Is a battery worth adding to your solar system?

A direct decision tool comparing storage with grid exports — without hiding when the battery does not pay for itself.

1. Where do you live?

We use INPE's solar atlas (2017) to know how much sun hits your roof.

State

Municipality

Grab a recent bill: entering amount and consumption makes the estimate much more accurate.

Average amount (R$/month)

Consumption (kWh/month)

Service type (on the bill)

Single-phaseTwo-phaseThree-phase

Not sure? Most homes are two-phase.

Electric utility

Usable capacity is the energy the battery can actually deliver. Price should include the battery, hybrid inverter, design and installation.

Usable capacity (kWh)

Accepted range: 1–100 kWh.

Installed price per usable kWh

Adjust between R$2,500 and R$5,000/kWh · R$ 3.000/kWh

Estimated installed cost: R$ 15.000

Tariff type

ConventionalDischarge valued at the full tariff.Time-of-useDischarge valued at the peak tariff entered.

Instant result, no signup.