pv.index – June 2025

Trina takes the lead, battery trends revealed

sun.store kicks off Q3 with expanded insights and a new battery section

As Europe’s largest PV marketplace, sun.store continues to lead the way in market transparency and data-driven insights. With 30,000 registered users, more than 1 GW of components traded, and a GMV milestone of €100M reached in just over a year, sun.store has become a go-to resource for price benchmarks and purchasing trends in solar.

This edition of the PV Index marks a special milestone: the halfway point of 2025. It’s also the most comprehensive yet. In addition to our monthly pricing update and PV PMI, we’re introducing a brand-new battery section, featuring average €/kWh pricing and best-selling brands across two key categories.

June recap: prices mostly stable, but brand rankings shift

Solar panels

Module prices eased slightly across all categories:

• Monofacial N-type: average market price reached €0.097/Wp, reflecting a 3% decrease month-on-month.
  
• Monofacial P-type: dropped by 3% to €0.083/Wp.
  
• Bifacial N-type: fell by 3% to €0.101/Wp.
  
• Full Black modules: saw a moderate 1% decline to €0.102/Wp.

Despite the moderate drop in prices, a major shake-up occurred in brand rankings. For the first time this year, Trina Solar claimed the top position among solar panel brands, thanks to improved availability of residential models across Europe:

Top 5 solar panel brands – June 2025

1. Trina (up from 4th)
2. Jinko
3. JA Solar
4. LONGi
5. Aiko

“We’ve observed shifting preferences due to stock availability and delivery times. Trina’s supply chain responsiveness in Europe appears to have made a difference this month.”
– Filip Kierzkowski, Head of Partnerships and Trading, sun.store

Inverters 

Inverter prices continued to decline slightly in most segments:

Hybrid 

<15kW: down by 3% to €106.96/kW

>15kW: dropped to €82.14/kW, also a 3% decrease

On-grid 

<15kW: fell by 4% to €50.22/Wp>15kW: held steady at €24.32/Wp

Top 5 hybrid inverter brands – June 2025

1. Deye (consistent leader)
2. Huawei (up from 3rd, boosted by the new MAP0 model)
3. Sungrow
4. GoodWe
5. Fronius

Top 5 on-grid inverter brands – June 2025

1. Huawei (still #1)
2. SMA (strong growth, back in 2nd for third month running)
3. Sungrow (remains in the top tier since January)
4. SolarEdge
5. Fronius

“Top-tier inverter brands remain stable, but we’re seeing meaningful upward movement from Huawei and SMA in their respective categories.”
— Filip Kierzkowski

New! Battery pricing & brand trends

For the first time, we’re including detailed insights into battery storage trends on sun.store – offering a clear view of pricing and brand performance across the European market. Based on sales data from January to June 2025, this section highlights two distinct segments within the battery category:

• Performance Line: systems with an average price below €250/kWh, including popular brands such as Deye, Dyness, Growatt, and Pylontech.
• Premium Line: premium solutions priced above €250/kWh, represented by brands like BYD, Huawei, SolarEdge, and Sungrow.

This segmentation allows us to reflect actual market dynamics more accurately, without skewing average prices due to differing product tiers.

Battery prices

Performance Line

Prices for mid-range battery systems remained relatively stable in the first half of the year. After a slight downward trend in Q1 – reaching a low of €159.1/kWh in April – prices began rising again in May and June. By June 2025, the average price had returned to €165.5/kWh, marking a 3% month-over-month increase. This rebound reflects healthier demand and narrowing stock levels following last year’s oversupply.

Premium LinePremium battery models saw a steady price climb throughout the first half of the year. From €288.6/kWh in January, the average price increased almost every month, landing at €316.2/kWh in June. The 1% rise in June continues this upward trajectory, pointing to stable demand for high-quality storage solutions across residential and commercial segments.

Top 5 battery brands – June 2025

1. Huawei – now leading the segment after a steady climb
2. Dyness – previously the frontrunner, now in 2nd position
3. Deye – consistently strong among performance brands
4. Sungrow – maintaining a presence in both premium and hybrid categories
5. Pylontech – reliable and accessible option for installers

“Demand remains solid, but availability now plays a larger role in determining monthly rankings. Dyness, for example, remains highly popular, but limited stock may have impacted June sales.”

— Filip Kierzkowski, Head of Partnerships and Trading, sun.store

PV PMI: Sentiment softens slightly to 68

The PV Purchasing Managers’ Index (PMI) dipped slightly to 68 in June, down from 70 in May, reflecting cautious optimism amid mid-year market adjustments. Out of 908 sun.store users surveyed:

• 49% plan to increase purchases
• 38% will maintain current levels
• 13% expect to reduce orders

The market continues to show resilience, driven by EU renewable targets and residential interest, but buyers are taking a more measured approach amid ongoing grid delays, price sensitivity, and macroeconomic uncertainty.

*Calculated as PMI = (P1 * 1) + (P2 * 0.5) + (P3 * 0)—where P1 is improvement, P2 no change, and P3 deterioration—this score highlights a market adapting to supply constraints while gearing up for peak installation season.

Outlook: What to expect in Q3

With H1 behind us, market participants are adjusting to the new rhythm of 2025: stable but selective growth, cautious restocking, and a more strategic approach to procurement. Panel prices are softening, inverter deals remain attractive, and batteries – though stabilizing in price – show clear segmentation between value and premium tiers.As competition intensifies and summer installations peak, staying ahead means acting on fresh, verified data. sun.store remains your source for actionable insights and top-shelf component availability.

About – pv.index & The PV Purchasing Managers’ Index (PV PMI) 

pv.index tracks monthly trading prices for solar components, based on data from sun.store, Europe’s largest online PV trading platform with over 8.9 GW of components available. Prices are weighted by transaction power to provide a reliable market estimate.

Methodology of Most popular brands: The Top 5 rankings below are based on sales value data from the sun.store platform, collected between January and May 2025. These are sun.store’s own sales data, drawn from transactions made directly on our platform. We identified the five best-selling brands (by transaction value) in each of the following categories: solar panels, hybrid inverters, and on-grid inverters. We monitor the PV market closely and will regularly review these rankings to ensure they reflect the most accurate and up-to-date view of industry trends.

The PV PMI gauges demand sentiment in the PV industry, with scores above 50 indicating expansion. It’s calculated from a sample of 900+ sun.store buyers, offering a snapshot of purchasing intentions across Europe.

The PV PMI was calculated as: PMI = (P1 * 1) + (P2 * 0.5) + (P3 * 0), where: P1 = percentage of answers reporting an improvement, P2 = percentage of answers reporting no change, P3 = percentage of answers reporting a deterioration. Survey is based on a sample of 950+ sun.store buyers.