2023 400 with the 400 ah Lithium mod. Victron Inverter.

rh5555

Bad news regarding the Renology 300Ah batteries:

Cant beat the price . They are approx $1 . per AH (as of 8/2025). So , right around $900. for 900 AH .

Price has almost tripled since then...  LiTime has this offering at only twice the price.

AnOldUR

rh5555 said:

Bad news regarding the Renogy 300Ah batteries

For what it's worth, Dr Prepare batteries are made by Renogy. Their 300Ah LiFePO4 is now listed at $345 before discounts that are available. 

https://drprepare.com/products/12v-300ah-lifepo4-lithium-battery-compact-size-10-year-warranty

400Family

Hammick said:

elbolillo said:

Hammick said:

Guys I just purchased a '23 400 that had the Lithium upgraded done immediately after purchase.  They added a solar input port close to the shore power input and installed an additional CC for it.  It's a Victron 75/10.  We currently have it opened up for cleaning and inspection so if anyone needs specific photos let me know.

The additional CC was installed just below the fridge on the left side.  The original 75/15 is under the bed.

Please send all the detailed photos of the install as you can. I would love to see how it was done.

Great pics.  Thank you!  Is there no battery disconnect switch in this setup?  I don’t see any wires running toward the storage area. 

B0atguy

What an awesome setup.  I just came across those same batteries while doing my research into the upgrade so I’m glad to see someone with experience.  I have a 2023 tab and am most likely going to move forward in the coming weeks.  I have a couple questions.  
1. Renogy specific, can you set an AC input limit like the Victrons?  For example could I make it so the inverter only pulls 1000 watts from shore power and supplies the rest of the needed energy from the batteries?  

2.  More general and probably kind of dumb, but is any extra wiring needed to allow the inverter to power the rest of the trailer including the AC? I know the inverter I have now that came with it only powers a couple outlets so will any extra wiring be needed?   

Thanks in advance! 

J

Sorry for the late reply @400Family . Been out of the area for a few days . Was at the NuCamp factory in Ohio yesterday and today actually . Just getting some service and warranty work done .
 
Anyway , I do not believe the Renogy inverter has the option pull a certain amount of wattage from shore power or batteries at a specific wattage . There is a setting to prioritize the 120 draw from A/C directly , or battery power via the inverter . I just have mine set up as the default to pull directly from the 120v A/C and power evrything when the unit is plugged in , and charge the batteries at the same time. Have the charger amps set at 60amps . (can go as high as 75) . I also still have the factory converter charger as a backup that will charge at 55 amps via a dedicated breaker in the ac /dc panel .  Dont use it often , but is available as a backup battery charge source should the Renogy inverter fail . 

Yes, there is some wiring involved to power the whole camper via the inverter . This only works provided you have enough battery ah  and inverter power . At least 400ah should be fine and 3000w inverter. The inverter has a transfer switch built in and a charger . The 120v input wiring that comes from the camper "plug in " inlet needs to run directly to the input of the inverter , then the output of the inverter will run to the ac/dc converter like how it was plugged into the input of the camper . Essentially , the inverter is just in-between the 120volt inlet and the factory ac/dc converter panel . I also did some wiring to separate the original powered outlets from the 1200w inverter to its own breaker , and have the converter battery charger on its own breaker so I can turn it on or off at will . 

One thing that threw me a bit with the Renogy inverter is that there is no 120v pass through voltage when the inverter is not powered up . Not a big deal now that I am used to it . In other words , when the camper is plugged into 120v power nothing will work yet until you "turn on" the inverter . Once the inverter is powered on , it will allow the 120v power "through" the inverter to power up the camper and charge the batteries . Not sure if the Victron Multiplus is like this or not. .

Let me know if you have anymore questions ! 
Oh , Just an FYI - pretty much all the info and any pictures in this thread are ALL from T@B 400's . The 320 has a lot less battery "area" to work with , so not sure how people are setting the 320's up with batteries and inverters ? 

B0atguy

rh5555 said:

Bad news regarding the Renology 300Ah batteries:

Cant beat the price . They are approx $1 . per AH (as of 8/2025). So , right around $900. for 900 AH .

Price has almost tripled since then...  LiTime has this offering at only twice the price.

That price was not for the Renogy 300ah batteries (which I believe are almost the exact same thing as the cheaper 300ah batteries) . The $1. per AH I am using are Dumfume brand . They are still pretty close to that $1. per AH price . That said , there are a LOT of these 300ah batteries that are all Chinese and pretty much exact copies of each other (just look at the measurements) . I have approx 1800ah of the dumfume 300ah batteries running in 2 different RV's and they are working pretty great . 

B0atguy

For anyone who is interested in purchasing lithium batteries .........this is a GREAT tool to help find the best prices . Customizable for different ah too . 
https://batteryfinder.net/index.php?volts=12&capacity=3&multi=1