Battery storage

Power that doesn’t blink.

Add a battery to your solar system to keep critical circuits running through outages, dodge peak-rate charges, and store cheap daytime sun for the evening.

Get a battery quote

Model my savings

scroll down

Why add a battery

Four problems batteries solve.

Outage backup

Time-of-use arbitrage

Self-consumption

Demand-charge cutting

Large flat-roof systems with minimal operational disruption.

Get a free quote

Outage backup

Large flat-roof systems with minimal operational disruption.

Time-of-use arbitrage

Charge mid-day, discharge during expensive evening peak windows

Self-consumption

Use your own clean power 24/7 instead of selling back at low rates.

Demand-charge cutting

Trim commercial peak-demand spikes that drive 30–60% of the bill.

Get a free quote

Outage backup

Time-of-use arbitrage

Self-consumption

Demand-charge cutting

Large flat-roof systems with minimal operational disruption.

Get a free quote

Compare

Two batteries we trust.

Tesla Powerwall 3

Enphase IQ Battery 10C

Usable capacity

13.5 kWh

10.0 kWh

Usable capacity

13.5 kWh

10.0 kWh

Usable capacity

13.5 kWh

10.0 kWh

Continuous power

11.5 kW

7.08 kW

Continuous power

11.5 kW

7.08 kW

Continuous power

11.5 kW

7.08 kW

Round-trip efficiency

89%

96%

Round-trip efficiency

89%

96%

Round-trip efficiency

89%

96%

Warranty

10 yr

15 yr

Warranty

10 yr

15 yr

Warranty

10 yr

15 yr

Stackable

Up to

4 units

Modular per

3.5 kWh

Stackable

Up to

4 units

Modular per

3.5 kWh

Stackable

Up to

4 units

Modular per

3.5 kWh

Installed price

from

$14,200

from

$11,800

Installed price

from

$14,200

from

$11,800

Installed price

from

$14,200

from

$11,800

Sample backup profile

One Powerwall, ~
12 hours of backup.

One Powerwall,~
12 hours of backup.

A single 13.5 kWh battery typically backs up fridge, internet, lights, well pump and a heat-pump for half a day. Add a second for full-home backup.

13.5 kWh

Usable storage

Technician working on a home electrical box

11.5 kW

Continuous output

$14.2k

Installed cost

Operation and maintenance at a solar plant

$4.3k

30% federal credit

13.5 kWh

Usable storage

11.5 kW

Continuous output

$14.2k

Installed cost

$4.3k

30% federal credit

The next ice-storm outage hit and we didn't notice for two hours. The app told us before the lights ever flickered.

Dev P.

Coastview homeowner · 7.2 kW + 13.5 kWh

“

The next ice-storm outage hit and we didn't notice for two hours. The app told us before the lights ever flickered.

Dev P.

Coastview homeowner · 7.2 kW + 13.5 kWh

“

The next ice-storm outage hit and we didn't notice for two hours. The app told us before the lights ever flickered.

Dev P.

Coastview homeowner · 7.2 kW + 13.5 kWh

“

battery FAQ

Sharp questions deserve sharp answers.

battery FAQ

Sharp questions deserve sharp answers.

Can I add a battery later?

Yes — we design every solar system to be battery-ready, so adding storage in year two or five is straightforward.

Will it back up my whole house?

What's the lifespan?

Power that doesn’t blink.

Four problems batteries solve.

Outage backup

Time-of-use arbitrage

Self-consumption

Demand-charge cutting

Outage backup

Time-of-use arbitrage

Self-consumption

Demand-charge cutting

Outage backup

Time-of-use arbitrage

Self-consumption

Demand-charge cutting

Two batteries we trust.

One Powerwall, ~12 hours of backup.

One Powerwall,~12 hours of backup.

The next ice-storm outage hit and we didn't notice for two hours. The app told us before the lights ever flickered.

Sharp questions deserve sharp answers.

Sharp questions deserve sharp answers.

One Powerwall, ~
12 hours of backup.

One Powerwall,~
12 hours of backup.