Solar in the Pacific Northwest — Yes, It Works
The Pacific Northwest gets less direct sun than Arizona, but RV solar still makes excellent sense here. Even on cloudy days, modern panels generate usable power — enough to maintain batteries during storage, run lights and water pumps for dry camping weekends, and significantly extend the time between generator runs. The key is proper system sizing: a system designed for Northwest conditions rather than desert assumptions will meet realistic expectations and deliver reliable power year-round.
Services We Provide
1 System Design & Sizing
We start with your actual power usage — what appliances you run, how often, and how long. We calculate daily amp-hour consumption and size the panel array and battery bank to meet that demand with a realistic margin for cloudy Northwest days. A properly sized system avoids the two most common solar complaints: not enough power, or paying for capacity you never use.
2 Rooftop Panel Installation
We mount rigid panels to the roof using non-penetrating Z-bracket mounts or through-bolt mounts with properly sealed entry points. Panel placement accounts for shade from AC units, antennas, and vent covers. We route wiring through the roof with sealed entry plates — never through a window or door — to prevent water entry. All roof penetrations are sealed with lap sealant and butyl tape.
3 Charge Controller Installation
We install MPPT (Maximum Power Point Tracking) charge controllers that extract up to 30% more energy from panels than basic PWM controllers — a significant advantage in the Pacific Northwest's lower light conditions. The controller is mounted inside the RV with proper ventilation and wired with correctly sized cabling and appropriate fuse protection.
4 Battery Bank Integration
Solar works with your existing battery bank, but upgrading to lithium (LiFePO4) batteries dramatically increases usable capacity and charge acceptance rate. We integrate solar with both lead-acid and lithium battery banks, configure charge profiles, and wire monitoring systems so you can see real-time production, consumption, and battery state of charge.
5 Portable Panel Setup
For RV owners who prefer not to permanently mount panels, we set up portable panel systems with ground-mount stands, extension cables, and quick-connect plugs at the battery compartment. Portable panels can be positioned in sunlight while the RV sits in shade — an advantage in campgrounds with tree cover.
Frequently Asked Questions
How many solar panels do I need on my RV?
That depends entirely on your power consumption. A weekend dry camper who runs lights, a water pump, and charges phones might need 200-400 watts. A full-timer running a residential refrigerator off an inverter might need 800-1200 watts plus a lithium battery bank. We calculate your actual daily usage and size the system to match — not a generic recommendation.
Does solar work in the Pacific Northwest's cloudy weather?
Yes, but with realistic expectations. A 400-watt panel array in western Washington produces roughly 1,000-1,600 watt-hours per day averaged across the year — less in winter, more in summer. That is enough to maintain batteries during storage, run basic 12V systems for weekend camping, and significantly reduce generator runtime. We size systems for Northwest conditions, not Arizona sun.
Should I upgrade to lithium batteries with solar?
Lithium batteries (LiFePO4) pair extremely well with solar because they accept charge faster, provide more usable capacity (you can use 80-100% of rated capacity vs. 50% for lead-acid), weigh less, and last 5-10 times longer. The upfront cost is higher, but the lifetime cost per cycle is lower. We install both lead-acid and lithium systems based on your budget and usage.
Will solar panels damage my RV roof?
Not when properly installed. We use mounting methods appropriate for your roof type — non-penetrating adhesive mounts for rubber roofs, Z-bracket mounts with sealed through-bolts for fiberglass and aluminum. Every roof penetration is sealed with lap sealant and butyl tape. We inspect the mounting area for structural adequacy before installation.
Can I add solar to an RV that was not pre-wired for it?
Yes. Most RVs can accommodate solar regardless of pre-wiring. We run new wiring from the roof through a sealed entry plate to the charge controller location inside the RV, then from the controller to the battery bank. Pre-wired RVs are faster to install, but non-pre-wired RVs are fully compatible with clean, professional installations.