart Home Panel 2 separate | 12 with the panel |
|---|
Manufacturer figures, cited under Sources. "Not published" means we could not find it on the maker's own pages. Current prices sit inside the buy buttons above, each with the date it was refreshed — and the gap between a bundle and the sum of its parts moves, so compare them on the day.
The listing argument, which is the real reason to buy a kit
UL's code-authority guidance contains one sentence that settles most of this debate: combining independently certified products in the field does not create a certified (Listed) system.
That matters in four concrete places:
- Inspection. IRC Section R328 and NFPA 855 Chapter 15 require a residential ESS to be listed to UL 9540 and installed in accordance with its listing. A field assembly of separately listed parts does not satisfy that cleanly, and an inspector can say so.
- Insurance. A claim involving a non-listed installation is a harder conversation than one involving a manufacturer's matched kit.
- Warranty. Two manufacturers each blaming the other component is the standard failure mode of a mixed system. One vendor for the whole chain removes that.
- It actually works on day one. Switchover timing, circuit control and app monitoring are integration features. They exist between the battery and the panel, which is precisely the seam a mixed build has to invent.
What an all-in-one still does not include
"All-in-one" describes the equipment, not the project. None of these kits includes:
- The electrician. Anything wired to a panel needs a licensed install, a permit and an inspection.
- The siting work. Published residential rules put a hardwired system in a garage, a basement, a utility space, on an exterior wall or outdoors — never living space — with 80 kWh aggregate in the garage tier and 40 kWh in interior non-habitable spaces. Unfinished framing may need 5/8-inch Type X gypsum board.
- Solar. Panels, racking and the roof work are a separate project with separate approvals.
- A generator. Even where the panel supports one — EcoFlow publishes 3 to 12kW gas generator support on the Smart Home Panel 2 — the engine is yours to buy.
Kit versus components: when assembling is the right call
Buying the package is not always correct. Three cases where components win:
- You already own the battery. Adding a Smart Home Panel 2 to a DELTA Pro 3 you bought last year is cheaper than replacing the lot, and it is still a single-manufacturer pairing.
- You are scaling over years. The Apex 300 route — a capable split-phase unit now, B300K modules later — spreads the cost without ever leaving one ecosystem.
- Manual switching is genuinely enough. If somebody is home for most outages, an inlet box plus a station does the job for a fraction of a smart panel, and connecting a source to your house covers the legal ways to wire it.
What does not work is mixing brands across the battery, the inverter and the switching. That is the specific case UL's sentence is about.
Which one, for which house
- Whole house, automatic, one purchase: EcoFlow DELTA Pro Ultra with Smart Home Panel 2.
- Rural, 240V loads, maximum runtime: Anker F3800 Plus with Double Power Hub, adding the Home Power Panel for automatic circuits.
- You already own a DELTA Pro-family battery: the Smart Home Panel 2 on its own.
- Whole-home on a budget, somebody is home: Anker Smart Inlet Box plus a station you already have.
- Building up over several seasons: BLUETTI Apex 300, then B300K modules, then the Home Integration Kit.
- A critical-load list, not a house: none of these. A single plug-in unit is the better buy — the home battery roundup covers it.
The short version
An all-in-one is worth paying for because the integration is the product: switchover timing, circuit control and monitoring all live between the battery and the panel, and UL is explicit that bolting separately listed parts together in the field does not produce a listed system. EcoFlow's DELTA Pro Ultra with Smart Home Panel 2 is the most complete package, Anker's paired F3800 bundle brings the most capacity, and an inlet box is the honest budget route. Whichever you choose, stay inside one manufacturer's matched components and budget for the electrician the box does not contain.
