Off-Grid Solar Basics for a Small Minnesota Cabin or Camp
A lot of the people who call us about land have the same question once they've picked out a parcel: "How do I get power out there?" On many of our wooded lots, the simplest answer for a camper, a hunting shack or a small cabin is a modest solar setup. You don't need to be an electrician to understand the basics, and a small system can grow with you as your plans for the land grow.
This guide walks through how solar works for a part-time place in central and northern Minnesota, what the parts do, how our cold winters change things, and how to size a setup that fits the way you'll actually use your land.
Start With What You Want to Power
Before you shop for panels, make a simple list of everything you'd like to run and for how long. Solar is sized by energy use, not by wishes, so this list is the most useful thing you can do.
Energy is counted in watt-hours. A 10-watt LED light left on for 5 hours uses 50 watt-hours. A phone charge, a fan, a small water pump, a laptop and a few lights add up quickly, and anything that makes heat (a space heater, a coffee maker, a hair dryer) uses far more than a small system can handle.
A few things to note on your list:
Lights and charging: easy for even a small setup.
Water pumps and fans: fine in moderation.
Camper furnace blowers: a propane furnace still needs electricity to run its fan, and on cold nights that fan can be one of the biggest draws in an RV.
Anything with a heating element: plan on propane, wood or a generator for these instead.
Once you've added up a typical day, you'll know roughly how many watt-hours your batteries need to store and your panels need to replace.
How the Minnesota Sun Works, Summer to Winter
Minnesota gets more sun than most people expect. The Minnesota Department of Commerce notes that the state's yearly solar resource is similar to parts of Florida and Texas. The catch is how unevenly that sun is spread across the year.
Around the winter solstice, towns near our parcels, like Brainerd, get only about eight and a half hours of daylight, and at midday the sun sits only about 20 degrees above the southern horizon. In June, the days are nearly twice as long and the sun is high overhead. So a system that easily keeps up from May through September may fall short in December and January.
For most part-time land owners, that's fine. Summer camping, fall hunting and spring fishing trips line up with the sunny months. If you plan to use your place in deep winter, size up your batteries and keep a backup charging source on hand for cloudy stretches.
One bit of good news: solar panels actually work a little more efficiently in cold weather. Short days, low sun and snow cover are what hold winter output down, not the cold itself.
The Four Parts of a Simple Solar Setup
Every off-grid solar system, from a single panel on a camper to a full cabin setup, comes down to four parts:
Panels turn sunlight into electricity.
A charge controller sits between the panels and the batteries and keeps the batteries from being overcharged. The cheaper PWM type works for small setups. The MPPT type costs more but gets more out of your panels, which matters in winter.
Batteries store the power for nights and cloudy days.
An inverter changes the batteries' 12-volt DC power into the 120-volt AC power that household plugs use. If you only run 12-volt lights, fans and USB chargers, you may not need one at first.
Keep it simple at the start. Many of our buyers begin with a couple of panels, a controller and a battery or two in a camper, and add more once they know how they use the land.
Batteries and Minnesota Cold
Batteries are where Minnesota winters really matter, and the two common types behave differently.
Lithium (LiFePO4) batteries are light, last many years and can be drained deeper than lead-acid. But they should not be charged below freezing (32°F), because charging cold cells can damage them. Many have built-in protection that blocks charging when it's too cold, and some models include heaters. Check the manual for your battery.
Lead-acid batteries (flooded or AGM) cost less up front and can be charged in the cold. A fully charged lead-acid battery is very hard to freeze, but a run-down one can freeze at temperatures a Minnesota winter reaches easily, and a frozen battery is usually ruined.
Either way, the rule is the same: don't leave batteries sitting drained in the cold. If you're closing up for the winter, charge them fully and disconnect them, or bring them home. If you'll visit in winter, keep the battery bank inside an insulated space rather than out in the open.
Placing Panels on a Wooded Lot
Most of our parcels are wooded, which is a big part of their appeal, and it means you'll want to think about where your panels go.
Face them south. In Minnesota, panels should face south for the best year-round output.
Watch the shade. Even shade on part of a panel can cut its output a lot. Walk your land at midday and notice where the sun reaches, especially in late fall when the sun is lowest.
Use a ground mount or pole mount. This lets you put panels in the sunniest clearing, not just on the roof, and makes it easy to brush off snow.
Tilt them steeply for winter. A steep angle catches more of the low winter sun and helps snow slide off.
Small camps often get by with one or two portable panels they can move around the site or set out in the driveway clearing during the day.
Three Starter Setups
Here's how this tends to work out on land like ours:
The weekend camper: one or two panels on the roof or on a portable stand, a small controller and one battery. Enough for lights, a water pump, phone charging and the furnace fan on shoulder-season trips.
The hunting shack: a small ground-mounted panel, a couple of batteries and a 12-volt setup for lights and charging. Heat comes from propane or wood.
The three-season cabin: a few panels on a pole or ground mount, an MPPT controller, a lithium battery bank kept indoors and an inverter for regular outlets. Many owners keep a small generator for long gray spells.
Rules for structures and power systems vary by county and township, so check locally before you set up anything permanent.
Solar on Your Own Piece of Minnesota
Part of the fun of owning raw land is figuring out how you want to live on it. Solar lets you start small with a camper and a panel, learn how much power you really use, and build from there without waiting on anyone.
If you're looking for a place to try it, our Parcel For Off-grid Living with Hill and Parcel For Off Grid Living near Cushing are wooded lots built for this kind of project, and Vacant Land For Off Grid Living is listed at $12,995 right now. You can see everything else on our current properties page.
Browse our available parcels, and reach out anytime with questions. We're always happy to talk through how you'd like to use the land.
Comments