FFD POWER says 800V BESS can cut solar storage install costs

FFD POWER has released a European white paper arguing that 800V battery storage can connect directly to 800V solar plant buses, avoiding dedicated matching transformers and reducing installed costs. The company says the approach can save about EUR 80,000 to 150,000 per 1 MW site and is already in field use across Europe.

Why it matters: - 800V battery storage could lower the cost and complexity of adding storage to utility-scale and industrial solar plants. - FFD POWER says direct integration can remove a major equipment package, shorten schedules and reduce losses in 800V PV projects. - The company estimates the approach can improve project economics by cutting installed CAPEX by EUR 80,000 to 150,000 per 1 MW-class site.

What happened: - FFD POWER published a technical white paper for the European market on July 28, 2026. - The paper outlines how 800V battery energy storage systems can connect directly to an existing 800V solar collection bus before the medium-voltage step-up transformer. - The company says the architecture avoids the need for a dedicated voltage-matching transformer when storage is added to 800V solar plants.

The details: - Conventional 400V BESS setups need an extra matching transformer, plus switchgear, cabling, civil works and commissioning scope. - FFD POWER says that extra chain raises upfront capital costs, adds vendor interfaces, extends timelines and increases resistive losses. - The direct 800V approach halves line current at equal power compared with 400V systems, which can reduce conductor sizing, cable costs and transmission losses. - The architecture also reduces major equipment interfaces, civil works and commissioning steps. - Retrofit projects can keep the existing PV inverter architecture if the LV bus, transformer and protection systems have enough capacity. - The white paper says the savings from avoiding the BESS-side transformer package amount to EUR 80,000 to 150,000 of installed scope per 1 MW site.

Between the lines: - The paper is aimed at making 800V storage look easier to finance and permit, not just cheaper to build. - FFD POWER is positioning 800V direct integration as a standard design choice rather than a niche engineering workaround. - The compliance section suggests bankability remains a key hurdle, even when the hardware fit is straightforward. - CE marking alone does not equal grid connection approval, and the paper points to EN 50549-1/-2 and German VDE-AR-N 4105/4110/4120 standards.

What's next: - FFD POWER is offering project-specific reviews that include topology assessment, 400V vs. 800V CAPEX comparison, country compliance checklist and product configuration recommendations. - Developers, IPPs and EPC contractors can use the review to test technical feasibility and cost savings before design finalization. - The company expects the approach to support more fast, repeatable deployment of 800V solar-plus-storage projects across Europe.

The bottom line: - FFD POWER is betting that 800V solar plants will increasingly add storage without transformer-heavy integration, lowering costs and simplifying deployment. - The company says the concept is already proven in the field, with more than 300 Galaxy 418L units deployed across Europe, including a six-site solar-plus-storage portfolio in Ukraine. - Each site in that portfolio uses five Galaxy 418L cabinets for 1.05 MW / 2.09 MWh, connected directly to the 800V LV collection bus. - Across the full 6.30 MW / 12.54 MWh portfolio, FFD POWER says the architecture avoids an estimated EUR 480,000 to 900,000 of matching transformer installation scope. - The white paper highlights two platforms: Galaxy 418L, an outdoor cabinet with 210 kW PCS and 418 kWh capacity, and Galaxy 836L, a flexible 836 kWh platform with independent power and energy scaling for 2 to 12 hour discharge durations. - FFD POWER says Galaxy 418L is built for solar self-consumption, curtailment recovery and price arbitrage, while Galaxy 836L is designed for projects needing custom power-to-energy ratios, higher energy density or longer shifting windows. - The company describes itself as a provider of advanced battery energy storage solutions focused on 800V direct-integration BESS for solar-plus-storage applications. - FFD POWER says it has hundreds of units deployed across Europe.