Regent5 plans high-capacity electrical service for large Northern California homes and estates, including load studies, 400A through 1000A+ service strategies, switchgear, utility coordination, transformers, underground service, electrification and resilient power.
The correct service size is determined by the actual project loads: HVAC, heat pumps, EV charging, pool equipment, electric heaters, kitchens, elevators, workshops, lighting and technology. Regent5 begins with a load calculation and a service design rather than choosing an amperage by house size alone. Services above 800 amps are typically three-phase and CT-metered, and depend on what the utility can deliver to the site.
As capacity grows, service equipment, metering, switchgear, fault-current considerations, utility engineering and site requirements become more complex. The service architecture must be matched to the property’s calculated demand and what the serving utility can actually support.
Large residential services can require distribution and metering arrangements that resemble light commercial work. Regent5 coordinates service equipment, switchgear, CT metering where required, downstream panels and electrical rooms around the architecture and utility requirements.
Requested capacity is not the same as available capacity. The serving utility determines transformer, routing, metering and other utility-side conditions after engineering review. Those constraints should be understood before customer-side switchgear and site construction are finalized.
Estate electrification can add substantial coincident loads. EV charging, heat pumps, pools, spas, exterior heaters and future equipment should be modeled before service and switchgear decisions are locked. Load management can reduce peaks, but it must be part of the electrical design.
High-capacity service and backup power should be coordinated as one electrical architecture. Critical loads, battery capacity, generator interfaces, transfer equipment, solar interconnection and load-management priorities all affect how the estate behaves during an outage.
Regent5 coordinates with the serving utility for each project. PG&E, municipal utilities and other providers can have different service, metering, transformer and engineering processes, so the design must follow the actual utility serving the property.
Large residential services require the utility interface, metering, switchgear, downstream distribution and future electrification plan to be resolved as one electrical system. Regent5 coordinates those decisions from load study through commissioning.
Calculated demand, future loads and diversity evaluated before service capacity is selected.
High-capacity residential service planning for substantial custom homes and electrified remodels.
Larger service architectures for estates with multiple buildings, major HVAC, pools, EV charging and other high-demand loads.
Estate-scale service planning where metering, switchgear, utility infrastructure and site requirements become significantly more complex.
Main service equipment, feeders, subpanels and electrical rooms organized for capacity, fault-current requirements and long-term serviceability.
Current-transformer metering coordinated where required by the serving utility and service configuration.
Available capacity, transformer needs, routing and utility-side requirements coordinated before customer-side equipment is finalized.
EV charging, heat pumps, electric cooking, pools, exterior heating and future loads incorporated into the service model.
Controllable loads prioritized or staged where appropriate to manage peak demand and preserve electrical headroom.
Batteries, generators, solar, transfer equipment and critical-load distribution coordinated with the high-capacity service architecture.
Where we work.
Regent5 plans high-capacity residential electrical service across San Francisco, the Peninsula, South Bay, East Bay, Marin, Wine Country and the Monterey Peninsula. Each project is coordinated around its serving utility, site conditions, calculated loads and long-term electrification strategy.
The service size should come from calculated demand, future electrification plans, distribution design and what the serving utility can support. The goal is enough capacity and flexibility for the property without oversizing unnecessarily.
Yes. Very large estates can reach that range when multiple buildings, extensive HVAC, pools, EV charging, electric cooking, exterior heating and other high-power loads are combined. The final configuration still depends on engineering and utility availability.
Additional panels distribute power inside the property; they do not increase the capacity of the utility service feeding it. High-capacity projects require the service entrance, metering, switchgear, feeders and distribution architecture to be engineered together.
Some higher-capacity services use current-transformer metering rather than a conventional self-contained meter. The serving utility determines the applicable metering requirements.
Often the service equipment and distribution architecture change as capacity increases, but the exact switchgear depends on the service configuration, metering, fault-current requirements, utility interface and how power is distributed across the property.
The project may require a different service strategy or utility-side work such as transformer, routing or distribution changes. The utility review should be understood before customer-side equipment and construction sequencing are finalized.
Yes. Large load increases can affect the transformer and utility-side infrastructure serving the site. Whether transformer work is required is determined through the serving utility’s engineering review.
Most residential projects remain single phase, while certain equipment or project conditions can make three-phase power worth evaluating. The decision should be based on actual loads, equipment requirements and utility availability.
Sometimes. Managed EV charging, batteries and other controllable loads can reduce simultaneous peak demand. The strategy must still be supported by the electrical design, applicable code, equipment requirements and the serving utility’s rules.
Include them in the load model before service and switchgear decisions are locked. Charger count, HVAC electrification, pool and spa equipment, exterior heaters and future loads can materially change service sizing and feeder capacity.
Backup power should be coordinated with the service architecture, critical-load priorities, transfer equipment and load-management strategy. Large estates often benefit from separating essential and discretionary loads instead of trying to back up every circuit at full demand.
Ideally during design development, before service size, meter and switchgear locations, transformer assumptions, trench routes and major equipment loads are fixed.
.svg)
© 2026 Regent5, LLC. CSLB C10 & C7 License 1033103.