Vancouver Island’s BC Hydro grid is a known hazard during winter storm season. The Mid-Island and Gulf Island corridors lose power multiple times most winters, sometimes for extended periods. South Island and Greater Victoria are more resilient but still exposed. For luxury custom homes, a standby generator has moved from “nice to have” to essentially standard scope — and Kohler is the brand we’ve installed across three generations of Vancouver Island work.
Why Kohler
Wenner has been installing Kohler residential and commercial standby generators across Vancouver Island for decades. The reasons we keep coming back to the line:
- Proven reliability in the Vancouver Island climate, with regular winter exercise cycles built into the install
- Quiet operation — Kohler’s sound-attenuated enclosures are meaningfully quieter than competitor generators at the same load rating
- Automatic transfer switch compatibility — the ATS detects grid loss, signals the generator to start, swaps the home onto generator power within 10-15 seconds, and reverses when grid returns. Wenner integrates the ATS into the Crestron or Lutron platform so the homeowner sees runtime, fuel level, and current power source on the same interface as the rest of the home.
- Service and parts availability locally — same team installs, same team services, same parts catalogue
Sizing — whole-home vs critical-load
The first decision on every generator project: do you want whole-home coverage, or just the critical loads?
Whole-home coverage on a 5,000-10,000 sq ft luxury build typically requires a 30-48 kW Kohler. Everything in the home keeps running during the outage — HVAC, refrigeration, lighting, audio-video, networking, security, electric vehicle charger (load-managed), kitchen appliances. The homeowner experience is essentially “what outage?”
Critical-load coverage (HVAC, refrigeration, lighting circuits, network, security, plus essential power outlets) typically requires 14-22 kW. Lower fuel burn during long outages, smaller enclosure, lower install cost. The trade-off is the homeowner has to manage which loads matter during an extended outage.
Most luxury Vancouver Island builds end up specifying whole-home; most secondary residences and smaller homes end up specifying critical-load. We assess on a site visit.
Fuel — natural gas vs propane
Natural gas is the cleaner spec where municipal gas is available — urban Victoria, urban Nanaimo, parts of the West Shore. No tank to maintain, no fuel deliveries, indefinite runtime as long as the gas line is intact.
Propane is the standard on Gulf Islands, rural Vancouver Island, and Mid-Island acreages without natural gas service. Above-ground or buried tank sized to the runtime requirement. A 1,000-gallon tank typically delivers 7-10 days of whole-home runtime depending on load. Tank refills coordinated with a local propane supplier.
Automatic transfer switch + integration
Every Kohler install includes an automatic transfer switch. The ATS:
- Detects grid loss within milliseconds
- Signals the generator to start (typical start time: 10-15 seconds)
- Swaps the home onto generator power
- Monitors grid return and reverses automatically once stable
- Logs every event for the homeowner and the WennerCare service team
Wenner brings the ATS onto the Crestron or Lutron platform. The homeowner sees:
- Current power source (grid vs generator)
- Generator runtime (this outage and lifetime)
- Fuel level (propane tank or natural-gas pressure)
- Next scheduled exercise run
- Any active fault codes
One interface, with the rest of the home automation.
What it costs on Vancouver Island
A Kohler residential standby generator with automatic transfer switch typically lands:
- 14 kW critical-load Kohler — $15,000–$25,000+ installed (including ATS, sound enclosure, fuel routing)
- 22-26 kW Kohler — $20,000–$32,000+ installed
- 30-38 kW whole-home Kohler — $25,000–$40,000+ installed
- 48 kW estate-class Kohler — $35,000–$50,000+ installed
Larger estates with multi-building coverage, propane-tank installations, or significant electrical service upgrades run higher. Quote depends on the property — we assess on a site visit.
Service and maintenance
Generators that aren’t exercised under load are the ones that fail to start during the storm. Every Wenner-installed generator goes onto a WennerCare service plan that includes:
- Annual maintenance visit — oil, filters, battery, load test
- Remote monitoring of runtime and fault codes — we catch issues before the homeowner notices
- Same-day response on active fault events
- Propane refill coordination with the local fuel supplier on rural properties
On battery storage and solar
Battery storage and solar PV are part of the broader Vancouver Island backup-power conversation but aren’t Wenner’s primary practice. Where they’re part of a project’s brief:
- Battery storage — we install Enphase IQ Battery systems on selected projects where they’re the right fit, though it’s not our primary practice. Solar PV array installation itself is delivered by specialist solar partners; we handle the design coordination and integration into the home automation platform.
- Combined battery + generator — we coordinate the transfer-switch logic and bring both onto one interface so the home behaves as a single coordinated power system, regardless of which source is active.
For most Vancouver Island homes, the practical answer to extended outages is a Kohler generator. Battery storage extends the everyday comfort during shorter outages; solar generates power year-round; the generator is the final backstop when the conditions go long.
When to specify a generator
At schematic. Generator location, fuel routing, automatic transfer switch placement, and electrical service sizing all need to be on the architectural drawings before framing. Retrofitting into an existing home is workable but adds significant cost — longer fuel runs, possible electrical service upgrade, and the architectural impact of finding a suitable enclosure location.
Next step
Book a Centre Visit — talk to the team about your property’s outage exposure and resilience priorities.
See also: the Standby Generators service page and A comprehensive guide to the average cost of installing and maintaining a standby generator.