24v or 12v ?!? ...going in circles ?

[Screwball]

Interesting ! Thank you all for posting

I can physically build just about anything, but struggle with electric/electronics ?: so how is that buffer battery getting charged ? Direct off of the simple orion 24/12/70 converter, or would i need a charger/converter like in the pic ?

 

[GSXR1000]

 

[GSXR1000]

Interesting ! Thank you all for posting

I can physically build just about anything, but struggle with electric/electronics ?: so how is that buffer battery getting charged ? Direct off of the simple orion 24/12/70 converter, or would i need a charger/converter like in the pic ?


View attachment 44607

this is not what you want... this is to connect 2 12v lead acid... no charging at all..
you want 12v supply (more like 13v) all the time

 

[Screwball]

The more I read this forum trying to learn the dumber I feel ? lol
Kinda uncertain times for me (not very well recovering from a broken back) thankfully camping in a friend's backyard right now, but really need to wrap up my system & head for the mountains before it gets 100+° here in Vegas... so I guess 24v main is not as intimidating as I was thinking ?!?
Was thinking to cut corners, but it makes no sense to buy things twice...

So how about twin victron 150/35 (or a single 150/70 ?!?) , a multiplus 24/3000, 8x280ah with overkill 24/8 bms , a orion 24/12/70 as well as a 12v agm as a buffer ? ... or am I missing anything (shunt /battery monitor maybe ?)

 

[Screwball]

Using the online victron scc calculator to re-calculate my two 2s2p solar panel arrays i realized that i probably get away with twin victron 100/30 if I go 24v... (im under 100v but overpaneled a couple watts ... however, I don't expect the 5 year old used and permanent flat mounted panels to deliver 100% anyway)
This would be very nice for the budget ?

 

[GSXR1000]

shunt is a must... you can't use battery voltage... get a temp sensor also and you network your smart inverter and your solar charge controller and they will all know your battery temperature. bms will also stop the charge. so not a must to protect charging below freezing

 

[GSXR1000]

Using the online victron scc calculator to re-calculate my two 2s2p solar panel arrays i realized that i probably get away with twin victron 100/30 if I go 24v... (im under 100v but overpaneled a couple watts ... however, I don't expect the 5 year old used and permanent flat mounted panels to deliver 100% anyway)
This would be very nice for the budget ?

little over panel is no biggy as long as you voltage is within spec...

 

[Screwball]

check out my build for my 2007 octane toyhauler...
it's 12v.. but move a few buss bars and you get 24v.. I want 3x 24v@560ah in my future 5th wheel

Thread 'Just ordered Lifepo4 prismatic cell 3.2V 280Ah lithium lifepo4' https://diysolarforum.com/threads/j...smatic-cell-3-2v-280ah-lithium-lifepo4.14955/

You have a link to your build ? Would love to see it ... or any other similar setup to wrap my head around what I need to buy ...
searching the web for simple schematics to copy ?

 

[GSXR1000]

you looked at my battery build?

 

[Deleted member 9967]

My one contribution to this is to suggest you get a shunt to use as a coulomb meter to measure your amps input and output. I was going nutty without one for a short while. Now I feel safe and confident in what I ACTUALLY have in the tank instead of guessing using voltages.
I use the 300 amp Juntek.
Hope this helps.

 

[John Frum]

There are thousands of happy Victron MultiPlus 3000/12 owners who would say otherwise. In fact why would Victron release their new MultiPlus II 3000/12 in only 12V if this was something that doesn't work or not recommended?

Back in LA/AGM days it was tough to get 300A at 12V discharge needed but with todays lithium batteries this is not a challenge.

3000 ac watts * 1.5 low frequency fudge factor / 12 volts low cutoff = 375 dc amps
375 dc amps / .8 fuse headroom = 468.75 fuse amps.
According to the abyc 4/0 awg is only rated to 440 amps without melting the insulation off 105c rated wire.
According to the nec 4/0 awg is only rated to 260 amps without melting the insulation off 90c rated wire.
I don't want my wire getting anywhere near 90c so I would be looking at 2x 4/0 awg.

For a competing product of very similar specs.
Page 8 pretty much confirms my calculations.
The say 2x 3/0awg or 300mcm with a 500 amp fuse.

https://samlexamerica.com/wp-content/uploads/2020/01/11025-EVO-2212-3012-2224-4024-1220_Hrez.pdf

 

[GSXR1000]

You have a link to your build ? Would love to see it ... or any other similar setup to wrap my head around what I need to buy ...
searching the web for simple schematics to copy ?

710w of solar


SCC (solar charge controller)


tie point to connect SCC, battery and original power distribution panel


12v 560AH battery


24 hour discharge test. 13.8v to 12.1v .... I set my bms to 12.v disconnect for 2 reasons. 1. longer battery life, 2. I have 8% battery left so that I can change my low voltage point and still start my generator. I still got 546ah without using the very top and bottom of the charge

 

[Screwball]

710w of solar
View attachment 44708

SCC (solar charge controller)
View attachment 44709

tie point to connect SCC, battery and original power distribution panel
View attachment 44710

12v 560AH battery
View attachment 44711

24 hour discharge test. 13.8v to 12.1v .... I set my bms to 12.v disconnect for 2 reasons. 1. longer battery life, 2. I have 8% battery left so that I can change my low voltage point and still start my generator. I still got 546ah without using the very top and bottom of the charge
View attachment 44712View attachment 44713

I see another guy that loves his music/movies with a solid bass foundation ?

 

[Screwball]

Found this Victron layout ... just about exactly what I need i guess ?!?

Im feeding into a wfco 8955 power distribution panel ... going to have to remove the converter (looks like the orion 24/12 would fit neatly in its place)

 

[GSXR1000]

I see another guy that loves his music/movies with a solid bass foundation ?

yes I added 2 of the amps for outside I place a 10" outside.. I need to figure out how to mount it outside and stay weather resistant....
I also need to replace the OEM 12 with some sort of sealed sub.. the oem unloads under low bass like movie explosions sound like crap then

 

[Screwball]

yes I added 2 of the amps for outside I place a 10" outside.. I need to figure out how to mount it outside and stay weather resistant....
I also need to replace the OEM 12 with some sort of sealed sub.. the oem unloads under low bass like movie explosions sound like crap then

I didn't want to go overboard, but this ported 12" jbl simply rocks (literally ?) ... very pleased with the sound quality .... btw the battery compartment is just forward of it ...if i measured correctly (?) it should hold 16 x 280ah cells

 

[richard cabesa]

I LOVE a good sound system. But just remember that just because you love a particular artist at a particular time, doesn’t mean I do.
Please walk out of your camp location. If you can hear it more than a site away, it’s too loud

 

[Screwball]

I LOVE a good sound system. But just remember that just because you love a particular artist at a particular time, doesn’t mean I do.
Please walk out of your camp location. If you can hear it more than a site away, it’s too loud

Avid boondocker, so I don't do campgrounds ... I only enjoy my intense music or movie night while out in the desert ... no neighbors in sight ?

 

[HRTKD]

Avid boondocker, so I don't do campgrounds ... I only enjoy my intense music or movie night while out in the desert ... no neighbors in sight ?

Ditto. I don't mind seeing neighbors. But if I can hear or smell them, they're too close.

 

[John Frum]

Don't forget to disable the converter.