Estate EV charging — 3 to 6 vehicles, properly orchestrated.
Marin estates with 3-6 vehicle garages face different EV charging challenges than typical homes — panel capacity, load orchestration, and aesthetic integration all matter. We've installed multi-charger systems across luxury Marin properties for years.
By Steven Lockhart · Reviewed by Alex Towery, C-10 #989290
Updated 2026-06-16
Estate-level EV charging (3-6 chargers) requires careful planning: panel capacity (often requires 400A service or sub-panel), load orchestration to share available power across chargers, aesthetic integration with garage finishes, and ongoing service. Typical Marin estate scope runs $12,000-$32,000 for full multi-charger systems.
01What estate EV charging involves.
Estate EV charging starts with capacity planning. Three or more Level 2 chargers at full rate can exceed even 400A service panels — orchestration is required to share available capacity across chargers based on what's actually charging at any moment. Modern load-sharing chargers (Tesla Wall Connector Gen 3, Wallbox Commander, ChargePoint Home Flex with sharing) handle this elegantly: when one or two vehicles are charging, they get full speed; when all 6 are plugged in, they share available amperage.
Beyond capacity: aesthetic integration matters in estate garages. Custom-finished garages don't tolerate visible conduit on the walls. We route conduit in-wall or in dedicated chases during construction; for finished garages, conduit hides in trim, behind cabinetry, or in wall channels. Outlets and chargers mount flush with the finished wall. The result looks integrated rather than retrofit.
02Typical estate scope and pricing.
| Scope | Typical Marin cost |
|---|---|
| 3 chargers, load sharing, 200A panel sufficient | $6,500-$10,500 |
| 4 chargers, load sharing, 200A or sub-panel work | $10,000-$16,000 |
| 6 chargers, load sharing, requires 400A service or sub-panel | $16,000-$28,000 |
| 6+ chargers with full 400A service upgrade | $28,000-$48,000 |
| Multi-building (main house + ADU + carriage house) | $32,000-$58,000 |
03What sets estate installs apart.
Aesthetic integration
In-wall conduit, flush-mount chargers, hidden distribution panels, finished cable management. Custom finish work coordinated with builder/designer. Adds 20-35% to install labor vs standard residential.
Load orchestration tuned for the household
Default load sharing splits amperage evenly across plugged-in vehicles. Estate installs often tune this — prioritize the daily driver, give guest vehicles slower charging, schedule overnight loads for off-peak rates. Setup takes 2-3 hours of configuration during commissioning.
Ongoing service relationship
Estate properties typically value an ongoing service relationship — semi-annual check-ins, firmware updates managed for the customer, any issues responded to within 24 hours. We offer service contracts for estate accounts that handle this systematically.
Common questions.
Can I really charge 6 EVs simultaneously at home?
Yes, with proper load orchestration. Six Level 2 chargers at full 48A each would require 288A of dedicated capacity — beyond most residential services. With load sharing, the 6 chargers split available amperage based on what's actually plugged in: when only 2 are charging, they share 240A circuit at 48A each (full speed); when all 6 are plugged in, they share at 40A each (still excellent charging speed). Most multi-EV households don't actually need all 6 charging simultaneously at full speed — overnight charging windows easily handle realistic usage patterns.
Does estate-scale charging need a 400A service?
Sometimes. A 200A service can support 3-4 chargers with load sharing if other household loads are typical. A 400A service is the right answer for 5-6 chargers, or for households with heat pump + multiple ovens + hot tub + EVs. We run detailed load calculations as part of estate quote — sometimes 400A is necessary, sometimes 200A with load sharing works fine. PG&E coordination for 400A service is involved (4-8 weeks) but routine.
Can I integrate EV charging with solar and battery storage?
Yes — estate-scale installs often integrate with solar PV and battery storage (Tesla Powerwall, Enphase IQ Battery, Sonnen). Smart load management routes solar production to EV chargers during the day, draws from battery during evening peak rates, and charges EVs from grid during overnight off-peak. Modern integration is straightforward if all components are from compatible ecosystems (Tesla solar + Powerwall + Wall Connector integrates natively; mixed brands require additional integration controllers).
Do you offer service contracts for ongoing charger management?
Yes, for estate-level accounts. Typical service contract includes semi-annual property visit (charger inspection, firmware updates, electrical safety check), priority response for any issues (24-hour response window typical), and annual electrical safety audit of the EV charging system. Cost ranges $1,200-$3,600/year depending on system scope and visit frequency. Most estate properties find ongoing service worth the investment for system reliability and discreet handling of issues.
How do you handle pricing — flat fee or hourly?
Both, depending on scope. Routine service calls and predictable scope (panel replacement, EV charger install, transfer switch install, fixture replacement) are flat-fee quoted up front. Diagnostic visits and emergency scope are hourly because we don't know what we'll find. Either way, you get a written quote before work starts on anything significant, and we don't proceed beyond the quote without your sign-off.
How quickly can you schedule?
Depends on scope and season. Emergency dispatch: same-day across Marin County (1-3 hours business hours, 1-4 hours after-hours). Same-day standard service: 3-6 hours from call when capacity allows; otherwise next business day. Scheduled service work: 1-3 weeks typical. Larger projects requiring permits and PG&E coordination: 4-12 weeks depending on scope. We're upfront about timeline at the quote stage.
What warranty do you offer on work?
Our standard residential warranty: 2 years on labor, manufacturer warranty on parts (varies by product — typically 1-10 years). Major installs (panels, generators, EV chargers) often have longer manufacturer warranties (5-10 years). If there's an issue with our work in the warranty period, we come back and fix it at no cost. We also stand behind work past warranty — repeat customers and referrals matter more than a transactional fix.
Are you licensed and insured?
Yes. California State License Board C-10 Electrical Contractor #989290, in good standing. Carry general liability insurance and workers' compensation insurance as required by California law. Bondable on projects requiring it. Happy to provide proof of insurance to clients or property managers on request. License lookup: cslb.ca.gov.
Talk to a licensed electrician in Marin.
Family-run, C-10 #989290, 20+ years in the trade. Honest scoping, fair pricing, work that lasts.