Tesla Review 2026
Tesla manufactures 3 models across solar panels & batteries. Efficiency range 15.5%–15.5%.
Headquartered in United States · Manufacturing in United States
Founded 2003 by Martin Eberhard, Marc Tarpenning · Headquartered in Austin, Texas, United States
Parent company: Tesla, Inc. (Tesla Energy division)
Listed: NASDAQ:TSLA
Tesla at a glance
Certifications: UL 9540 · UL 9540A · IEC 62619 · NEC 706
Warranty: 10-yr product · 10-yr performance
Key milestones
- 2003 Tesla Motors founded
- 2015 Powerwall 1 launched
- 2016 Powerwall 2 launched (DC-coupled)
- 2023 Powerwall 3 launched with integrated solar inverter
Source: www.tesla.com/powerwall · Last updated 2026-05-27
Tesla Pros & Cons (data-driven)
+ Pros
- ✓ Average product warranty 25yr exceeds industry baseline 12yr
- ✓ US manufacturing available (Buy American / domestic content benefits)
- ✓ Battery round-trip efficiency averages 93.8% (above industry 90%)
- ✓ 100% of SKUs triple-verified against manufacturer datasheets
− Cons
- ✗ Average panel efficiency 15.5% trails industry baseline 21%
- ✗ Weaker heat tolerance (-0.4%/°C vs industry -0.32%/°C)
Pros and cons calculated against industry baselines: 21% panel efficiency, 12yr panel warranty, -0.32%/°C temp coeff, 90% battery RTE.
Current Tesla Product List (3)
Solar Panels (1)
| Model | Wattage | Efficiency | Warranty | Verified | Score | Details |
|---|---|---|---|---|---|---|
| Solar Roof Tile | 71.67W | 15.5% | 25/25 yr | ✓ | 70 (B) | View → |
Batteries (2)
| Model | Capacity | Power | Chemistry | Warranty | Verified | Details |
|---|---|---|---|---|---|---|
| Powerwall 3 | 13.5 kWh | 11.5 kW | LFP | 10 yr | ✓ | View → |
| Powerwall 2 | 13.5 kWh | 5 kW | NMC | 10 yr | ✓ | View → |
Spec Sheet Downloads
3 manufacturer-published datasheets available for Tesla products. All links go to the official PDF on the manufacturer's website.
- PDF Tesla Solar Roof Tile datasheet →https://energylibrary.tesla.com/docs/Public/Solar/Roof/Datasheet/SR72T3R/SRSAUL2/en-us.pdf
- PDF Tesla Powerwall 3 datasheet →https://energylibrary.tesla.com/docs/Public/EnergyStorage/Powerwall/3/Datasheet/en-us/Powerwall-3-Datasheet.pdf
- PDF Tesla Powerwall 2 datasheet →https://energylibrary.tesla.com/docs/Public/EnergyStorage/Powerwall/2/Datasheet/en-us/Powerwall-2-Datasheet.pdf
Recent Tesla News
SolarSpec does not republish third-party news. For the latest Tesla news — product launches, financial filings, recalls, supply-chain updates — search Google News directly.
Search Tesla news on Google News →Related Brands
Brands with comparable SolarSpec scores in similar product categories.
Frequently Asked Questions
What is the SolarSpec Score for Tesla?
Tesla earns a SolarSpec Score of 80/100 (Grade B+) based on the weighted average of all 3 models in their 2026 lineup. The score combines efficiency, warranty, temperature coefficient, and verification status. See our /methodology/ page for the full formula.
How many solar products does Tesla offer in 2026?
Tesla offers 3 products in their 2026 lineup: 1 solar panels, and 2 batteries.
What is the most efficient Tesla solar panel?
The most efficient Tesla solar panel is the Solar Roof Tile at 15.5% efficiency with 71.67W output. Tesla panels range from 15.5% to 15.5% efficiency across 1 model.
What warranty does Tesla offer on solar panels?
Tesla offers up to 25-year product warranty and up to 25-year performance warranty. Average annual degradation across the lineup is 0.6%.
Where are Tesla solar panels manufactured?
Tesla solar panels are manufactured in United States.
Where can I download Tesla datasheets?
We have direct manufacturer-published datasheet links for 3 of 3 Tesla products. See the Spec Sheet Downloads section below for direct PDF links.
How we score brands
Every Tesla model in our catalog is scored 0-100 using a transparent formula: efficiency (25 pts), product warranty (20 pts), performance warranty bonus (3 pts), temperature coefficient (12 pts), and datasheet verification (5 pts), on a 50-point baseline. The brand-level score is the simple average across all 3 models.
Read the full SolarSpec methodology →