← Change solar system BATTERY ADD-ON · OTHER SOLAR SYSTEMS
Add Tesla storage to the solar you have. Start with a Powerwall 3 and an Expansion pack. Adjust your storage and explore monthly pricing. We’ll confirm the connection to your existing solar.
Your battery add-on Minimum package: one new Powerwall 3 plus one new Expansion pack. Existing batteries do not replace this minimum.
Existing solar / inverter system Choose your system Tesla Solar Inverter SolarEdge SMA Fronius Enphase Other / not sure Powerwall 3 can work alongside many existing solar inverters. Your existing solar inverter stays in place. We’ll confirm its model, solar size, metering and wiring for compatibility.
An Expansion pack adds storage; it does not add another battery inverter.
Existing solar & backup priorities Existing batteries No batteries yet I already have batteries Not sure Solar size in kW (if known) What would you like backed up? (optional)
YOUR TESLA BATTERY PLAN
1 Powerwall 3 + 1 Expansion pack TESLA PW3 TESLA EXP Illustration only · placement and connections confirmed on site 27 kWh nameplate storage
INSTALLED ESTIMATE · BEFORE TAX $24,875
First Powerwall 3 + standard retrofit installation $16,750
1 Expansion pack × $6,950 $6,950
Engineering & battery integration $1,175 Equipment compatibility and site scope confirmed before a final quote. Standard backup hardware, installation and engineering included. Existing solar inverter retained. Permit / utility fees and tax are separate.
What’s included / not included Included in this estimate Selected Powerwall 3 units, Expansion packs, mounting hardware and battery interconnect cables. Standard Tesla backup controls (gateway or backup switch as required), metering / CTs, disconnects, circuit protection and required battery shutdown components. Standard installation labor, wiring / conduit, electrical connection, setup, testing and commissioning on a compatible existing system. Existing solar inverter retained for an AC-coupled battery addition, subject to compatibility and site verification. $1,175 engineering & battery integration, charged once per Tesla add-on. Not included · separate if needed Permit, utility and application fees — charged separately. Sales tax and financing / lender fees. The monthly illustration shows financing charges separately from the installed estimate. Main-panel or utility-service upgrades, replacement or repair of the existing solar inverter, or removal / relocation of existing solar or batteries. Trenching, unusually long wire / conduit runs, nonstandard mounting, structural work or other site work beyond standard installation. New solar panels, generator supply or generator integration. A distance adder may apply to any quote. Any applicable travel charge will be explained before you approve the work.
Final equipment, existing-inverter compatibility, AC-coupled sizing, metering, backup circuits, placement and any site-specific charges are confirmed in your proposal before work is approved.
Additional Powerwall 3 units use the current $10,000 preliminary allowance per unit; confirmed in your proposal.
Expansion packs add storage, not another battery inverter. Nameplate storage is not a promise of outage runtime. No incentives or savings deducted.
Tesla existing-solar design guidance ↗ Monthly payment estimate $323/month estimated with $0 down; payments start after 6 months
7.47% interest with autopay · 120 monthly payments after 6 months without payments. Interest accrues during those first 6 months. Includes $1,375 in financed starting lender fees when borrowing.
Subject to lender approval and confirmation of battery-retrofit eligibility, dealer participation and final fees.
Payment preference, down payment & loan details
Down payment · $ Climate First battery-only illustration · 10½ years total. This is an estimate, not a loan approval. Generator-only projects require lender eligibility confirmation.
Installed estimate before tax $24,875
Down payment $0
Starting lender fees, financed $1,375
Initial amount financed $26,250
Interest during 6-month deferral $996
120 scheduled payments $38,758
Total including down payment $38,758 7.47% interest with autopay. The lender’s published 9.22% APR is based on a $50,000 example; your APR can differ. Starting lender fees of $1,375 are included in this illustration when a loan is needed; final and state-specific charges may differ. Interest is estimated using monthly compounding. No tax credits, incentives or savings are deducted.
Published terms checked October 21, 2026. Review lender terms ↗
Confirm my design & price Before quoting: verify existing inverter / AC-coupled solar sizing, any existing batteries, backup controls, service capacity and utility requirements.
Close × Request a Tesla battery add-on Your selected package, existing equipment and payment preference are included.
$24,875 before tax · 1 Powerwall 3 + 1 Expansion pack · 27 kWh nameplate
Existing solar / inverter: Not identified. Standard backup hardware, installation and engineering included. Existing solar inverter retained. Permit / utility fees and tax are separate.
