Solar Panel Installation in Cedar Mill, Oregon
Cedar Mill is an unincorporated community of about 17,000 people spread over three and a third square miles north of the Sunset Highway, between Portland and Beaverton. It takes its name from a sawmill that cut western redcedar on Cedar Mill Creek from the 1850s until 1891; today it is a settled residential suburb with a library, park district trails and a short stretch of shops along Cornell Road.
Solar here is rarely limited by the roof. It is limited by the electrical panel — and by how much load the household is about to add to it.
The Panel Is Usually the Bottleneck
Cedar Mill households are electrifying faster than most: heat pumps replacing furnaces, induction replacing gas, one EV in the driveway and often a second one being discussed. Each of those is a substantial new circuit, and a solar array wants a breaker of its own at the same panel.
A 200-amp service handles a great deal, but it is not infinite, and the answer is not guesswork — it is a load calculation. Done properly it tells you whether you need a service upgrade or whether you do not, and the difference between those two answers is thousands of dollars.
Where the calculation is tight, there are usually options short of a full service upgrade: load-management devices that prevent two large loads running simultaneously, a smart panel, or connecting the array on the supply side. We work through those before quoting an upgrade, because an installer who reaches straight for a bigger service is not always doing you a favour.
Size for the House You Are About to Have
The common mistake here is sizing a system against last year’s bill. If your house still burns gas for heat, hot water and cooking, that bill describes a household that is about to stop existing. Replace the furnace with a heat pump and add an EV, and electricity consumption can rise sharply while the gas bill disappears.
So we ask what is planned, not just what is installed. A system sized to a gas-heated 2025 baseline will look undersized by 2028, and adding to an array afterwards costs more per watt than building it right the first time.
The Order That Saves Money
- Load calculation first — it decides everything downstream and costs almost nothing
- Service and panel decision second — upgrade, manage, or leave alone, with the numbers in front of you
- Big circuits third — EV charger and heat pump, run while the walls and panel are already open
- Solar fourth, sized against the new baseline rather than the old bill
- Battery last, once a year of real data shows what it would actually be covering
Done in that order, each step informs the next. Done backwards — which is how it usually happens — you pay twice for the panel work and end up with an array sized for a house you no longer live in.
One Practical Note on Permits
Cedar Mill is unincorporated, so most addresses here are permitted through Washington County rather than Beaverton or Portland, whatever the mailing address suggests. We confirm the review authority for your parcel and handle the paperwork.
What We Install in Cedar Mill
- Rooftop solar sized against planned as well as current loads
- Electrical load calculations, panel and service upgrades
- EV chargers, including second-vehicle capacity planning
- Battery storage
- Repairs, monitoring and maintenance on existing arrays
Areas We Serve Near Cedar Mill
- Beaverton — immediately south across the highway
- Hillsboro — west along the corridor
- Tigard — south, and Portland east over the hill
- The wider Oregon service guide
Get a Free Cedar Mill Solar Quote
Call 360-313-7190 or request a free quote. We will measure the roof properly and give you a firm number.
Cedar Mill Solar FAQs
Do I need a service upgrade to add solar and an EV charger?
Sometimes, and a load calculation is what tells you rather than a rule of thumb. Where the numbers are tight there are often cheaper routes — load-management devices, a smart panel, or a supply-side connection — which we look at before quoting a service upgrade.
Should I install solar before or after replacing my gas furnace?
Do the load calculation first, then the big circuits, then the solar. Sizing an array against a gas-heated bill produces a system that is too small within a couple of years, and adding to an existing array costs more per watt than building it correctly once.
I might get a second EV. Does that change the design?
Yes, both the array size and the panel capacity. Two chargers is a serious load, and planning for it now is far cheaper than reworking the service later. Tell us what is likely, not just what is certain.
Who issues the permit for a Cedar Mill address?
Usually Washington County, because Cedar Mill is unincorporated despite a Portland or Beaverton mailing address. We confirm the authority for your specific parcel and pull the permits ourselves.