DIY Solar Power - Made Easy!
  • Home
  • DIY Solar Packages
    • Vehicle Mounted 12v Systems >
      • The Minimalist (great for small vans and cars)
      • The Classic 400 Watt (RV's, Vans, Buses)
      • 400 Watt w/ Alternator Charging
      • The Off Grid King (Power Anything!)
    • 48V Offgrid System Blueprint
    • Complete 48V Solar Kits
    • All-in-One 12/24/48V Packages
    • Code Compliant 48V Offgrid System
    • Design Your Own Raw LiFePO4 System
    • Grid-tie Systems
    • Other Packages >
      • Solar Trailer
      • 2000 watt, 24v Solar System
      • 4000 watt, 24v Solar System
      • Milk Crate Solar Power System
      • 12v Solar without a Battery
  • Solar Batteries
    • 12V Lithium Batteries
    • 48V Server Rack LiFePO4
    • Raw LiFePO4 Cells
    • BMS
    • Sealed Lead Acid Batteries
  • Solar Components
    • 50-250W Solar Panels
    • 300W+ Solar Panels
    • 48V All-in-one Buyer's Guide
    • Inverters
    • Solar Charge Controllers
    • Battery Chargers
    • Wire and Connectors
    • Fuses and Circuit Breakers
    • Battery Monitors
    • Battery Capacity Testers
    • Automatic Transfer Switches
    • Battery Isolators
    • Tools
  • Plug-N-Play Systems
    • Full Size Systems
    • Ultra Portable Systems
  • Appliances
    • Solar Friendly Air Conditioners
    • 12v Fridges
  • DIY Solar Book
  • Videos
    • Electricity for Dummies
    • Solar Power for First Timers
    • General Solar Education Videos
    • DIY LiFePO4 Video Series
    • Solar Wiring Configuration Diagrams
  • The Forum
  • Help Section
    • How to Mount Solar Panels to a Vehicle
    • How to connect Solar Panels to your Solar Generator
  • Contact Me
  • Policies and Disclaimers

2000 watt, 24v Off-grid solar power system

Recommended Components (scroll to bottom of page to see what products I recommend):
  • 400-2000 watts of solar panels
  • ​40 amp MPPT charge controller with over-current protection 
  • 2x or 4x 12v,100 ah LiFePO4 Batteries (wire these 4x batteries in series/parallel to create a large 24v battery bank)
  • 1000-3000 watt, 24 volt inverter
  • 40amp DC-DC Converter for 12v appliances. 24v goes in, 12v goes out
  • Battery Protect by victron energy, 100 amp
  • 4 gauge copper wire and lugs/heatshrink
  • 50 amp circuit breaker for the MPPT​, 25 amp fuse for the converter
  • Wooden board to mount the components
This system is a beast! It can handle any solar panel array up to 2000 watts, can handle a large battery bank of 24/12/6 batteries wired to 24 volts, and can power a large 24 volt inverter (inverter size will be limited to battery size in this situation)
Picture
Due to a recent change by victron, the battery protect is not recommended for this system. Just connect everything to a bus bar or surface mount terminal. 
Picture
If you are not familiar with 24 volt systems, check out my video: Click Here to watch my 12v vs. 24v Video
Pros of a 24 volt System:
  • Lower Financial Cost Compared to 12v System. Save a lot of $$$
  • Higher Efficiency of Components and Wires
  • Higher Power Output from Smaller Components
  • 24 volts is considered a very "safe" voltage to work with
    ​
Cons of a 24 volt System:
  • You need a higher voltage solar panel array. Not really a con because you should be series connecting your panels anyways. Open circuit voltage of solar panel array must be at least 40+ volts if you plan to charge a 24 volt battery with it. This means that if you are using 12 volt panels (open circuit of 17-20 volts), you will need to series connect your panels to create a larger voltage.
  • Difficult to source 24 volt solar system components locally. 12v is easy to find at stores, 24v components require ordering online.
  • Difficult to charge with a vehicle alternator. I do not suggest anyone charging a deep cycle battery with an alternator regardless, but some people still insist upon it. If you have a 24 volt system, you will need some special circuits that are extremely expensive to get it to work. Or buy and install a 24 volt alternator.
  • If you have 12 volt appliances, you will need to run them with a 24v to 12v converter. Very easy to do!

​In my opinion, the pros dramatically exceed the cons. If you are trying to convert your system to 24 volt, it may not be worth it. But if you are building it from the ground up, a 24 volt system is a great way to go!

Step 1: Mount components to a wooden board like this:
Picture
This picture should give you a rough idea of how to mount and connect your components. Each system is different though, so be sure to use my book to calculate the fuse and wire gauge size for your components. This picture does not cover other remote wires/shunts/temperature compensation wires etc, so please be sure to use my book to understand how this all works!

Step 2: Connect to 24v Battery Bank
Picture
If everything is installed correctly, the solar charge controller should now turn on, and you should be able to run the inverter. You may see a small spark when you connect the inverter to a battery, and this is completely normal.

Step 3: Mount Solar Panels to the roof and Connect them to Solar Charge Controller

If you follow the previous steps correctly, the solar charge controller should now be charging your battery! (if there is sunshine present)
​For more information on how to do this, please check out my book :)

Components I recommend for this system:

​(I make a commission for purchases made through the links below)

Buy 400-2000 watts of Either Glass or Flexible solar panels

Glass Solar Panels
​(recommended)

Picture
Pros:
  • Cheap (usually)
  • Extremely durable (can handle snow, rain, heat for years!)
  • Easy to mount on a vehicle's roof. Click Here to learn how
  • Last 25+ years, no problem

Cons: 
  • Heavy. Typically around 16 pounds for a 100 watt solar panel
  • Can cause a huge amount of aerodynamic drag to your vehicle
  • Mounting glass panels to the roof of a moving vehicle is typically a bad idea. If one of these falls off your roof, someone can die. Make sure you mount all panels properly.
  • Requires air flow under the panel. Just an inch or so, not much, but it is necessary. 

400 watts of Glass Solar Panels
Click here

Flexible Solar Panels

Picture
CIGS Flex panels are the only type of flex panel that I recommend. Everything else on the market is junk, and will have reduced output after 6-12 months.

​Other flex panels on the market cannot flex that much, and you will cause permanent damage if you flex it even once. They are fragile and like to fail often.

But CIGS are the only exception. They are flexible, durable and last much longer than any other flex panel on the market. They also handle shading really nicely, and can even produce electricity after being shot with a gun. 
​
Pros:
  • Lightweight. Typically 3 pounds for a 100 watt solar panel
  • Easy to mount (CIGS come with an adhesive backing so it takes minutes to mount them)
  • Aerodynamic efficiency (they are designed to be flush mounted on your roof, which means better gas mileage for your vehicle)
  • Durable. You can safely walk on these flex panels.
Cons:
  • Expensive! 

These CIGS solar panels used to cost $1000 for 100W only a few years ago, but manufacturing tech has reduced the price down to $250 for a 80W panel. Which is something I never thought I would see. These are still more expensive than glass solar panels, but they are worth it if you want a flex panel.

Click Here to purchase

Buy my favorite 40 amp mppt solar charge controller:

Picture
Max. Solar Input Power:
You can hook up a maximum of 2080 watts of solar power to this charge controller (only when the controller is used with a 24v battery). The max charge rate is limited to 40 amps at 24v. ​

​The benefit of having 2000 watts attached to this 40 amp controller is that there is more power production during sunrise and sunset times. If you wish to harness the entire 2000 watts of solar power, use a 60 or 80 amp charge controller: (Click here to see other charge controllers)

​
Be sure to read the instruction manual. Lots of really fun features in this controller!

​40 Amp MPPT Charge Controller kit: Click Here for a cheap price



Choose a battery:

12 volt Sealed Lead Acid
Picture
Buy 4 or 6 of these:
155 amp hour AGM Sealed Lead Acid Battery
​Click Here for a cheap price
  • Weight: 190 pounds total
  • ​Charge Cycle Life: 500-1,000 cycles
  • Depth of Discharge(how much of the batteries capacity you can actually use): 50%
  • (Cheaper initially, but expensive in the long run)
or
12 volt Lithium Iron Phosphate 
​(recommended)
Picture
​Buy 2 or 4 or 6 of these (whatever you can afford):
Click Here to buy it directly from Battle Born
​
  • Weight: 60 pounds total
  • ​Charge Cycle Life: 3,000-5,000+ cycles
  • Depth of Discharge(how much of the batteries capacity you can actually use): 100%
  • (This battery is expensive initially, but much cheaper in the long run)
This battery can safely be series connected to create 24 volts. Not all lithium batteries can do this! Stick to battle born if you are building a 24 volt system.
Click here for a cheaper lithium battery option

24v, 2000 watt inverter:

Picture
 2000 watt pure sine wave inverter
(pure sine wave inverters are better and more efficient, and work with all AC electronics)

Pure sine wave is the way to go. They cost more initially but work much better!

Click Here



Wire and Adapters:

Picture
High-Quality Copper Wire for DC appliance hookup
(most wire on amazon is "copper clad aluminum", which is cheaper but lower in quality):

50 feet 10 gauge Blue/Black
Click Here


Picture
​Solar Panel Array to Solar Charge Controller Cable (this cable goes through your roof):
​ 
Click Here
Picture
​Battery to Battery Cables

Any size battery (be sure to select the right size for your battery bank) Click Here
Picture
​Pre-fabricated Battery to
​Inverter Cables
​(if your inverter does not come with them)

make sure that the holes on the connector will work with your battery/inverter

12 volt 500-1100 watt inverter
​0r 24 volt 1000-2200 watt inverter  
Click Here


12 volt 1000-2000 watt inverter
or 24 volt 2000-4000 watt inverter 
Click Here


12 volt 2000-4000 watt inverter
​or 24 volt 4000-8000 watt inverter
​Click Here
Picture
Main Component Hook-up wire/connectors/heatshrink
Requires a Hammer-type Crimper and Assembly. Great for custom built systems where length of each wire matters. If you are a beginner, stick to pre-fabricated cables.

Click on a link below and choose your length
​(default length is 10 feet of red, 10 feet of black): 
  • 8 gauge kit
  • 6 gauge kit
  • 4 gauge kit
  • 2 gauge kit
  • 1/0 gauge kit
  • 2/0 gauge kit
  • 4/0 gauge kit

Solar Panel Cable Entry Gland

When your solar panel array wires enter your vehicle, you will need to drill two holes. Use this cover to prevent roof leaks from developing.

 This system requires x1 Click Here
Picture


Required fuses, fuse blocks, bus bars and Circuit breakers:

​Battery Bank To Inverter/Fuse Block Main Fuse

Picture
100 amp Fuse and Holder 

150 amp Fuse and Holder

200 amp Fuse and Holder

250 amp Fuse and Holder

300 amp Fuse and Holder



Fuse Block

Picture
Connect 12 volt appliances here
Click here

​

Required Circuit breaker for
​Solar Charge controller to Battery

Picture
If you use the recommended 40 amp solar charge controller, you will need to install this 50 amp circuit breaker between the solar charge controller and the battery, on the positive wire. 

Click here

bus bar

Picture
​Connect multiple components on a wooden board with a bus bar
Click here for a wide selection of bus bars for every situation
 

Picture
24v->12v Converter, 40 amp output

24v goes in, 12v 40 amps goes out. Super easy to use. 
​
​Click Here

​Solar Panel Mounts:

Every vehicle is different, so check out my book and this page (click here) to figure out how to mount your solar panels

Battery Monitor:

Picture
This device will tell you how much power you have left before your batteries go to zero. Simply attaches at the main negative lead of your battery bank.

​
Click Here to purchase



If you want a higher quality battery monitor with bluetooth connectivity and data logging, check out the Victron Smart Shunt instead. It does cost more, but it is a fantastic device that I use on all of my systems: Click Here

Required Tools:

Picture
Precision Wire Stripper

8-22 gauge wire
Click Here
Picture
Hammer Type Crimper
Can crimp up to 4/0 gauge wire, and it is much cheaper than other large wire crimpers. If you plan to build only one system, this is the tool for you. 

Click Here
Picture
Ratcheting Crimper
Allows you to crimp standard size crimp connectors.
 Click Here
Picture
​Standard Size Crimp Connector set
There are cheaper crimp connector sets available, but they are junk! Spend the extra money and buy a high quality set of connectors. The cheap chinese ones will fail and I have had it happen before. This is what I currently use:
Click Here
Picture
Large Size Crimp Connector Set
Use this set to connect large wires together, such as inverter or solar charge controller wires. 
Click Here

Other Accessories

Picture
12 volt USB charge strip
 Click here
Picture
46 Liter Dometic Solar Power Fridge
 Click Here

Picture
Power panel with switches and USB/cigarette lighter plug
Click Here


Picture
Battery bank to cigarette light adapter
Click Here
​
Picture
Color Changing LED lights
$14.99 Click here


or
​
White LED light strip
Click here

Picture
When connecting fans or lights or pretty much anything, use these quick connectors that are rated to 60 amps! I have used them for years for my rc airplanes and helicopters, but they are insanely useful for living in a rv. 


Click Here
 
Picture
Super useful clippers. Use them to cut anything small.


Click Here

Home

Plug-n-play Systems

All-in-one complete systems

Lithium Batteries

The Book


Solar System Component Directory

DIY Solar Videos

DIY Solar Forum


Copyright  Prowse Publications LLC © 2022
Prowse Publications LLC (www.mobile-solarpower.com) is a participant in the Amazon Services LLC Associates Program,
​an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com
I make a commission for sales made through affiliate links posted on this website
  • Home
  • DIY Solar Packages
    • Vehicle Mounted 12v Systems >
      • The Minimalist (great for small vans and cars)
      • The Classic 400 Watt (RV's, Vans, Buses)
      • 400 Watt w/ Alternator Charging
      • The Off Grid King (Power Anything!)
    • 48V Offgrid System Blueprint
    • Complete 48V Solar Kits
    • All-in-One 12/24/48V Packages
    • Code Compliant 48V Offgrid System
    • Design Your Own Raw LiFePO4 System
    • Grid-tie Systems
    • Other Packages >
      • Solar Trailer
      • 2000 watt, 24v Solar System
      • 4000 watt, 24v Solar System
      • Milk Crate Solar Power System
      • 12v Solar without a Battery
  • Solar Batteries
    • 12V Lithium Batteries
    • 48V Server Rack LiFePO4
    • Raw LiFePO4 Cells
    • BMS
    • Sealed Lead Acid Batteries
  • Solar Components
    • 50-250W Solar Panels
    • 300W+ Solar Panels
    • 48V All-in-one Buyer's Guide
    • Inverters
    • Solar Charge Controllers
    • Battery Chargers
    • Wire and Connectors
    • Fuses and Circuit Breakers
    • Battery Monitors
    • Battery Capacity Testers
    • Automatic Transfer Switches
    • Battery Isolators
    • Tools
  • Plug-N-Play Systems
    • Full Size Systems
    • Ultra Portable Systems
  • Appliances
    • Solar Friendly Air Conditioners
    • 12v Fridges
  • DIY Solar Book
  • Videos
    • Electricity for Dummies
    • Solar Power for First Timers
    • General Solar Education Videos
    • DIY LiFePO4 Video Series
    • Solar Wiring Configuration Diagrams
  • The Forum
  • Help Section
    • How to Mount Solar Panels to a Vehicle
    • How to connect Solar Panels to your Solar Generator
  • Contact Me
  • Policies and Disclaimers