All-In-One Solar Power System
-Build a full size system in minutes-

MPP and a few other manufacturers now sell a "complete off grid system in a box" that has:
  • AC Inverter
  • Solar Charge Controller
  • AC Battery Charger
  • Automatic Transfer Switch (if grid power is available)​
And they work! Instead of cutting/stripping/crimping wires for hours, and calculating fuse and wire gauge sizes, you can choose a package below and assemble it in minutes!

That is awesome! What is the catch?

Pros:

  • Cheaper than buying the individual parts and putting them together yourself

  • Takes an hour to assemble

  • Easy to program and can work with ANY battery (Lead Acid/LiFePO4/Titanate etc)

  • These units are made for offgrid use, but they have an AC input which can be used with the grid. This is because it has an AC battery charger built in. Or you can change the settings and use it as a UPS when the battery is low. It will divert grid power to your loads automatically!

  • High efficiency. Most I have measured are 96% efficient, which matches the efficiency figure in their datasheet. That is very impressive considering their price!

  • No need to calculate the requirements of your system, or safety devices. Connect some batteries and solar panels, change the settings, and you are done.

  • The DIY battery community has used these units 24/7 for years! They are extremely dependable. 

  • As of 2021, they are now UL certified! This means that the components inside the units are high quality. This is not easy to do, and it creates confidence that these units should last a long time!

Cons:

  • ​High idle consumption. If you wish to have your inverter on 24/7, you may want to invest in a victron or xantrex (but they will cost 3x-5x as much money). Because the idle consumption is high on these all-in-ones, you will need at least 400 watts of solar panels attached to your system to offset the loss. If you do not plan to have your inverter on 24/7, this is not a problem. 
    ​
  • Some models have a lower solar panel array input voltage (usually 60-148VDC). If you plan to connect a large solar array, you will probably need to put your panels in parallel to keep the voltage down. When you have more than 2 strings of panels in parallel, you need over current protection for each string. This is easily accomplished by using a combiner box. They are available below. Some models, like the MPP LVX, can handle 450VDC! So this issue is only for the smaller units.
    ​
  • Designed for offgrid use only. If you need a permitted and code compliant system connected to the grid, please check out what I recommend by clicking here.

2 System Voltages to choose from:
Everything below is designed to work in North America, not Europe or elsewhere
(International Inverters are available through the distributors below)

Van life 12v System
​(small and beginner friendly!)

Parts List:

  1. MPP 12V 1kW Model:
    Click Here to purchase
    ​​​​
  2. ​100-400+ amp hours of 12v Batteries:
    12v Lithium Batteries (choose one with low temp cut off!) Click Here

    12v Lead Acid batteries Click Here
    ​
  3. 200-500 watts of Solar Panels
    Click Here
  4. 6 gauge wire kit (Battery to MPP)
    Click Here
  5. Solar Panel Array to MPP Wires
    Click Here
  6. ​12 gauge AC Extension Cable for AC Input/Output (needs to be cut and stripped to install into mpp solar box)
    Click Here

Offgrid home/ RV/
​Cabin 48v System
(​Power anything you want)


Parts list:

Choose an All-in-one:
Batteries and Solar Panels etc:  
  • T Class Fuse (Required for large 48V systems. For sizing, consult the manual of your inverter):
    300A Click Here
    ​
  • 1000+ watts of Solar Panels
    Click Here

  • 2/0 gauge wire kit (Battery to MPP. Check your all in one box manual to see what it recommends. this wire works well for most of them)
    Click Here

  • Solar Panel Array to MPP Wires
    Click Here​
The systems above are designed for offgrid use only.
​If you need a permitted and code compliant 48V system, please check out what I recommend by clicking here.

Direct Download Manuals

MPP Manuals:

800w 12v manual PDF
File Size: 4076 kb
File Type: pdf
Download File
lv6548_split_phase_manual-20201020.pdf
File Size: 7870 kb
File Type: pdf
Download File

12v System Schematic

48V All in One Schematic: Dead Simple!

My loads were pretty small for this system, so 10 gauge wire worked great. If you need a thicker gauge wire, use it! Same with the battery supply cables. Read the manual of the LV6548, and see what it recommends for the input and output terminals. Besides that, just stack the batteries up and connect them in parallel, and you are set!

All-in-one 48V Solar Genator!

This system is smaller, cheaper and more powerful than most on the market. And it takes less than an hour to build. In the pictures below, I connected a LV6548 (click here to purchase) with a single 48V server rack battery (click here to purchase).

Then add your AC loads and charging cable if you wish. Then plug the solar panels into the PV input and you are done! Dead simple and anyone can do it!

If you need more power, you can put multiple all-in-one systems in parallel!
​Or add as many batteries as you please:

If you want to put 2X LV6548's in parallel, check out my complete 48V system blueprint by clicking here

If your solar panel array has more than 2 parallel strings,
​you need a combiner box

This combiner box has everything you need, circuit breakers, invidual fuses for each string, and a surge protection device. 

Just hook your panels up to this box, and connect this box's output to your All-in-one solar input. 

Click Here for Watts247 Combiner Box


Here is a video on how to use it:

All-in-one Solar Power Box Recommended Settings:

These MPP units have a lot of settings! You can go through each setting in the manual and set it yourself, or you can follow the settings that worked well for me below. Your needs may vary, but the settings below are good for most off-grid systems. If you have grid power connected, the settings will work great!
In my opinion, the most important setting is the "low DC cut-off voltage". This is setting number 29. You want this to be higher than your batteries low voltage disconnect voltage. 

Most lifepo4 bms cut off at 10.5-11 volts in a 12v System. So I will set the cut off on the inverter at 12v. This way, your bms will never disconnect power from your inverter. If you are runnig lead acid, 12v works well. Double this number for 24v systems.

Step by Step installation instruction videos