3000w INVERTER | 400-600Ah | 400 TO 1200W SOLAR -CAMPER SOLAR KIT

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This wiring diagram will show you everything you need to know about installing the core elements of a high-end camper solar electric setup. This system features a 3000 watt inverter and can handle MANY different configurations of solar panel array with almost no changes to the core wiring of this diagram. This is a long read and if you have questions, drop them in the comments below or if you feel you need additional guidance, you can set up a call with me: CLICK HERE for more info.

CLICK HERE TO PURCHASE THE HI-RES PRINTABLE PDF OF THIS DIAGRAM

3000w Inverter – 150v Charge Controller – Orion – 600Ah
3000W Victron Multiplus Inverter Charger

3000W Victron Multiplus Inverter Charger

In the next section, I’ve put together a list with all of the wires, lugs, fuses, heat shrink, terminals and such consolidated and totaled up into a parts shopping list.

If you would like to buy all of the wires, fuses, lugs, and accessories from me, I have made that available for you and you can check out that wiring kit here: https://www.explorist.life/shop/wiring-kits/3000w-150v-600ah-camper-solar-wiring-kit/

Although this won’t save you much money, it’s priced the same as if you were to buy all of the parts from Amazon and I’m hoping that offering this wiring kit will simplify the process as sometimes Amazon runs out of stock or switches products on me out of nowhere. If you’d rather go through Amazon or shop around for the best pricing, that’s totally fine and I hope this list helps.

(Note: Wire listed as Quantity = Feet. Heat Shrink as qty 1 = 2.25″. Everything else is listed as a Quantity = Each)

1 Space Left, 3 Space Right 4/0 Busbar1https://www.explorist.life/1-Space-Left-3-Space-Right-4-0-Busbar
1″ Black Heat Shrink16https://amzn.to/2Lhi5us
1″ Red Heat Shrink14https://amzn.to/2UXkdXW
1/2″ Black Heat Shrink6https://amzn.to/2UTm44N
1/2″ Red Heat Shrink6https://amzn.to/2XHkXSv
10 AWG Black Wire15https://amzn.to/2vPv7Fo
10 AWG Red Wire25https://amzn.to/2ODKtDW
10/3 Wire15https://amzn.to/2GOyYYW
100 Amp ANL Fuse1https://amzn.to/2VeDqIx
100Ah Battle Born Lithium Batteries6https://battlebornbatteries.com/shop/12v-lifepo4-deep-cycle-battery/?afmc=explorist_bb67
Solar PanelsXSelected by User (More Info Below)
12v Victron Multiplus 3kw1https://battlebornbatteries.com/shop/victron-multiplus-inverter-charger-3000w/?afmc=explorist_bb67
150 Amp ANL Fuse1https://amzn.to/2GIsOtt
2 AWG Black Wire5https://amzn.to/2OLhdem
2 AWG Red Wire5https://amzn.to/2L1pg4D
2 AWG x 3/8″ Wire Lug1https://amzn.to/376xxjz
2 AWG x 5/16″ Wire Lug1https://amzn.to/2CflSk3
3/4″ Black Heat Shrink1https://amzn.to/2IV2m1b
3/4″ Red Heat Shrink1https://amzn.to/2GEVB26
30A Flanged Power Inlet1https://amzn.to/2OezZLl
4/0 Black Wire12https://amzn.to/2D2ohiW
4/0 Red Wire10https://amzn.to/345wpv5
4/0 x 3/8″ Wire Lug1https://amzn.to/31kUNYM
4/0 x 5/16″ Wire Lug29https://amzn.to/332omOg
400 Amp ANL Fuse2https://amzn.to/32YRsOs
50 Amp ANL Fuse1https://amzn.to/2XJKZoo
50 Amp Terminal Fuse1https://amzn.to/2RnE7v6
50A Dual Pole Solar Disconnect1https://amzn.to/38iYKQ3
6 AWG Black Wire30https://amzn.to/2OF2LV6
6 AWG Red Wire30https://amzn.to/2Qntd7n
6 AWG x 5/16″ Wire Lug8https://amzn.to/2CfLrRU
6 AWG x Ferrule2https://amzn.to/2TD0K1I
6/3 Wire10https://amzn.to/2J0rgww
Din Rail Breaker Box1https://amzn.to/2HoHEVv
HOM 50 Breaker1https://amzn.to/2S6J9N6
HOMT 2020 Breaker1https://amzn.to/397r492
MC4 Connectors1https://amzn.to/2OExd1G
Roof Entry Gland1https://amzn.to/2BeqtWD
Terminal ANL Fuse Holder1https://www.explorist.life/shop/uncategorized/terminal-anl-fuse-holder/
Victron Orion Smart 30A 12v to 12v Charger1https://www.invertersupply.com/index.php?main_page=product_info&products_id=194832
Solar Charge Controller1Selected by User. More Info Below.
WFCO AC-DC Distribution Panel1https://amzn.to/2KX9IAz
Victron BMV-7121https://amzn.to/2P5YBG9
Victron Bluetooth Dongle for Multiplus Inverter1 https://battlebornbatteries.com/shop/ve-bus-smart-dongle/

DETAILED PARTS BREAKDOWN

The section below will tell you where each of the parts from above fits into the wiring diagram. This is quite lengthy, but if you are having trouble seeing the diagram or just want more clarification that the diagram above doesn’t deliver, hopefully this will help:

Part DescriptionQty/FtProduct
Batteries6100Ah Battle Born Lithium Batteries
(Qty: 5) x 6.5″ x 4/0 Positive Battery Interconnect Wires34/0 Red Wire
(Qty: 5) x 6.5″ x 4/0 Negative Battery Interconnect Wires34/0 Black Wire
Wire Lugs on Battery Interconnect Wires204/0 x 5/16″ Wire Lug
Heat Shrink on Positive Battery Interconnect Wires101″ Red Heat Shrink
Heat Shrink on Negative Battery Interconnect Wires101″ Black Heat Shrink
Fuse Holder mounted on Positive Battery lug Protecting Positive Wire to Busbar1Terminal ANL Fuse Holder
ANL Fuse Protecting Positive Wire1400 Amp ANL Fuse
Inverter112v Victron Multiplus 3kw
Positive DC Wire from Busbar to Inverter24/0 Red Wire
Negative DC Wire from Busbar to Inverter24/0 Black Wire
Ground DC Wire from Busbar to Inverter24/0 Black Wire
DC Wire Lugs on Positive Inverter Terminal14/0 X 5/16″ Wire Lug
Red Heat Shrink on DC Wire Lugs on Positive Inverter Terminal11″ Red Heat Shrink
DC Wire Lugs on Negative Inverter Terminal14/0 X 5/16″ Wire Lug
Black Heat Shrink on DC Wire Lugs on Negative Inverter Terminal11″ Black Heat Shrink
DC Wire Lugs on Ground Inverter Terminal14/0 X 5/16″ Wire Lug
Black Heat Shrink on DC Wire Lugs on Ground Inverter Terminal11″ Black Heat Shrink
DC Wire Lugs on Positive Busbar ANL Fuse to Inverter14/0 X 5/16″ Wire Lug
Red Heat Shrink on DC Wire Lugs on Positive Busbar ANL Fuse to Inverter11″ Red Heat Shrink
DC Wire Lugs on Negative Busbar ANL Fuse to Inverter14/0 X 5/16″ Wire Lug
Black Heat Shrink on DC Wire Lugs on Negative Busbar ANL Fuse to Inverter11″ Black Heat Shrink
DC Wire Lugs on Busbar from Inverter Ground Wire14/0 X 5/16″ Wire Lug
Black Heat Shrink on DC Wire Lugs on Negative Busbar ANL Fuse to Inverter11″ Black Heat Shrink
Wire from AC Out to Power Distribution Panel106/3 Wire
Wire from Shore Power Inlet to Inverter Charger1510/3 Wire
Shore Power Inlet Flange130A Flanged Power Inlet
Solar Panels3100W Renogy Solar Panel
Charge Controller1Victron SmartSolar MPPT 150 | 100
Positive Pre-Series Termination Solar Wires2510 AWG Red Wire
Negative Pre-Series Termination Solar Wires1510 AWG Black Wire
Solar Interconnect MC4 Connectors0MC4 Connectors
MC4 Connector from Single-Series Array to Charge Controller1MC4 Connectors
Dual Pole Disconnect Upstream of Charge Controller150A Dual Pole Solar Disconnect
Din Rail Breaker Box1Din Rail Breaker Box
Positive Wire between Charge Controller and ANL Fuse on Positive Busbar52 AWG Red Wire
Negative Wire between Charge Controller and Negative Busbar52 AWG Black Wire
Fuse connecting Charge Controller to Positive Busbar1150 Amp ANL Fuse
Wire Lug on ANL Fuse on Positive Busbar12 AWG x 5/16″ Wire Lug
Heat Shrink on Wire Lug on ANL Fuse on Positive Busbar13/4″ Red Heat Shrink
Wire Lug on Negative Busbar12 AWG x 3/8″ Wire Lug
Heat Shrink on Wire Lug on Negative Busbar13/4″ Black Heat Shrink
Roof Entry Gland1Roof Entry Gland
4/0 Wire from Battery Bank to Positive Busbar54/0 Red Wire
4/0 Wire from Battery Bank to Negative Busbar54/0 Black Wire
Lug attaching positive Battery to Busbar wire to Terminal ANL Fuse Holder14/0 x 5/16″ Wire Lug
Heat Shrink on Lug attaching positive Battery to Busbar wire to Terminal ANL Fuse Holder11″ Red Heat Shrink
Lug atttaching negative battery to Busbar wire to Negative Battery Terminal14/0 x 5/16″ Wire Lug
Heat Shrink on Lug atttaching negative battery to Busbar wire to Negative Battery Terminal11″ Black Heat Shrink
Lug attaching positive Battery to Busbar wire to Busbar14/0 x 5/16″ Wire Lug
Heat Shrink on Lug attaching positive Battery to Busbar wire to Busbar11″ Red Heat Shrink
Lug attaching positive Battery to Busbar wire to Shunt14/0 x 3/8″ Wire Lug
Heat Shrink on Lug attaching positive Battery to Busbar wire to Shunt11″ Black Heat Shrink
Power Distribution Panel1WFCO AC-DC Distribution Panel
Positive DC Wire from Busbar to Distribution Panel106 AWG Red Wire
Negative DC Wire from Busbar to Distribution Panel106 AWG Black Wire
Wire Lug connecting Positive wire to Distribution Panel16 AWG x Ferrule
Wire Lug connecting Nevative wire to Distribution Panel16 AWG x Ferrule
Wire Lug connecting Positive wire to Busbar from DC Distribution Panel16 AWG x 5/16″ Wire Lug
Wire Lug connecting Negative wire to Busbar from DC Distribution Panel16 AWG x 5/16″ Wire Lug
Heat shrink on Positive wire from Busbar to DC Distribution Panel21/2″ Red Heat Shrink
Heat shrink on Negative wire from Busbar to DC Distribution Panel21/2″ Black Heat Shrink
ANL Fuse Protecting Positive Wire from Busbar to DC Distribution Panel1100 Amp ANL Fuse
Main AC Breaker in Power Distribution Panel1HOM 50 Breaker
Breaker Space 11HOMT 2020 Breaker
Battery Isolator / B2B Charger1Victron Orion Smart 30A 12v to 12v Charger
Positive Wire between Starting Battery and Victron Orion Smart 30A 12v to 12v Charger156 AWG Red Wire
Negative Wire Between Starting Battery and Victron Orion Smart 30A 12v to 12v Charger156 AWG Black Wire
Positive Wire from Victron Orion Smart 30A 12v to 12v Charger To Busbar System56 AWG Red Wire
Negative Wire from Victron Orion Smart 30A 12v to 12v Charger To Busbar System56 AWG Black Wire
Wire Lugs on Starting Battery26 AWG x 5/16″ Wire Lug
Wire Lugs on Victron Orion Smart 30A 12v to 12v Charger26 AWG x 5/16″ Wire Lug
Wire Lugs on Busbar from Victron Orion Smart 30A 12v to 12v Charger26 AWG x 5/16″ Wire Lug
Heat Shrink on Positive Victron Orion Smart 30A 12v to 12v Charger Wires41/2″ Red Heat Shrink
Heat Shrink on Negative Victron Orion Smart 30A 12v to 12v Charger Wires41/2″ Black Heat Shrink
Fuse Protecting Positive Wire between Starting Battery and Victron Orion Smart 30A 12v to 12v Charger150 Amp Terminal Fuse
Fuse Protecting Positive Wire between Busbar System and Victron Orion Smart 30A 12v to 12v Charger150 Amp ANL Fuse
DC Distribution Busbar11 Space Left, 3 Space Right 4/0 Busbar

Choosing your Solar Panels & Charge Controller

The above diagram and parts list will be the ‘base’ of your plan but you still need to add an appropriately sized solar charge controller and MC4 combiners as necessary. This diagram is compatible with ANY/ALL of the following solar charge controllers without any changes to wire/fuse sizes.

  • Victron SmartSolar 150/45
  • Victron SmartSolar 150/60
  • Victron SmartSolar 150/70
  • Victron SmartSolar 150/85
  • Victron SmartSolar 150/100
  • Victron SmartSolar 150/45
  • Victron SmartSolar 250/60
  • Victron SmartSolar 250/70
  • Victron SmartSolar 250/85
  • Victron SmartSolar 250/100
    CLICK HERE to shop for your charge controller

If you are not sure what size of charge controller you need, you must FIRST decide on what solar panels and how many solar panels you will be using in your system.

Once you know WHAT and HOW MANY solar panels you will be using, you must NEXT decide on how they will be wired together.

Now that you know everything you need to know about your solar panel array, you can use this calculator to determine the proper size of charge controller for your system (Video tutorial below calculator):

Now that you know WHAT solar panels, HOW MANY solar panels, HOW TO WIRE your solar panels, and what charge controller will work best with your system, you need to add the correct parts and quantities to your base shopping list above. Here is a template to fill in the blanks:

QtyItemProduct
1Charge ControllerVictron Smartsolar MPPT _____/_____
___Solar Panels__________________________
1MC4 Combiner__________________________
___MC4 Fuse30A MC4 Fuse
___Additional MC4 ConnectorsMC4 Connectors (Pair)
___Additional red wire10 AWG Red Solar Wire
___Additional black wire10 AWG Black Solar Wire
  • Fill in ‘Charge Controller’ as determined from earlier.
  • Fill in ‘Qty’ and ‘Product’ for item ‘Solar Panels’ based on your needs.
  • If your panels are ALL in series. You do not need any additional products and can skip the bullet points below.
  • Fill in ‘MC4 Combiner’ based on how many Parallel Panels/Strings you have. Example: 2 parallel strings requires a 2-to-1 MC4 Combiner. 3 parallel strings require a 3-to-1 combiner. 4 parallel strings will require a 4-to-1 MC4 Combiner.
  • Fill in ‘Qty for Additional MC4 Connectors’ based on how many parallel panels/strings you have OVER 1. Example: 2 parallel strings requires 1 additional MC4 connector pair. 3 parallel strings will require 2 additional MC4 connector pairs. 4 parallel strings will require 3 additional MC4 Connector pairs.
  • Fill in ‘Qty’ for additional red and black wire. A safe quantity for this is 10 feet of EACH per parallel string OVER 1 in your system. Example: 2 parallel strings requires 10 feet of both red AND black wire. 3 parallel strings require 20 feet of both red AND black wire. 4 parallel strings will require 30 feet of both red AND black wire.

If you have any questions about this wiring diagram feel free to drop a question in the comments below. If you’d like to set up a consulting call to talk about your DIY Camper Solar needs, CLICK HERE.

17 thoughts on “3000w INVERTER | 400-600Ah | 400 TO 1200W SOLAR -CAMPER SOLAR KIT”

  1. Nate, this is a great diagram.
    I’m going to take a couple of days to absorb it.
    I’ll be joining your private DIY group soon to ask some specific questions.
    Thanks a TON for developing and posting this!!!!

  2. David P Johnson

    First off Thank You for putting this together! Obviously it was done with great detail. As a novice in solar I’ve been doing a ton of research and my only question is can this be done with a 3500-4000 watt inverter? Most of what I’ve read says that 3000 isn’t quite enough.
    Thank you,
    David

    1. This wiring setup would likely not work with a 3500-4000w Inverter. For anything bigger than a system with a 3000w Inverter, I’d be recommending switching the entire system to a 24v system. BUT… a 3000w Inverter is big enough for most loads. It can provide about 25A, which is more power than a single circuit on a household breaker. So… Ultimately it depends on what you are trying to power. In my solar power audit, once you put in your values, it will also give you an Inverter size recommendation. Here’s a tutorial for that: https://www.youtube.com/watch?v=a406IxiU-Xg

  3. Hello, Your videos and site have been most helpful in building a skoolie for my daughter. We are struggling with the electrical part a bit. I decided to go with a Victron multiplus just to make it cleaner and neater, but I am not understanding why if the Victron has the charge controller and the MPPT in it already we need to add another charge controller and MPPT exterior to this? We will only use shore power and 800 watts solar. 400 amps lithium batteries to start and add more later as funds are available. I thought for the most part with the Victron, you brought the shore and solar in to it then out to the distribution box, the house batteries, receptacles etc? would it be just as easy to set up without the Victron?
    Thank you so much for your help.

    1. The Victron unit with the Inverter and MPPT integrated into one single box (Victron EasySolar) only has an output of 230V (European Electrical Output) and will not work with devices in North America. The EasySolar you are referencing is only really useful to the European market (or the other places in the world where 230v power is the norm).

      The Victron MultiPlus is an Inverter/Charger (Charger referring to Charging via shore power) does not have an integrated MPPT for solar charging.

  4. Hi Nate,
    thank you for all your hard work. This site has helped tremendously. Just had one quick question. I noticed on this configuration using a 3000w inverter you elected to pair with 100amp fuse at the busbar. But conversely on other diagrams that use a 2000w inverter use used a LARGER 250amp fuse on a smaller system. that seems backwards? The amp fueses also change conversely to the A/C D/C distrubution panel and solar charge controller.
    How can i determine what fuses to use on a 3000w inverter but a 400amp hour batter stack? please advise.

    Thanks!!!!

  5. Does a solar panel array of 1600W and using a 2000W inverter instead of a 3000W inverter change the components/wiring of this diagram any aside from the charge controller? I also need 800 Ah of Lithium batteries rather than the 600 Ah specified, would this change the wiring diagram to the battery bank?

    1. You could downsize most of the wire to 2/0 instead of 4/0 going with a smaller inverter, but for 1600w of solar, I’d recommend either two charge controllers or going to a 24v battery bank. A single victron controller can only handle 1200w of solar into a 12v battery bank and can handle 2400w of solar into a 24v battery bank.

  6. Hi. I’ve been following you recently on YouTube. Question. Why do you connect the ground wire to the negative bus bar? Shouldn’t ground wire be connected to the chassis or proper ground conductor if it was at a home/cabin?

    Thank you,

    Trung Tran

  7. I have everything I need (after ordering the wiring kit from you) aside from the solar panels. I was wanting to get 4 – 300W panels but I noticed that it seems I can only find them in 24V versus 12V. Does that matter when it comes to the wiring diagram that you have here?

    1. Sounds great! This wiring diagram will handle that. You’ll want to go with the Victron SmartSolar MPPT 150|100 and wire your solar panels 2×2 in series and then the two series strings in parallel by using a 2-to-1 branch connector. If you opted to wire all 4 panels in series, you’d want to use the Victron SmartSolar MPPT 250|100.

  8. Nate these diagrams are invaluable.
    You have a 50 amp circuit breaker and a 20/20 circuit breaker on this diagram. I understand that the 20 amp breakers are for the 110 outlets. what is the 50 amp breaker for?

  9. Hi! I am doing my solar set up and I have decided to use the Renogy 50amp Dc to dc with MPPT. There is not a lot of info on this system and I would love to see you do a solar diagram for this charge controller. Will Prowse has done one but has not done a full diagram with all the components linked to it. I also have questions to check on wire sizes and what monitors I need for the control center of the van. Another question i have with this system is that it allows 25amps from solar and 25amps from the alternator, I am only having 300watts of solar on the roof, which will push 25 amps, so does it matter if i put my panels in series or in parallel?

    1. Hey Sami! I will likely never make a wiring diagram featuring that device as the MPPT on it only has a max voltage of 25 volts, which defeats the purpose of an MPPT in my opinion.

      For wire sizes for various components, you should check out this calculator (https://www.explorist.life/wire-sizing-calculator/) and tutorial (https://www.youtube.com/watch?v=ki3WXVR48eM)

      For series vs parallel: if you are using that device, since it has a maximum input voltage of 25 volts, you are forced into only being able to wire your panels in parallel.

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