Tesla Powerwall
Whole-home or solar-paired backup
- Use case
- Solar owners wanting a polished app and installer ecosystem
- Capacity
- 10-15 kWh per unit
- Install path
- installer only
- Next step
- Installer quote comparison
Assumptions last reviewed 2026-08-27
Home battery backup cost calculator
Estimate installed battery backup cost by usable kWh, backup goal, battery class, panel work, solar pairing, and incentive scenario before you ask for quotes.
What the estimate separates
Load sizing Monthly kWh is divided by 30.4 unless you enter a direct daily kWh estimate.
Backup target The calculator applies your critical-load percentage, outage hours, reserve, and inverter margin.
Installed cost Hardware, base labor, panel work, permits, solar integration, and complexity multipliers are separated.
Result-linked guides
Use your result path to pick the right follow-up
Portable, critical-load, whole-home, and solar-plus-storage estimates have different quote risks. These guides keep the calculator assumptions tied to the next decision.
Whole-home battery quote See how battery count, backup scope, panel work, permits, and solar pairing change installed cost. Powerwall-class estimate Use Powerwall-style unit math when you are comparing premium installer ecosystems. Backup without solar Compare portable, critical-load, and grid-charged battery paths before buying equipment. Battery vs generator decision Match outage length, fuel tolerance, maintenance, and emissions to the right backup plan.
Battery class comparison
Compare backup battery systems before you price a quote
Use this table to separate portable outage kits, value stationary systems, and premium installer ecosystems before matching the calculator result to a buying path.
Enphase IQ Battery
Solar-plus-storage microinverter homes
- Use case
- Panel-level solar systems and modular expansion
- Capacity
- 3-10+ kWh modules
- Install path
- installer only
- Next step
- Installer quote comparison
FranklinWH
Whole-home load management
- Use case
- Homes that need smart circuits and generator pairing options
- Capacity
- 13+ kWh per unit
- Install path
- installer only
- Next step
- Installer quote comparison
Generac PWRcell
Generator-aware backup plans
- Use case
- Homes already comparing battery and generator paths
- Capacity
- 9-18+ kWh cabinets
- Install path
- installer only
- Next step
- Installer quote comparison
EcoFlow
Portable or semi-portable essentials
- Use case
- Refrigerator, internet, medical devices, and outage kits
- Capacity
- 1-12+ kWh systems
- Install path
- DIY friendly
- Next step
- Portable shopping list
Anker SOLIX
Portable essentials with expandable batteries
- Use case
- Quiet indoor backup for a few circuits or appliances
- Capacity
- 1-10+ kWh systems
- Install path
- DIY friendly
- Next step
- Portable shopping list
BLUETTI
Portable power station shoppers
- Use case
- DIY backup kits with solar charging options
- Capacity
- 2-18+ kWh systems
- Install path
- DIY friendly
- Next step
- Portable shopping list
EG4-style server-rack systems
Value stationary storage with compatible inverters
- Use case
- Budget-aware projects with experienced installers
- Capacity
- 5 kWh rack modules
- Install path
- electrician assisted
- Next step
- Inverter compatibility research
| System | Best fit | Typical use | Modularity | Install path | Lock-in | Next step |
|---|---|---|---|---|---|---|
| Tesla Powerwall 10-15 kWh per unit | Whole-home or solar-paired backup | Solar owners wanting a polished app and installer ecosystem | 13.5 kWh blocks | installer only | high | Installer quote comparison |
| Enphase IQ Battery 3-10+ kWh modules | Solar-plus-storage microinverter homes | Panel-level solar systems and modular expansion | Small modular batteries | installer only | high | Installer quote comparison |
| FranklinWH 13+ kWh per unit | Whole-home load management | Homes that need smart circuits and generator pairing options | Large wall batteries | installer only | medium | Installer quote comparison |
| Generac PWRcell 9-18+ kWh cabinets | Generator-aware backup plans | Homes already comparing battery and generator paths | Cabinet-based modules | installer only | medium | Installer quote comparison |
| EcoFlow 1-12+ kWh systems | Portable or semi-portable essentials | Refrigerator, internet, medical devices, and outage kits | Expansion batteries | DIY friendly | medium | Portable shopping list |
| Anker SOLIX 1-10+ kWh systems | Portable essentials with expandable batteries | Quiet indoor backup for a few circuits or appliances | Expansion batteries | DIY friendly | medium | Portable shopping list |
| BLUETTI 2-18+ kWh systems | Portable power station shoppers | DIY backup kits with solar charging options | Expansion batteries | DIY friendly | medium | Portable shopping list |
| EG4-style server-rack systems 5 kWh rack modules | Value stationary storage with compatible inverters | Budget-aware projects with experienced installers | Rack batteries | electrician assisted | low | Inverter compatibility research |
Comparison source note
DOE balance-of-system equipment guidance reviewed 2026-05-15. Capacity classes are rounded for homeowner comparison; DOE notes that battery systems require supporting power conditioning, safety, metering, and storage equipment.
Methodology
Static planning assumptions, not a live bid
Load sizing Monthly kWh is divided by 30.4 unless you enter a direct daily kWh estimate.
Backup target The calculator applies your critical-load percentage, outage hours, reserve, and inverter margin.
Installed cost Hardware, base labor, panel work, permits, solar integration, and complexity multipliers are separated.
Incentives The 2026 federal default is $0; legacy and manual modes are only planning scenarios.
Product research
Portable and critical-load product research
For smaller backup paths, compare products only after you know the load list, surge wattage, and transfer-safe accessory needs.
Affiliate disclosure
Some product links may earn a commission when an approved affiliate URL is configured. If no affiliate URL is active, the card sends you to a non-affiliate merchant or source page instead.
Portable power station Fallback link
BLUETTI
Expandable home backup power station
- Merchant
- BLUETTI
- Best for
- portable, critical loads
May earn a commission when the configured affiliate URL is active.
Portable power station Fallback link
Anker SOLIX
Expandable portable battery system
- Merchant
- Anker SOLIX
- Best for
- portable, critical loads
May earn a commission when the configured affiliate URL is active.
Portable power station Fallback link
EcoFlow
Delta series backup system
- Merchant
- EcoFlow
- Best for
- portable, critical loads
May earn a commission when the configured affiliate URL is active.
Affiliate source notes
BLUETTI affiliate program reviewed 2026-05-15. Affiliate URL is only used when a configured environment URL exists; otherwise product cards must use the merchant fallback URL.
Anker affiliate program reviewed 2026-05-15. Affiliate URL is only used when a configured environment URL exists; otherwise product cards must use the merchant fallback URL.
EcoFlow affiliate program reviewed 2026-05-15. Affiliate URL is only used when a configured environment URL exists; otherwise product cards must use the merchant fallback URL.