MULTI-BUILDING SOLAR + MICROGRID / ST. HELENA / IN PROGRESS
HELENA VIÑEDO: SOLAR + MICROGRID INTEGRATION.
A multi-building solar, storage and advanced microgrid integration project in St. Helena, California combining distributed photovoltaic generation, generator integration and intelligent power controls across a complex property.
HELENA VIÑEDO / ST. HELENA, CALIFORNIA / PROJECT IN PROGRESS
PROJECT
ESTATE MICROGRID
Multi-building renewable energy infrastructure
PLANNED SOLAR
121.88 kW DC
277 Hyundai 440 W modules · Rev A design
DESIGNED STORAGE
417 kWh
Pylontech BESS with Dynapower 125 kVA PCS
LOCATION
ST. HELENA
California · Napa Valley
01 / THE PROJECT
ONE ESTATE. MULTIPLE ENERGY SYSTEMS. ONE INTEGRATED STRATEGY.
Helena Viñedo brings together generation, energy storage and sophisticated electrical controls across multiple structures. A long-term estate construction program requires coordinated system design, evolving building schedules, utility interconnection, and reliable integration with existing electrical infrastructure.
The stamped September 9, 2026 Revision A drawings specify 121.88 kW DC and 125 kW AC photovoltaic capacity, paired with a planned 417 kWh battery energy storage system. Grid Titans' contracted scope includes microgrid and PV design, utility interconnection, permitting, procurement, phased PV construction, controls installation and commissioning across the barn, accessory structures and main residence.
02 / DESIGN & TECHNICAL SYSTEMS& DELIVERY
DESIGNED FOR INTEGRATED RESILIENCE.
01 / SYSTEM
MULTI-BUILDING PV
277 HD Hyundai 440 W modules in distributed roof arrays, using SMA three-phase string inverters and site-specific racking.
02 / SYSTEM
BATTERY ENERGY STORAGE
417 kWh Pylontech Optim USL417 battery block and Dynapower MPS-125 inverter specified in the stamped design.
03 / SYSTEM
MICROGRID CONTROLS
Ageto ARC controller, load-shedding equipment, remote monitoring and SEL-751 feeder protection coordinate energy assets.
04 / SYSTEM
GENERATOR & UTILITY
Integration with existing generator and PG&E grid infrastructure, including protection, interconnection and commissioning.
03 / PHASED DELIVERY
BUILT AROUND THE PROJECT TIMELINE.
The executed subcontract organizes the project into engineering and interconnection, phased microgrid controls and PV construction, progressive system integration, testing and owner handover. Installation sequencing must coordinate with ongoing construction at the barn and primary residence.
PROJECT SCOPE: Planned work includes system engineering, microgrid controller installation, solar PV across multiple structures, equipment protection, controls wiring, utility coordination, and commissioning.
System capacities reflect the stamped September 2026 design and contracted scope, not a statement that the system is completed, energized or operating. Final equipment and performance may change with approved revisions.
04 / Project execution
Coordinated across every phase.
Multi-building energy projects demand a practical construction sequence. Grid Titans' contracted scope brings together electrical engineering, controls, solar generation, utility coordination and project delivery as the wider estate construction progresses.
01 / ENGINEERING
System design & approvals
PV, battery and microgrid electrical design; drawings, equipment coordination, permitting and utility interconnection.
02 / CONTROLS
Microgrid foundation
ARC microgrid controller, protective relays, load-shedding equipment, switching and control infrastructure.
03 / GENERATION
Distributed solar
Phased rooftop PV across the barn, accessory structures and main residence, integrated into estate power distribution.
04 / HANDOVER
Commission & close out
Testing, commissioning, utility PTO coordination, project documentation and owner orientation as authorized phases complete.
Construction photography is being prepared from the Helena Viñedo project archive. This page describes planned and contracted work and does not claim the entire system has been completed or commissioned.
05 / ACTUAL CONSTRUCTION PHOTOGRAPHY
Progress on the ground.
Helena Viñedo building construction project in progress
Additional project photography will be added as solar, energy storage and microgrid installation progresses.
GRID TITANS / ADVANCED ENERGY INFRASTRUCTURE
LET'S BUILD WHAT'S NEXT.
Discuss advanced solar, battery energy storage and microgrid project opportunities with Grid Titans.
