SMSSolar Maintenance Solutions
Certified Tesla Installer · 260+ Powerwalls Serviced

Tesla Powerwall Maintenance UK

We're a certified Tesla installer servicing the 260+ Powerwalls we've fitted across the M6 corridor — plus any third-party Powerwall in our coverage area. Annual electrical checks, Storm Watch verification, firmware audits, and direct access to Tesla's service console for warranty claims.

What's covered

Annual Powerwall service

01

Annual electrical safety check

PIR-style inspection of consumer unit tie-in, isolators, AC and DC cabling, Gateway connections.

02

Storm Watch verification

Confirm Storm Watch is enabled and the system is reaching a 100% state of charge ahead of forecasted storms via the Tesla app.

03

State of Health (SoH) audit

Pull the latest SoH from the Tesla service console. Flag if approaching 70% retained capacity (warranty trigger threshold).

04

Firmware update verification

Confirm latest firmware applied. Tesla pushes major updates roughly quarterly; battery owners sometimes have updates pending due to weak Wi-Fi.

05

Time-of-use schedule audit

Compare your current Octopus tariff (Flux/Go/Cosy) against the Powerwall TOU schedule. Mis-aligned schedules can cost £200–£400/year.

06

Backup gateway inspection

For systems with whole-home backup gateway: verify auto-switching <20ms, test transfer to backup loads, confirm alerts route to your phone.

07

App + monitoring health

Check the Tesla app shows live data with no gaps. Investigate any data outages — usually a firmware re-handshake.

08

Warranty file refresh

Update install records with Tesla so any warranty claim is processed without delay.

Pricing

£149

per year, standalone

Or bundle with full home solar maintenance for £249/year — covers Powerwall + solar + EV charger annual checks, plus 48-hour fault response SLA.

FAQs

Powerwall maintenance questions

Does Tesla Powerwall need maintenance?
Lightly. The battery itself has no moving parts and is sealed. But the surrounding install (electrical tie-in, gateway, app monitoring, firmware) benefits from an annual professional check — and required for Tesla's 10-year warranty in some scenarios.
What's the warranty?
10 years to 70% retained capacity. Tesla requires the unit to remain registered to the original install address. Moving the unit voids warranty unless re-registered through a Tesla certified installer (we are).
Can SMS service my Powerwall if you didn't install it?
Yes — about 25% of our Powerwall maintenance work is on units installed by other companies (some now defunct). We have direct access to the Tesla service console as a certified installer.
How much does annual Powerwall maintenance cost?
£149 standalone. Free if bundled with a wider solar maintenance contract (£249/year for solar + Powerwall + EV charger).
What if my Powerwall has degraded below 70%?
Tesla replaces under warranty (within 10 years from install). We file the warranty claim and coordinate replacement — typically 4–6 weeks Tesla turnaround.
Storm Watch saved my fridge — but it didn't fire on the last storm. Why?
Common cause: the gateway lost cellular comms with Tesla's Met Office API feed. Diagnostic visit gets it back online; sometimes a firmware push fixes it remotely. Annual checks catch this before the next storm.

Book your Powerwall service

2-week scheduling typical. We service systems we didn't install. Direct Tesla service console access for warranty claims.

Book a Service Call 0800 099 6606
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