FrameAI BESS

IEEE 1547 / IEC 62933 / NFPA 855 BESS design —
sizing to commissioning in one place

Battery system sizing, thermal runaway analysis per UL 9540A, NFPA 855 compliance documentation, and IEEE 1547-2018 interconnection application packages for utility-scale and C&I BESS. FrameAI BESS handles the documentation — your team focuses on system integration.

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Individual tier: $45/month · $400/year

Standards Reference
IEEE 1547-2018
Interconnection and interoperability of distributed energy resources. Voltage reactive power, frequency-watt, volt-var response, trip settings, anti-islanding. UL 1741 SA certification requirements for grid interconnection.
IEC 62933-2-1
Battery energy storage system (BESS) — sizing methodology, performance characterization, round-trip efficiency, capacity rating, discharge duration at rated power. Grid-side and customer-side installation.
NFPA 855
Standard for installation of stationary energy storage systems. Separation distances, fire suppression, explosion control, clear access requirements, thermal runaway management, commissioning verification.
UL 9540A
Test method for evaluating thermal runaway propagation in BESS. Cell-level, module-level, unit-level, and installation-level testing requirements. Gap analysis for NFPA 855 separation distances.
IEC 61850-3
Communication networks in power utility automation — BESS plant controller communication, plant-level controller to grid-tie inverter protocol (Modbus TCP / IEC 61850 MMS), alarm and status mapping.
FERC Order 841
Electric storage participation in wholesale markets. State-of-charge management, market participation models (energy arbitrage, frequency regulation, capacity), interconnection queue position documentation.
What FrameAI BESS Delivers
Battery System Sizing — IEC 62933-2-1
Input your use case (peak shaving, energy arbitrage, frequency regulation, backup), daily energy throughput, DoD, cycle count target, and available footprint. FrameAI sizes string count, rack configuration, DC bus design, and thermal management (HVAC load, coolant flow) per IEC 62933-2-1.
Thermal Runaway Analysis
Cell chemistry, SOC, ambient temperature, cooling system parameters → thermal runaway risk assessment per UL 9540A. Module-level propagation modeling, spacing recommendations, gas venting calculations, fire suppression sizing.
Grid Interconnection Application
IEEE 1547-2018 response type selection, voltage-reactive power curve, frequency-watt parameters, trip settings. FrameAI generates the interconnection application package with single-line diagram, modeling data, and UL 1741 SA certification evidence.
NFPA 855 Compliance Documentation
Gap analysis against NFPA 855 requirements: separation distances, clear access widths, fire suppression system spec, explosion control, ESS location classification, emergency egress requirements. Generates AHJ submission package.
PCS / Inverter Sizing
AC power rating, DC/AC ratio, apparent power, reactive power capability → power conversion system specification. Grid-forming vs grid-following selection for microgrid vs utility-tie. Thermal derating curves, IEEE 1547 trip setting derivation from inverter capability curve.
Commissioning Checklist
Pre-commissioning, commissioning, and post-commissioning checklists per NFPA 855 §11 and IEEE 1547 §8. FrameAI generates the site acceptance test protocol, functional test sequences, performance acceptance criteria, and sign-off documentation for handover.
Free Public Calculators
🔋
Battery String Sizing Calculator
MWh target, cell voltage/capacity, series/parallel count → string count, rack capacity, DC bus current. Free, no account required.
FREE
📊
Round-Trip Efficiency Calculator
Cell efficiency, converter losses, thermal management consumption → system RTE %. Seasonal temperature correction included.
FREE
🔥
NFPA 855 Separation Distance
ESS rated energy, UL 9540A test result, installation level → minimum separation per NFPA 855 Table 45.2.3.1.
FREE
⚡
PCS Sizing Calculator
DC capacity, DC/AC ratio, reactive power requirement → inverter rating, apparent power, current. Grid-forming / grid-following suitability check.
FREE
5 hrs
saved per
BESS project
$100
BESS engineer
hourly rate
IEEE 1547
/ IEC 62933
/ NFPA 855

A BESS engineer charges $100/hr. Interconnection application packages, NFPA 855 gap analyses, and commissioning checklists are time-consuming but formulaic. FrameAI BESS handles the documentation so your engineers focus on system design.

Pricing
Free
$0
forever
  • ▸ 3 projects / month
  • ▸ All 4 free calculators
  • ▸ Watermarked output
  • ▸ No account required
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Pro
$45
/month
  • ▸ Unlimited projects
  • ▸ Battery system sizing
  • ▸ IEEE 1547 interconnection package
  • ▸ NFPA 855 compliance docs
  • ▸ Thermal runaway analysis
  • ▸ No watermark
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$400
/year · team
  • ▸ Everything in Pro
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