RES Solar & Roofing
RES Solar & RoofingRI · MA · CT solar installer
Services/solar

Battery Storage

Tesla Powerwall 3 — backup + bill management

Keep the lights on during outages. Use stored solar at night to dodge peak rates.

Tesla Powerwall 3 is what we install today: 13.5 kWh of capacity, 11.5 kW continuous output, integrated solar inverter (no separate inverter needed), and the Tesla app for monitoring and mode control.

Pricing is $1,075/kWh installed — so a single Powerwall 3 lands around $14,500 before federal incentives. Battery storage qualifies for the 30% federal tax credit on its own, even without paired solar.

We can size 1–4 Powerwalls depending on what you want to back up: just essentials (one), most of the house (two), or the whole house including HVAC and EV charging (three to four).

How it works

01

Backup planning

We sit down with you and decide what circuits you actually need to keep alive — fridge + lights + furnace fan, or whole-home.

02

Sizing

Based on backup goals + your daily kWh usage, we pick 1–4 Powerwalls and design the load center transitions.

03

Install

Powerwall 3 is wall-mounted indoor or outdoor. Most installs are 1 day; complex critical-loads panels add a day.

04

Commissioning

We configure modes (backup-only, time-based-control for ToU rates, self-consumption) and walk you through the app.

Common questions

Get a quote for battery storage

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