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renogy solar panels

Powerful Solar Power Solution for your Small Travel Trailer

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Powerful Solar Power Solution for your Small Travel Trailer

After a year of trips with our Scamp 13’ (33 nights, 23 locations, 7 trips), we’ve gained a good understanding of how the trailer functions and which accessories provide added benefit.  Because our adventures often involve locations without electricity (such as some State and National parks and boondocking campsites), one excellent solution we implemented is a solar panel system.  The system ensures that our small travel trailer has the power needed to run the most essential functions (e.g. indoor LED lights, water pumps, heater, fans, and perhaps an electric tongue jack).  Most small travel trailers are powered by an on-board 12 Volt DC battery when off-grid or 110V AC onshore power when hooked up to a campsite’s electrical outlet (which is then converted to 12V DC).

The trailer’s battery is usually around 12.7 volts when fully charged and a good rule to ensure long battery life is to keep the trailer’s battery charge level above 12 volts (about 50% of its capacity).  A battery voltage meter should always be used to monitor the trailer’s battery voltage throughout each trip (we had Scamp install a SeeLevel II system when our 2020 Scamp 13’ was being built and Scamp now installs voltage monitors on its 2021 models).  There are aftermarket voltage monitors that simply plug into the 12 volt DC port in the trailer.  Here’s one with a BLUE display and here’s one with a RED display.

We’ve found that a basic 100W solar briefcase (two 50W solar panels which fold up on each other into a briefcase when not in use) is all that is necessary to provide enough power for essential systems in our Scamp 13’ (as long as the camper has sun exposure every few days).  The solar briefcase is nice because it is relatively light and can fit in the back of the tow vehicle when not in use.  We use an auxiliary battery power bank, a Jackery 500, for charging our phones, cameras, drone, and television when boondocking to reserve all of our Scamp’s 12V battery power for essential devices/functions.

The items needed to create a reliable solar system for your small travel trailer are:

  1. High quality 100W solar briefcase (monocrystalline)
  2. 2 pin waterproof male/female connector for the plastic battery box (houses the trailer battery)
  3. 20 foot solar extension cables
  4. 50 foot solar extension cables
  5. Solar crimper tool
  6. 12AWG (thickness) Wire (about 12 inches black / 12 inches red)
  7. Solar panel cable connectors
  8. Solar panel connector assembly tool
  9. Multi-meter Tester
  10. Portable Power Station

Update Sept. 2022:  after a few years, the bag that came with our solar panels split apart (it was always too small and difficult to deal with).  Here’s a much better bag!  Also, we’ve found having 50 foot cables which can extend the 20 foot cables to be a great option when the campsite is in shade most of the time and the longer cables can get the solar panels out into the sun!

Monocrystalline solar panels have the highest efficiency rates (more power per square foot) and perform best in low light conditions, so that’s the type we chose and we’ve been very pleased with the performance.  Make sure you choose a solar panel briefcase which comes with a charge controller.  The charge controller will keep your small travel trailer’s battery from overcharging.  On a recent trip to Joshua Tree National Park, we were down to 12.3 volts one morning.  As soon as the solar panels were plugged into the battery, the power registered 13.6 volts and maintained that steady voltage through most of the day.  When the solar panels were unplugged at sunset, the Scamp battery registered 12.7 volts (100% charge)!  We were staying at a Boondockers Welcome location without any hookups and relied on our Jackery 500 to charge our phones and other non-essential devices (including watching TV at night).  So, as long as there is sun every few days, the solar panel setup will keep the small travel trailer battery charged almost indefinitely!

Once you have the items needed to create your solar system, you will need to connect everything together.  Solar panel briefcases which come with charge controllers usually have a couple of metal clips on the end of each cable (black and red) which attach the solar panel cables directly to the small travel trailer battery (similar to the clips on car jumper cables, by clipping on to the red and black terminals of the battery).  Sometimes these clips are attached directly to the cables coming out of the solar controller and in other cases are separate and have connectors that plug into cable connectors coming out of the charge controller.  In any case, it is cumbersome to use the clips if your small travel battery is covered by a plastic housing box (like with our Scamp 13’).  We would have to take our plastic battery housing on and off each time we used the solar panels if we used the clips.  So, to make things easy, use a waterproof 2 pin male female connector port on the case.  Before installing onto the plastic battery case cover, some black and red 12AWG wires need to be soldered onto the inside port half, and ring terminals crimped onto the ends of the wires so they can connect to the trailer battery (Ring Terminal 12-10 Crimp Connectors, 5/16” Home Depot).  (If you are not familiar with soldering, either have a friend do it or hire an expert.  Otherwise, skip this step and just use the clips directly onto your battery terminals and omit the battery port.)  Once the inside port half has its cables, drill an appropriately sized hold in the plastic battery case cover and mount the port (the outside piece of the port screws into the inside piece to hold it in position on the case).  Then, screw down the ring terminals to the red and black battery terminals and close the battery housing box.  The last step is to solder the outside male connector (which plugs into the battery port) to the 20’ solar extension cables.

Depending on how the solar briefcase is configured, it might be beneficial to create two short cables (red/black) with the 12AWG wire and add MC4 connectors at the end which the 20’ solar extension cables can plug into (they should already have MC4 connectors on them, sometimes male on Black and female on Red).  Some solar briefcases are already configured with these short cables and connectors and it’s important to understand which connectors are male and which are female so they plug in appropriately.  Having short cables connected to the charge controller will allow the solar briefcase to be folded with the short cables still attached to the charge controller.  With this setup, all one needs to do when arriving at the campsite is open and position the solar panels, lay out the solar extension cable, and then join the connectors at the solar panels and plug the other end of the solar extension cable into the small travel trailer’s battery port.

It may be helpful to have a digital multimeter to check there is continuity from one end of the extension cables to the other and also to verify power is coming out of the extension cable at the male side of the port.  On my first attempt, no power was coming out of my extension cable.  So, I tested the continuity of the cable using the meter (makes a tone when the connection is continuous).  I found that one of the factory installed connectors wasn’t making a good connection and, after I reinstalled the connector, everything worked great!  You can also tell right away if your system is working just by checking your voltage.  If everything is good, the sun is out, and the panels are plugged into the system, the voltage will go up to the 13 voltage range right away (almost like the trailer is plugged into an electrical outlet).

Once you discover solar and how effective it is, you will never want to leave home without it!

Disclaimer:  You will get the same great Amazon price by clicking on the links here compared to buying directly on Amazon, but by buying here you will also be supporting the continuation of this website as we get a small commission from each sale.  These are products and procedures we use for our own Scamp that we selected and developed from our own research and experiences.  However, we do not endorse any specific product and cannot guarantee that the products we use are exemplary and the procedures we use are complete, accurate, detail the correct recommended procedures, or apply to your model small travel trailer.  It’s always best to double check with your manufacturer or operation manuals to ensure you are doing everything correctly. 

Coast Trip from San Diego to Coos Bay Oregon With Stops (10 Days)

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Coast Trip from San Diego to Coos Bay Oregon With Stops (10 Days)
October 18th – 28th 2020

Driving the iconic Highway 1 along the coast of California from San Diego to its northern border is a must adventure for anyone who enjoys beautiful views, sensational campgrounds, and excitement on many levels.  It’s not a drive for the faint of heart since there are long portions of very windy roads.  But, with a small travel trailer, it’s entirely manageable.   And, there are many different types of geography to explore and plenty of really nice state parks to make the trip enjoyable.  We decided that it would be a great addition to cross the border into Oregon and stay over in Coos Bay before heading back home.

We made reservations just a week before the trip and were lucky in finding site openings in wonderful state park campgrounds.  And every site we had was a really nice one.  It seems if one is flexible and can vary campground locations depending on availability then openings are more easily attained.  Our main goal was to get up the coast without driving more than 4 hours at a time and stopping at some key locations such as San Simeon, Santa Cruz, and the Redwoods.  We prefer to stay at state parks because the sites are often spread out and tend to be economical.  When planning our stay overs, we also consider our needs for dumping, water replenishment, and electricity demand.  We generally need to dump every few days, but can usually find dump stations at gas stations if they are not available at campsites (which they often are in at least a centralized dump station at the campground).

Our first stop was at my Uncle Mel’s house in Santa Barbara (about a 3 1/2 hour drive from San Diego).  We parked in the driveway on the quiet street and got set up with water and electricity.  We made some pasta for lunch in our Scamp and my cousin Melvin joined us.  We then enjoyed a stroll in Tucker’s Grove Park with my cousin Jon and his dog Charlie.  In the afternoon, we enjoyed sitting and admiring my Uncle Mel’s beautiful artwork in his backyard studio garden.  My cousins made a really nice family BBQ dinner in the backyard in the evening.  The next day we visited some of our family in the Santa Barbara cemetery (along with a family of foxes who live there).  After a really quiet and restful sleep, we left for Hearst San Simeon State Park in the morning.

Hearst San Simeon State Park, about a three hour drive from Santa Barbara, is an enjoyable campground above a beautiful beach (which is within walking distance).  We paid $43 for Site #17.  There are water spigots at the campground and a free central dump.  The cellphone service here is poor (Verizon).  However, we were able to pick up 9 channels of crystal clear high definition television signals (HDTV)!  We set up our briefcase solar panel on the picnic bench behind our Scamp and were able to charge up our batteries while out exploring.  Moonstone Beach is a fantastic location for beachcombing.  There are so many beautiful rocks on the sand, including the famous shimmering moonstones.  We were lucky enough to find a few.  California Jade and other rocks can also be collected on Moonstone Beach.  We just purchased a rock tumbler and are currently tumbling these tones, hoping to transform them into semi-precious jewels!  If you are lucky, you might also find a sand dollar on the beach (we did!).  We also visited Elephant Seal Beach which is close by and enjoyed viewing and listening to the hundreds of seals that migrate through here.

The next day, after about a two and a half hour drive north, we arrived at Henry Cowell Redwoods State Park (Santa Cruz).  We paid $43 for Site #27, which is a good and shady private site.  There are water spigots here but no dumps.  The cellphone service is poor (Verizon), but the HDTV is great since the campground is high up on a hill above downtown Santa Cruz.  There are really nice hikes at this campground, with one that leads up to an observation deck.  We were able to see deer, plenty of woodpeckers, beautiful redwoods, ocean views, and a nice sunset.  We drove down into town (about an 8 minute drive) and parked close to the Santa Cruz wharf.  We had a nice long walk to the end of the wharf and saw seals resting below on the wooden pilings.  The next morning, after a long hike and viewing the sites from the observation deck above the campground, we drove to the UC Santa Cruz campus (about 15 minute drive) and purchased a Slug t-shirt in their student store.  We also walked a bit on the campus which is like walking through the redwoods in a state park.

The next morning, we spent about four hours driving north to Van Damme State Park (Ft. Bragg).  We paid $48 for site #68 – a pleasant, private site (the meadow sites near #68 are also good).  There is no cellphone service here (Verizon) and no over the air HDTV.  There is a gas station very close by.  There are water spigots and a $10 dump site.  The area campsite was too shady for using our solar panel, but we had plenty of power to charge all our devices using our lithium powered Jackery 500 battery power bank!   There’s a nice long walk to a beautiful beach down below the campground.  We found abalone shells on the beach.  There are great hiking trails in the redwoods as well as an interesting pygmy forest hike close by.  We met some really friendly people at the campground and had a very relaxing stay here.

The next day we drove four hours north to reach Prairie Creek Redwoods State Park (located in Humbolt County near the town of Orick, about 50 miles north of Eureka).  The park is over 14,000 acres and is home to some very old giant Coast Redwoods.  There is a big meadow and you can sometimes see large Elk grazing (we did!).  This campground is about 1,500 feet above sea level and was a bit chilly when we visited in October (clear and sunny but in the 50’s during the day).  The chill gave us a chance to try out our gas powered Scamp furnace (which is very effective at quickly creating hot air and blowing it into the Scamp).  It doesn’t take long for the Scamp to get really toasty with the furnace running!  There is no dump here, but there are water spigots.  We paid $43 for site #49 which is nice and private (but too shady for solar panels).  We had no cellphone service (Verizon) here and couldn’t receive any over the air HDTV signals.  Our water bandit came in handy in filling up our water jug as the faucet sprayed too wildly for the stream to be contained and efficiently fill the jug.  The redwood hikes are spectacular with trees so huge they seem to be from fairy tales.  We watched a couple large bull Elks in the meadow in front of the visitor center for a couple of hours in the morning.  The visitor center is nice for souvenirs (I bought a cool hat that says Redwood National & State Parks and I purchased the Elk pin for the hat since we saw two big Elk!).  This park is a must visit.

The drive to Coos Bay, about four hours north along the Oregon coast from Prairie Creek Redwoods SP, is spectacular.  With huge rocks jutting out of the ocean along the rugged coastline, the views on this part of the journey are spectacular.  We parked for lunch at a beach rest stop in the Gold Beach area and had fantastic views right out of Scamp’s rear window.  Sunset Bay State Park (Coos Bay area, Oregon) is a wonderful campground with nice amenities.  We paid $45 / night for our full hookup site #D01 and stayed two nights (note:  we paid a 30% surcharge imposed on non-Oregon residents).  The site we had was an end spot and very quiet and there is good spacing between campsites here.  We had no cellphone service (Verizon) and no over the air HDTV reception.  However, there is an RV park close by and there is mobile data (Verizon) reception out in front.  The hosts at Sunset Bay SP are really friendly and spent a lot of time talking to us about the area.  There is a great beach within walking distance (a trail leads from the campground to the beach).  In addition, there is an awesome hike (about 2 miles each way) along the top of the bluffs to a state park called Shore Acres Botanical Gardens (it was originally an estate owned by a timber baron, but sold to the State of Oregon to use as a park in 1942).  There are a couple of homes on the property as well as wonderful gardens.  We met a nice couple from Salem, OR (Todd & Yvonne) who occupied the site next to ours and they recommended the botanical garden hike.  They were taking their first trip in their small Helio travel trailer and we enjoyed talking with them about all things small travel trailers!  We’ve kept in touch via email since coming home and learned we share many common interests.

It was nice having a small travel trailer on our journey because we often unhitched and were able to easily explore the areas with just our SUV.  We had a couple of such opportunities while in Oregon.  We drove about 20 minutes from Sunset Bay SP to visit the waterside town of Coos Bay and also the fishing town of Charleston (where we purchased some excellent teriyaki smoked steelhead trout which we had on our breakfast toast the next morning)!

Having completed our coastal adventure from San Diego to Coos Bay, OR, we opted to take the more direct way home via I-5 on an inland route.  We drove about 5 hours from Coos Bay, OR to Weed, California (Mt. Shasta area).  This was our first stop during the trip at a private RV park (places we tend to avoid).  The Friendly RV Park in Weed, CA, was actually very pleasant and not very crowded.  It’s a full hookup RV park that is close to the freeway but is not very noisy.  We paid $49 / night for Site #13 (a pull through full hookup site).  The WiFi was weak and we couldn’t get the cable TV to work.  We did have cellphone service (Verizon).  We were also advised not to use a hose because it would freeze overnight.  We used our internal boondocking water tank.  We kept our water heater and furnace on all night as a precaution and to keep warm as it was cold.  There is a limited view of Mt. Shasta behind the campground (I sent up the drone and captured a full view of the mountain).  There’s not too much to do in Weed, but just a short 5 minute drive is the small mountain town of Mt. Shasta which has some nice little shops and a great view of the mountain.  This area is home to many legends including the 7 foot tall Lemurians – the beings that are said to live beneath Mt. Shasta; legend has it that they’ve evolved beyond the spiritual into the physical plane, and walk around town in white robes.  However, we only saw the town statue of one.  The next morning was very cold (18 degrees).  Hot cocoa helped!  Fortunately, everything in the Scamp was working except the dump valves which were frozen shut.  We were able to dump a couple hours later at a Pilot station when the temperatures were in the 60s.

After breakfast the next day, we reached Oakland five hours after leaving Weed and arrived at my sister Hilary’s house around 1 p.m.  We set up the Scamp on the street and, like last time, used our leveling wedge to get the Scamp reasonably level side to side (since the street is very angled).  We enjoyed seeing my sister and her family and had a nice dinner in her backyard.  The next morning we all took a long walk through a nice neighborhood on Alameda island.  We had breakfast in the Scamp before heading out to our last stop on a ranch in Bakersfield.

The Rock’n H Ranch is a very fun miniature donkey farm out in the hills of Bakersfield (about halfway between Oakland and San Diego).  It is a Boondocker’s Welcome location and there was no charge for our stay (although we did give the host a small gift for having us).  The host is very generous and has about 20 acres of land (located down a long bumpy dusty dirt road off the main road) and told us we could park anywhere.  We had access to water.  There was cellphone coverage (Verizon) and lots of HDTV channels.  We set up our Scamp on a hillside near the donkey pen and the donkeys seemed very interested in what we were doing as we set up our Scamp!  The host allowed us to pet and feed the animals.  There are also goats, horses, a cat and dog, and a llama on the farm.  We spent a fun afternoon with the host hanging out and playing with and feeding the animals.  We then had a nice quiet evening.  I took some drone images of the ranch at sunrise the next morning at the request of the host.  We left fairly early to be able to get home in time for lunch and then wash and clean our Scamp and SUV before putting them in the garage.

We had a fantastic trip, lots of adventures, and made some new friends.  Fortunately, there were no hard lessons on this trip and we look forward to planning our next adventure!  We did learn a few things about some supplies to improve future trips and will write about those in future articles.

Disclaimer:  You will get the same great Amazon price by clicking on the links here compared to buying directly on Amazon, but by buying here you will also be supporting the continuation of this website as we get a small commission from each sale.  These are products and procedures we use for our own Scamp that we selected and developed from our own research and experiences.  However, we do not endorse any specific product and cannot guarantee that the products we use are exemplary and the procedures we use are complete, accurate, detail the correct recommended procedures, or apply to your model small travel trailer.  It’s always best to double check with your manufacturer or operation manuals to ensure you are doing everything correctly.