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100 Watt Solar Panel Wiring Diagram

This 100W solar panel wiring diagram for RV and campervan conversions is a template for planning your electrical system. It covers the main parts of a solar system and shows how to lay out the components.

Explore our electrical page for deeper information on each part.

100 Watts is enough to power small electronics such as cell phones, lights, a vent fan, or possibly a small laptop. Keep in mind that if you plan on wiring in an alternator or generator the system layout changes a bit. It’s better to plan for them at the beginning than try to add them in later.

Before purchasing wires and fuses, read our post on wiring your campervan.

The diagram below depicts a system with <10ft. of wire. If you need to run your wires longer, refer to the graph in our wiring your campervan post to determine the correct wire gage for you.


Want a different amount of solar?
200 Watt Solar Panel Wiring Diagram  •  450 Watt Solar Panel Wiring Diagram


Electricity is a serious task to take on. There are many examples of things online that “can” be done but should not, so consume Youtube instructions and articles such as this one with caution. It is always a good idea to consult with experts before you buy expensive parts to make sure the way you are planning on using it will be safe.

100W Solar Installation Parts*SizeQuantity
Monocrystalline Solar Panel100 Watt1
Solar Panel Roof Mounting Z-Rack-Optional (1)
Solar Panel Adjustable Tilt Mount-Optional (1)
PWM Charge Controller10A1
AGM Deep Cycle Battery75AH1
Multi Step Inverter300WOptional (1)
4 Way Fuse Block & Bus Bar-1
Battery Terminal Connectors-1
Electrical Wire Crimp Connector Assortment Kit-1
Extension Cable (solar MC4 connectors → charge controller)10AWG1

*Not included are the wiring and small fuses needed as those vary between installs and can be bought at a hardware store.

100 watt solar panel wiring guide for an rv or campervan conversion

Total Cost of a DIY 100 Watt Solar Panel Kit:

When choosing to buy just the basics, you can spend as little as $350 on a 100 Watt solar kit including an inverter with all new components.

Alternatively, a Goal Zero Yeti kit can be purchased and includes everything except the solar panel mounting hardware. This would be the equivalent of a 100Watt solar suitcase paired with a 100Ah AGM battery and 1200 Watt inverter. Our estimate that the DIY pieces separately for this would be easily under $100

Parts of a Solar Power Kit for RV and Campers

Solar Panels

Polycrystalline and monocrystalline solar panels are the best for an RV or camper. Monocrystalline panels will have a slightly smaller footprint, but polycrystalline are generally the least expensive.

Rigid solar panels are more durable than flexible ones and they also last longer.

An extension cable is necessary to connect most solar panels to your charge controller. Solar panels tend to come with short cables.

More Info: Best Solar Panels

Mounting Brackets

Z-brackets are the easiest way to mount solar panels to your roof.

An adjustable tilt mount will enable you to adjust panels so they are directly facing the sun. Tilt mounts can increase your solar panel efficiency by as much as 30%.

Charge Controllers

There are two types of charge controllers, PWM and MPPT. A charge controller helps get solar energy into your battery. In a 100 Watt solar panel system, a 10A PWM charge controller is the best choice.

More Info: Charge Controllers

Battery

For 100W of solar power, a 12V 75Ah deep cycle battery is sufficient to charge small electronics. To make the most of your battery, avoid discharging it more than 50%.

Battery terminal connectors are use to bond your battery to the other wires.

More Info: Batteries

Inverter

The multi-step inverter is an optional component. An inverter converts 12V DC electricity into 120V power. You can use an inverter to plug in household items like a laptop or TV.

We recommend a 300W inverter for a 100W solar power set up.

More Info: Inverters

Wires and Fuses

The wire and fuse sizes are dependent on how far you are running your wires. The diagram depicted above shows approximate gage and fuse sizes for running under 10 feet of wire.

If you are in a large RV and running the wires longer, refer to our wiring guide to determine the appropriate sizes.

The fuse block with bus bar, and wire crimp connectors are needed to use your batteries.  

More Info: Wiring & Fuses

 
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