Tesla (TSLA) Stock Climbs as Model Y and Model 3 Lead UK Electric Vehicle Sales in 2025

TLDR

• Tesla’s Model Y and Model 3 are the top two best-selling electric vehicles in the UK for 2025 with 18,890 and 16,361 units sold respectively
• Tesla stock jumped 3.7% to $484.70 after announcing a $1.2 billion investment in battery cell production at its German gigafactory
• The German facility will produce up to 8 gigawatt hours of battery cells annually starting in 2027
• Tesla’s UK market share dropped to 9.6% in 2025 from 13.2% in 2024, with total sales down about 8,000 units from last year’s 50,090
• The stock is approaching key resistance at $500 with RSI readings nearing overbought territory at 70

Tesla stock climbed 3.7% to $484.70 on December 19, driven by news of a major European manufacturing expansion. The automaker announced it will invest $1.2 billion in battery cell production at its Grünheide gigafactory in Germany.

Tesla, Inc., TSLA

The facility will produce up to 8 gigawatt hours of battery cells annually when production begins in 2027. This capacity is designed to support local EV assembly and reduce dependence on external cell suppliers.

Tesla described the investment as “another three-digit million amount” into the battery segment. Combined with earlier funding, the total commitment to cell production at the German plant reaches nearly €1 billion.

The company acknowledged that producing cells economically in Europe is challenging under current conditions. However, favorable regulatory and market support could make a fully domestic battery value chain viable.

Technical Picture Points to Key Resistance Level

Tesla stock is now approaching short-term resistance just below the $500 psychological level. The $490 to $500 range represents a known congestion zone from historical price action.

A clean break above $500 would mark the highest level since late 2021. This would confirm a new bullish leg and likely trigger momentum-driven buying.

The 50-day simple moving average currently sits around $239, far below current levels. The 200-day SMA is near $234, underscoring the long-term trend reversal that began in late October.

This wide gap between price and key averages indicates the stock may be extended in the short term. The position makes it potentially vulnerable to profit-taking.

Trading volume has picked up during this rally, with activity more than 25% above the 30-day average. Increased participation suggests strong institutional interest behind the move.

Sustained high volume near resistance will determine whether Tesla can establish a new price base above $500. However, Relative Strength Index readings are approaching the 70 threshold.

UK Market Shows Mixed Results for Tesla

Tesla’s Model Y and Model 3 dominated UK electric vehicle sales in 2025. The Model Y leads with 18,890 units sold, while the Model 3 follows with 16,361 units.

The next best-selling EV is the Audi Q4 e-tron at 10,287 units. This trails the Tesla models by a wide margin.

Both Tesla vehicles will see decreases compared to 2024 performance. The Model Y sold 32,610 units in the UK last year as the best-selling car overall.

The Model 3 reached 17,272 units in 2024. This year’s sales will keep it roughly on par with last year’s total.

Tesla sold 50,090 units in the UK market in 2024. The company is about 8,000 units shy of last year’s pace with two weeks remaining in 2025.

Market share has also declined. Tesla held 13.2% of UK sales last year but currently sits at 9.6% in 2025.

The company still leads Volkswagen, which holds 8% market share. Some months showed stronger consumer demand than others throughout the year.

Sales jumped over 20% in February. A 14% increase followed in June, showing inconsistent momentum throughout the year.

The California DMV ruled that Tesla’s marketing of Autopilot and FSD features could mislead consumers. A 30-day sales license suspension is possible, though enforcement is on hold as Tesla updates its language and cooperates with regulators.

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