Portable tier
Best for 2kWh backup
EcoFlow DELTA 2 Max
9.1SCORE
2,048Wh2,400WExpandable
Strong bridge between portable and modular backup.
System planning hub
Solar and Whole-Home Battery Backup
Start with critical loads, outage duration, and recharge strategy. Portable batteries, expandable power stations, and installed home systems solve very different problems.
System diagram
Show panels → battery → critical loads so buyers understand the whole plan.
Show panels → battery → critical loads so buyers understand the whole plan.
Tier 1
Portable essentials
1–2kWh station for fridge, Wi-Fi, lights, CPAP, and device charging.
Tier 2
Expandable backup
2–8kWh modular system with faster solar recovery and higher output.
Tier 3
Installed whole-home
Permanent battery, transfer equipment, and professional electrical design.
Critical-load planner
| Load | Watts | Hours/day | Wh/day |
|---|---|---|---|
| Refrigerator | 150 avg. | 8 cycle eq. | 1,200 |
| Router | 12 | 24 | 288 |
| Lights | 40 | 6 | 240 |
| CPAP | 40 | 8 | 320 |
| Total | 2,048Wh/day |
Example plan
Two days of critical loads
4.1kWh
Add reserve and charging losses, then choose solar input that can replace daily consumption.
Daily solar recovery estimate
Illustrative only. Weather, panel angle, temperature, shading, and controller limits change output.
System safety
Installed transfer equipment requires qualified electrical work.
Never backfeed a home through an outlet. Follow product instructions and local electrical requirements.
Recommended platforms
Choose by system tier
Use separate tables for portable, expandable, and professionally installed solutions.
Expandable tier
Best for RV & multi-day use
Jackery 2000 Plus
8.9SCORE
2,042Wh3,000WExpandable
High output with modular batteries for longer runtime.
Installed tier
Best for whole-home loads
Home battery system
PlanningSCORE
Professional designTransfer equipmentPermits
Use a planning lead form, not a one-click retail button.