Portable or whole-home backup, decided.
Two ways to keep the lights on
Backup power splits into two philosophies. A portable station is an appliance: it sits where you put it, your essentials plug into it, and it moves — to the campsite, the job, the neighbor's house. A whole-home system is infrastructure: it ties into your electrical panel and carries circuits, not extension cords.
Neither is the upgrade of the other. They answer different outage plans, and plenty of households justifiably run both.
The milliseconds that decide it
When the grid drops, the number that matters is how fast the backup takes over. Across the systems we carry that ranges from 0 ms — true online UPS behavior on the BLUETTI Apex 300 and Jackery Explorer 5000 Plus — to 10 or 20 ms on other units. Network gear and laptops generally ride through 10–20 ms. Desktop computers, servers and workstations belong on a 0 ms unit: Jackery says plainly that its 20 ms stations are not a 0 ms UPS and not for those loads. Every product page states its figure.
The catch: UPS switchover only protects what is electrically connected before the outage. A station in the closet protects nothing.
Plug-connected: capability without the electrician
The middle path has grown up. Plug-connected systems like the Apex 300 and the HomePower 3600 family deliver split-phase or high-wattage output and multi-day capacity with no installation at all — they arrive, they plug in, your essentials plug into them. Expansion batteries stack capacity later without tools.
The limits are honest ones: what they back up is what reaches them by cord, and heavy fixed loads — well pumps, HVAC, hardwired circuits — stay out of reach without panel work.
The transfer switch: circuits, not cords
A transfer switch — installed by a licensed electrician — connects a station to selected panel circuits. The Explorer 5000 Plus with the Smart Transfer Switch backs up to twelve circuits and switches them over in 20 ms or less — the 0 ms figure applies only to loads plugged straight into the station — and pairing two stations reaches 120/240 V for the loads that need both legs.
This is the point where backup power becomes an electrical project. Permits and a professional install are part of the price, and we say so before you order rather than after.
Hardwired: the panel-first option
At the top sit hardwired hybrid systems like the POWISER H12 Pro (ask us) — 12 kW split-phase with storage built in, installed into the panel like the infrastructure it is. One honesty note we keep visible: its UL listing is in progress per the manufacturer's documentation, and that line stays on the product page until the paperwork lands.
Three questions settle it
- What must stay on? A short cord-reachable list points portable or plug-connected; fixed circuits point to a switch or hardwired system.
- Who is home when it fails? Panel-tied systems work unattended; a portable station assumes someone plugs things in.
- Does it ever leave the house? If the same battery should serve the campsite and the outage, portable wins by definition.
One from each path
A portable station, a plug-connected system, and a transfer-switch package: the Explorer 2000 v2, the Apex 300 and the Explorer 5000 Plus with Smart Transfer Switch — figures from the manufacturers' specifications. Prices and stock read live from each product page.
| Spec | Explorer 2000 v2 + Guard Bag | BLUETTI Apex 300 | E5000 Plus + STS |
|---|---|---|---|
| Output | 2,200 W | 3,840 W split-phase 120/240 V | 7,200 W · 14,400 W paired |
| Capacity | 2,042 Wh | 2,764.8 Wh, up to six expansion batteries | 5,040 Wh, expands to 60 kWh |
| Switchover | 20 ms | 0 ms | 0 ms UPS; 20 ms or less via switch |
| Install | None — portable | None — plug-connected | Licensed electrician |
| Price | $1,009.00 | $1,599.00 | $3,989.00 |
| Buy |
Before you order
Questions we get
Can I just run a cord from a generator into an outlet?
No. Backfeeding an outlet is dangerous — it can energize the utility line outside and it bypasses every protection in the panel. If you want circuits fed, have an inlet or a transfer switch installed by a licensed electrician.
Do I need a permit?
For a plug-in portable, no. For anything connecting to the panel, requirements vary by city and county. Confirm with your local building authority and use a licensed electrician.
Can I start portable and upgrade later?
Often yes, if you buy a station that supports a transfer switch and expansion batteries. Tell us that is the plan and we will steer you away from the models that dead-end.
How long does an install take?
Once an electrician is booked, a straightforward transfer-switch job is usually short. The wait is the booking and any permit, not the work. Get an estimate before you order the hardware.
Keep planning
