TWS Technology pitches BESS as exporters face Vietnam tariff changes and EU carbon rules

TWS Technology is urging manufacturers in Vietnam to pair solar with battery storage as new domestic time-of-use tariffs and Europe’s carbon border rules squeeze industrial power costs. The company says the shift could help exporters protect margins and keep access to EU buyers as CBAM enforcement tightens in 2026 and beyond.

Why it matters: - Vietnam exporters now face two cost pressures at once: a reworked local electricity tariff structure and the European Union’s carbon border rules. - TWS Technology says battery energy storage systems, or BESS, can help manufacturers keep production running while reducing exposure to carbon-linked import costs. - The issue matters most for factories selling into Europe, where uncertified emissions can directly affect pricing and market access.

What happened: - TWS Technology pointed to the July 8-9 Solar & Storage Live Vietnam 2026 exhibition in Ho Chi Minh City as the backdrop for its message. - The company said Vietnam’s Ministry of Industry and Trade has restructured the country’s time-of-use electricity framework under Decision No. 963/QD-BCT. - The revised tariff creates one continuous evening peak block from 17:30 to 22:30, Monday through Saturday. - TWS Technology also highlighted the EU’s Carbon Border Adjustment Mechanism, or CBAM, which entered its definitive phase on Jan. 1, 2026.

The details: - Under Vietnam’s previous tariff structure, industrial users had two separate peak-rate windows each day. - Under the new structure, storage systems that once could arbitrage two daily peaks now face a single peak window. - CBAM requires European importers to buy digital certificates tied to the greenhouse gases embedded in imported goods. - That shifts emissions reporting pressure onto overseas suppliers, including factories in Vietnam. - TWS Technology said standard grid power is difficult to verify as fully clean because national grids mix renewable and fossil generation. - The company said manufacturers seeking lower carbon tariffs need direct, traceable access to green power, ideally from on-site generation or a dedicated renewable connection. - TWS Technology said a BESS can store daytime solar output and release it during night production. - The company said that creates a more auditable supply of green power for exporters with evening or overnight operations. - In July 2026, the European Parliament’s Environment Committee voted 56 to 11 to support stronger CBAM enforcement, the company said. - TWS Technology also cited a June 12, 2026 EU Council General Approach agreement as clearing a major political hurdle. - The company said the Commission will monitor trade patterns and can penalize new evasion schemes within a three-month window. - TWS Technology said the anti-circumvention rules target slight processing, resource shuffling, parcel fragmentation and supply-chain shifting. - The current CBAM scope covers cement, iron and steel, aluminium, fertilisers, electricity and hydrogen. - The company said an expanded phase voted in July 2026 will bring 180 downstream product codes containing steel or aluminum into scope in 2028. - Those products include industrial hardware, machinery, automotive components, home appliances and heavy construction equipment. - TWS Technology used steel fasteners as a cost example. - The company cited an EFDA figure of €135.61 per ton as the punitive CBAM cost for steel fasteners exported without certified green energy documentation. - TWS Technology said its compliant case example lowers that figure to €51.84 per ton, creating a €83.77 per ton savings. - The company said the penalty can add about 10% to operating expenses and can wipe out competitiveness. - TWS Technology said failure to comply could push suppliers out of EU supply chains entirely.

Between the lines: - The pitch is less about a single tariff change and more about a broader shift in industrial power strategy. - For exporters, energy storage is being positioned as a compliance tool, not just a backup asset. - The message also suggests that solar alone may not be enough for factories running after sunset. - TWS Technology is linking local grid constraints in Vietnam with global emissions accounting rules to make the business case for BESS.

What's next: - TWS Technology says the 2026-2027 window gives manufacturers time to adjust power architecture before expanded downstream CBAM penalties take effect. - The company is offering modular storage cabinets and larger containerized systems for industrial use. - Its portfolio includes the TWS Max-Pro and TWS Max-Solaris at 125 kW / 262 kWh, the PowerM-Pro in 1000 kW / 2507 kWh and 1720 kW / 3343 kWh configurations, and the PowerCore at 5015 kWh. - TWS Technology also points to prior deployments in Hanoi, Quang Ninh, East China and Jiangsu as proof of industrial use cases.

The bottom line: - For Vietnamese manufacturers selling to Europe, the company’s core argument is straightforward: storage-plus-solar may now be a margin-protection strategy as much as an energy strategy.