Battery Energy Storage Systems (BESS) have become a critical part of modern energy infrastructure as utilities and hyperscalers face growing power demands and grid challenges. By 2026, the U.S. is expected to add 24 GW of utility-scale battery capacity, addressing the variability of renewable energy and the massive energy needs of AI-driven data centers. BESS projects require specialized contractors with expertise in battery management systems, high-voltage integration, and precise commissioning to meet tight timelines and avoid costly failures.
Key takeaways:
Selecting the right contractor, aligning workforce planning with project timelines, and understanding regulatory requirements are essential for successful BESS deployment.
Building a utility-scale Battery Energy Storage System (BESS) involves far more than just placing battery containers on a foundation. These projects rely on an intricate setup that includes lithium-ion modules, DC-to-AC inverters, transformers, and a sophisticated control system. The control system integrates the Battery Management System (BMS), Energy Management System (EMS), and SCADA, which ensures real-time communication with the grid [6][1]. If any of these systems are improperly configured or poorly integrated, it can lead to degraded performance or even safety shutdowns.
The site design process requires meticulous planning to address spatial and safety considerations. For instance, a utility-scale BESS typically needs 200 to 500 square feet per megawatt-hour of capacity [9]. To reduce fire risks, a 3-foot setback between battery containers is mandatory [6]. Other factors like drainage, proximity to substations, emergency access, and perimeter security must also be carefully managed. Unexpected subsurface conditions, such as buried utilities or unstable soil, can disrupt schedules and budgets with last-minute change orders [1].
Safety measures are a top priority, especially for fire and explosion risks. Modern BESS facilities are equipped with advanced systems like aspirating smoke detection (VESDA), hydrogen and carbon monoxide gas sensors, and Thermal Runaway Propagation Prevention (TRPP) [6]. Explosion control systems must adhere to NFPA 68 and NFPA 69 standards, ensuring gas concentrations stay below 25% of the lower flammable limit [7]. These technical requirements highlight the need for specialized contractors who understand the unique challenges of BESS projects.
As the complexity of BESS projects grows, so do the regulatory and interconnection challenges. The updated NFPA 855 standard has removed energy capacity exemptions, meaning that nearly all electrochemical storage projects now require a Hazard Mitigation Analysis (HMA). This analysis must be overseen by a Registered Design Professional with specialized training in energy storage hazards [6].
"The 2026 Edition of NFPA 855 eliminates energy capacity exemptions, making formal Hazard Mitigation Analysis (HMA) and UL 9540A large‑scale fire testing mandatory for virtually all Battery Energy Storage Systems (BESS)." - Elevation Proving Grounds [6]
UL 9540A fire testing data is now essential for determining explosive and toxic gas thresholds during the design phase [6]. Contractors must rely on engineers skilled in fire dynamics modeling tools like PyroSim (FDS) and Pathfinder to meet these requirements. On the interconnection side, large transmission-connected systems must comply with IEEE 2800, while distribution-connected projects follow IEEE 1547 [7]. Additionally, projects with a nameplate capacity of 20 MVA or higher at 60 kV or above must meet NERC registration requirements [8].
A utility-scale BESS project unfolds in several stages: site preparation, foundation construction, equipment installation, grid interconnection, and commissioning. Each phase depends on the timely completion of the previous one, and delays can ripple through the entire schedule. Precision and discipline are essential to meet the strict safety and performance standards these projects demand.
One of the most significant challenges is managing equipment lead times. Battery modules typically take 26–52 weeks to procure, while transformers and switchgear can take 40–60 weeks - or even up to 18–36 months for some transformers [2][10]. To avoid delays, many contractors treat the procurement window as an opportunity to complete all civil work, foundations, and underground conduit installations. This way, equipment can be installed as soon as it arrives [10]. For instance, Crusoe Energy implemented this strategy in early 2026 by pre-ordering large volumes of transformers and switchgear while also producing its own switchgear to maintain an 18-month deployment cycle [5].
Foundation design is another critical aspect, as a standard 20-foot battery container can weigh over 50,000 lbs [10]. Simple point-load footings are often insufficient, so more robust solutions like steel piles, support beams, or continuous footings are used to prevent differential settlement. Precast concrete foundations are becoming increasingly popular because they can be fabricated off-site during the battery procurement period and installed quickly - saving valuable time on projects with tight deadlines [10].
Once the equipment is in place, commissioning becomes a pivotal step. This phase includes thorough testing of fire suppression systems, thermal runaway protocols, and the integration of BMS, EMS, and SCADA systems to ensure the facility operates safely and efficiently in the long term.
BESS Project Delivery Models: EPC vs. Multi-Contracting vs. Hybrid Compared
When it comes to Battery Energy Storage System (BESS) projects, choosing the right contracting model is a key decision. Each model comes with its own benefits and challenges, particularly when it comes to managing risks and costs. For example, the traditional EPC (Engineering, Procurement, and Construction) model combines all project phases under one contract. This approach is ideal for utility owners who prefer to minimize risk, but it often comes at a higher overall cost. On the other hand, a multi-contracting model allows the owner to contract separately with a BESS supplier and a Balance of Plant (BoP) contractor. While this can reduce costs by 5–12% for projects in the 20–100 MWh range [11], it also shifts more responsibility for managing project interfaces to the owner.
A hybrid approach merges the benefits of an integrated BESS system with a local BoP contractor, striking a balance between cost savings and risk management. Ultimately, the choice of model should align with the owner’s risk tolerance, project management capacity, and the scale of the project.
| Delivery Model | Risk to Owner | Total Project Cost | Best For |
|---|---|---|---|
| Traditional EPC | Low | Highest | Risk-averse owners [11] |
| Integrated EPC | Low–Medium | Medium | Standardized sites; fastest delivery [11] |
| Multi-Contracting | Medium | Lowest | Cost-optimized IPPs [11] |
| Hybrid Model | Medium | Lower | Repeatable models across geographies [11] |
Once a contracting model is selected, the contractor’s technical expertise becomes the next critical factor.
BESS projects demand contractors with in-depth technical knowledge and hands-on experience. Beyond standard electrical work, they must be skilled in managing high-voltage power systems. This includes expertise in areas like fault behavior, arc-flash mitigation, grounding, harmonic control, and utility protection schemes - spanning distribution to transmission voltages as high as 765 kV [12].
System integration is another key consideration. Contractors must have a proven ability to connect Battery Management Systems (BMS), Power Conversion Systems (PCS), and Energy Management Systems (EMS) to existing utility SCADA systems and communication protocols [12][11]. A contractor who can handle the physical installation but lacks integration skills could jeopardize the project.
Track record matters, too. For instance, Knobelsdorff (KE) has successfully connected over 2 GW of load and generation to the grid. Their expertise in high-energy power systems and substations underscores their capabilities:
"BESS projects live in the same world as substations, industrial facilities, and high-energy power systems. That world is our home." [12]
Look for contractors who can demonstrate successful, large-scale project completions rather than just theoretical knowledge.
Technical expertise alone isn’t enough - strong safety and risk management practices are equally important. A robust BESS safety program should go beyond meeting OSHA standards to include compliance with NFPA 855, NFPA 68/69, and UL 9540A fire testing requirements [6]. With the 2026 edition of NFPA 855 removing energy capacity exemptions, staying updated on these standards is critical [6]. Additionally, the team should include a Registered Design Professional trained in energy storage hazards, as this is a compliance necessity no contractor can afford to ignore.
Supply chain reliability is another crucial factor. For example, one contractor demonstrated exceptional agility by securing an alternative supplier within just 10 days during a critical project phase [3][4]. This quick action not only kept the project on track but also allowed it to reach substantial completion nearly a month ahead of schedule. Such responsiveness can make all the difference in high-stakes projects.
When assessing contractors, ask about their plans for managing vendor risks. A solid alternative supplier strategy is a strong indicator of their ability to handle unexpected challenges.
Staffing plays a vital role in the success of large-scale Battery Energy Storage System (BESS) projects. These initiatives demand professionals with both construction and energy sector expertise. Workforce shortages are already causing delays in over 53 GW of storage-paired projects [13]. Below, we’ll examine the critical roles, hiring hurdles, and strategies that shape workforce planning for such projects.
A strong BESS project team requires expertise across various disciplines. Here’s a breakdown of the essential positions and their responsibilities:
Each of these roles contributes to ensuring that BESS projects meet grid reliability and performance standards.
The BESS sector, valued at $40 billion, is growing at an annual rate of 32% in operating capacity [13]. However, this rapid growth has driven up labor costs in the U.S. battery sector by 43% [13]. Top candidates, such as Commissioning Engineers and BESS Project Managers, are often hired within 14–21 days [13], making speed a critical factor in recruitment.
Here’s a look at salary benchmarks for key roles:
| Role | Salary Range | Key Skill Premium |
|---|---|---|
| BESS Project Manager | $110,000 – $160,000 | Interconnection Queue Management |
| Regulatory/FEOC Specialist | $120,000 – $170,000 | Supply Chain Auditing |
| Solutions Architect | $118,000 – $184,000 | AI/VPP Integration |
| Commissioning Engineer | $85,000 – $115,000 | NFPA 855 Compliance |
| BESS Performance Analyst | $105,000 – $145,000 | Predictive Degradation Modeling |
Source: [13]
Given the competitive hiring landscape, a recruitment process that exceeds 21 days risks losing top talent. To stay ahead, streamline interviews to under 21 days and prioritize candidates with direct experience in 1500V systems and inverter integration. Use situational questions to evaluate their ability to manage risks like thermal runaway and fire suppression.
A proactive recruitment strategy is key to addressing these challenges.
Approximately 85% of applicants for specialized BESS roles are screened out due to insufficient qualifications [15]. iRecruit.co has developed a rigorous screening process to identify candidates with direct experience in grid, generation, and regulated delivery environments [14]. Their approach matches candidates to specific delivery models - whether EPC-led, utility-driven, or owner-representative - tailored to the risk profile of each project [14].
For utilities and hyperscalers managing multi-site or phased BESS programs, maintaining consistency in hiring is just as important as filling individual roles. As iRecruit.co puts it:
"Mission-critical isn't a marketing word - it's a description of what the build cannot afford to get wrong." - iRecruit.co [15]
Senior roles often require a 90+ day time-to-fill and demand a 6–12 month lead time before project mobilization [15]. Planning your talent strategy around these timelines, rather than reacting to them, ensures smoother project delivery and keeps large-scale BESS programs on track.
The way you structure contracts plays a big role in determining costs, timelines, and risks. Here’s a breakdown of three common models:
Let’s compare these models side by side:
| Criteria | Traditional EPC | Integrated EPC | Multi-Contracting |
|---|---|---|---|
| Risk to Owner | Low | Low–Medium | Medium |
| Total Project Cost | Highest | Medium | Lowest |
| Delivery Speed | Standard | Fastest | Variable |
| Flexibility | Low | Low | High |
Source: [11]
The hybrid model is becoming increasingly popular for program planning. A real-world example involved a 5 MWh system delivered six weeks ahead of schedule and 10% under the original EPC bid. This was achieved by completing foundation work before the equipment even arrived [11].
"This hybrid approach combines the reliability of a fully engineered BESS system with the flexibility of local EPC execution - removing cost without adding unmanaged risk." - Ang Li, CEO, FFD POWER [11]
One key to making the hybrid model work is clearly defining the responsibilities of the BESS supplier and the BOP contractor. Failing to set clear boundaries often leads to delays during commissioning [11].
A single BESS project is manageable as a standalone construction effort, but scaling to a portfolio of projects requires a different strategy. One-off projects offer room for custom designs and flexible contracting, but they don’t scale well. Each new site comes with a fresh set of challenges, from permitting to commissioning.
Programmatic approaches, on the other hand, focus on standardization and multi-site frameworks. These methods streamline delivery timelines across multiple projects. Manufacturer-led models are particularly effective here since they use consistent equipment configurations and replicable commissioning processes [11].
For organizations like utilities or hyperscalers with a pipeline of projects, programmatic models are essential. Take Lydian Energy, for example. In February 2026, they financed a 150 MW / 733 MWh BESS alongside two utility-scale solar projects. For them, standardization was the only way to scale efficiently without ballooning overhead costs. By using consistent designs, they reduced per-site risks, sped up procurement, and made workforce planning more predictable.
To make this approach work, a strategic staffing plan must complement the standardization process.
The delivery model you choose directly impacts how and when you hire. For example, an EPC-led program will have different staffing needs compared to a multi-contracting approach. Effective staffing isn’t just about filling roles - it’s about timing those hires to match the project’s critical path.
Senior leadership roles, such as Project Directors, MEP leads, and Commissioning Managers, often require 90+ days to fill. To stay ahead, these positions should be sourced 6 to 12 months before mobilization [15]. Interconnection Engineers are another priority, as they’re in high demand due to RTO/ISO queue backlogs. Additionally, key BESS roles typically command a 25–30% wage premium over standard commercial construction jobs [15]. These factors need to be baked into the budget from the outset.
For multi-site programs, companies like iRecruit.co specialize in energy infrastructure recruitment. They match candidates to specific delivery models - whether EPC-led, utility-driven, or owner-representative - based on the project’s risk profile. Aligning your hiring strategy with your program structure is essential to avoid last-minute scrambles to fill critical positions, which could derail timelines.
Building a Battery Energy Storage System (BESS) requires a level of precision that goes far beyond standard commercial construction projects. With the U.S. projected to install 93 GW of utility-scale storage in the next five years [1], success in this rapidly growing market depends on meticulous attention to detail from preconstruction all the way through commissioning.
The difference between a successful BESS program and one plagued by delays often comes down to expertise. Contractors with hands-on experience in areas like protection coordination, thermal management, and OEM commissioning consistently outperform those without specialized knowledge. Preconstruction planning is just as critical as field execution. As Chris Lomibao, VP of Engineering at TruGrid, highlighted:
"I saw projects get delayed six weeks because of a protection coordination gap that a better-qualified EOR would have caught in design." [17]
For large-scale power and energy infrastructure projects, staffing is just as crucial as the delivery model. With 85% of applicants for specialized mission-critical roles disqualified based on qualifications alone [15], and senior positions taking over 90 days to fill, waiting until mobilization to hire can lead to significant delays. The 25–30% wage premium required for skilled BESS professionals must be factored into budgets from the outset [15]. This emphasizes the importance of integrating workforce planning into the overall project strategy.
Beyond hiring, aligning your project delivery strategy is a must. For utilities and hyperscalers, combining proactive workforce planning with well-defined contracting models is the key to success. Securing your Engineer of Record (EOR) early in the process - before major design decisions are finalized - and sourcing senior leadership 6 to 12 months before breaking ground can make all the difference. Danielle Pirrone, President and COO of ULE Group, put it succinctly:
"Contractors need to know how the system is expected to come online, not only how the equipment is put in place." [16]
Whether you're managing a single site or a portfolio of projects, mastering three core fundamentals is essential: clear interface definitions, experienced field leadership, and a hiring strategy aligned with your critical path. Nail these three elements, and you'll lay the groundwork for a successful BESS program.
Your decision hinges on your comfort with risk, technical know-how, and financial resources. EPC (Engineering, Procurement, and Construction) is ideal for those who prefer minimizing risk, as it provides a single point of responsibility - though it often comes with a higher price tag. Integrated EPC offers quicker project completion for standardized sites but may limit flexibility due to vendor lock-in. On the other hand, the hybrid approach, which separates the Battery Energy Storage System (BESS) supply from local Balance of Plant (BOP) construction, is a favored option for those seeking a balance between cost control and technical accountability.
When it comes to commissioning Battery Energy Storage Systems (BESS) and connecting them to the grid, the most pressing risks stem from organizational and procedural missteps. These challenges can significantly impact project timelines, budgets, and safety standards. Here's a closer look at the key issues:
Addressing these risks early with proper planning, thorough compliance checks, and effective communication can make a significant difference in the success of a BESS project.
To keep your BESS project on track, it's crucial to assemble your project team long before contracts are finalized or construction kicks off - ideally months or even years ahead. With labor shortages and a growing demand for specialized roles like project managers and safety experts, waiting until the last minute to hire can lead to delays. Instead, focus on creating a pool of pre-qualified candidates early on and ensure your staffing plan aligns with procurement timelines. This proactive approach helps you sidestep costly downtime and keeps the project moving smoothly.
