Help choosing Victron Mppt

[sunshine_eggo]

So, i can go with 3 panels in parallel with just one Victron 100/50 SCC ? Not overcharging or burning the equipment? I know they are only 10.77 amps by the sticker, so in theory they should work ok with 50 amps scc. Sorry i am a completely inexpert in solar at present time, just learning. I am running two panels flat on top, and another two sliding over them.

100/50 is limited to 100V on the input and 60A on the input. You're at 50.1Voc and < 35A.

You could, but you would be over-paneled and miss out on about half the array rated potential.

You would only harvest a maximum of 700W out of your 1350W array; however, you would harvest that 700W for as long as your 1350W array will output 700W, i.e., probably for at least a few hours a day rather than just at high noon.

 

[Troady]

Can't have that, need the full power from the array, these 1350 watts for the 4 x 280Ah, and even those 1350 watts, could not be enough to recharge the four batteries if they are very low. Need to split them in two scc them, the 100/50 for two panels and another one for the third panel to get full power to the main bank. Got a Epever 4210 (40amps) already to recharge the secondary 400Ah bank with the fourth 450watts panel.

 

[Troady]

What i don't understand is, the panel sticker says they are only 10.77 amps each, in theory three panels @ 10.77amps x 3 should be around 32-33 amps in total. Victron 100/50 is 50amps. What I am missing here? Just want to know to learn.

 

[sunshine_eggo]

What i don't understand is, the panel sticker says they are only 10.77 amps each, in theory three panels @ 10.77amps x 3 should be around 32-33 amps in total. What I am missing here? Just want to know to learn.

100/50 is 100V MAX INPUT, 50A MAX OUTPUT

The datasheet indicates you can put as much as 60A Isc on the input to over-panel the MPPT. Over-panel = put more power on the charger than it can output.

It will never output more than 50A no matter what.

Power in = power out

Volts_in * Amps_in = Volts_out * Amps_out.

The panel works at a higher voltage than the battery, so the panel has a lower current.

The MPPT is a DC-DC converter. Converters high voltage/low current to lower voltage/higher current.

Clear?

 

[Troady]

100/50 is 100V MAX INPUT, 50A MAX OUTPUT

The datasheet indicates you can put as much as 60A Isc on the input to over-panel the MPPT. Over-panel = put more power on the charger than it can output.

It will never output more than 50A no matter what.

Power in = power out

Volts_in * Amps_in = Volts_out * Amps_out.

The panel works at a higher voltage than the battery, so the panel has a lower current.

The MPPT is a DC-DC converter. Converters high voltage/low current to lower voltage/higher current.

Clear?

Kind of, so in your opinion, wich one should be the best combination to pass to batteries the full power of the array?

 

[sunshine_eggo]

Kind of, so in your opinion, wich one should be the best combination to pass to batteries the full power of the array?

This does require an conceptual grasp of a simple equation.

Do you understand power = volts, V * amps, I?

Do you understand that power in = power out?

Do you understand that V_panel * I_panel = V_battery * I_battery (again, power in = power out)

Do you understand that V_panel = 41.8V and V_battery = 12-14V?

Do you understand that since the above is true, I_panel is less than I_battery?

If the answer to all of the above is yes, you understand. If no, what can I help you with?

I thought it was resolved here until you started asking about single controllers. This thread did not need to go past here if you needed to harvest your entire array:

Post in thread 'Help choosing Victron Mppt'

Oct 7, 2024

For 12V system 100/50 for 2 panels in parallel and 100/30 for 3rd panel.

Thanks, most probably will go this way for the three panels and the Epever 4210 for the other 450 watts panel.

• Troady

 

[Troady]

This does require an conceptual grasp of a simple equation.

Do you understand power = volts, V * amps, I?

Do you understand that power in = power out?

Do you understand that V_panel * I_panel = V_battery * I_battery (again, power in = power out)

Do you understand that V_panel = 41.8V and V_battery = 12-14V?

Do you understand that since the above is true, I_panel is less than I_battery?

If the answer to all of the above is yes, you understand. If no, what can I help you with?

I thought it was resolved here until you started asking about single controllers. This thread did not need to go past here if you needed to harvest your entire array:

Post in thread 'Help choosing Victron Mppt'

Oct 7, 2024

For 12V system 100/50 for 2 panels in parallel and 100/30 for 3rd panel.

Thanks, most probably will go this way for the three panels and the Epever 4210 for the other 450 watts panel.

• Troady

Got it. Thanks.

 

[Suijkerbuijk]

I wil go for Victron 2x150/60 models .
That to about 880watt on a 12v setup .
So your total will be 1760 watts
And u have 4x450 watts panels
So i will use 2x450 parallel on 1 mppt .

Epever the same you can go for epever 100/60 model
Your use parallel so can use it .

You can see that panels are flat and you lose some watts.
Go for the Victron 100/50 model.
That can handel 730watts on a 12 volt base systeem.
So long you stay parallel.
Its more cheap solution.

See that you like to use different banks .
Well than you can still use the
Victron 150/70 for 3 panels .
That do about 1Kwh on a 12 volt systeem.
But that have a big price .

Other cheap way
Use 100/20 models
On panel one mppt
It do about 300watts
Cheap ass solution.
Thare is no limit on Victron use smart ve -link systeem .

You panels will not do the max 450watts.
It will be more around 315 watts to the flat roof.

 

[Troady]

I wil go for Victron 2x150/60 models .
That to about 880watt on a 12v setup .
So your total will be 1760 watts
And u have 4x450 watts panels
So i will use 2x450 parallel on 1 mppt .

Epever the same you can go for epever 100/60 model
Your use parallel so can use it .

You can see that panels are flat and you lose some watts.
Go for the Victron 100/50 model.
That can handel 730watts on a 12 volt base systeem.
So long you stay parallel.
Its more cheap solution.

See that you like to use different banks .
Well than you can still use the
Victron 150/70 for 3 panels .
That do about 1Kwh on a 12 volt systeem.
But that have a big price .

Other cheap way
Use 100/20 models
On panel one mppt
It do about 300watts
Cheap ass solution.
Thare is no limit on Victron use smart ve -link systeem .

You panels will not do the max 450watts.
It will be more around 315 watts to the flat roof.

Suijkerbuijk, spreek je nederlands?

 

[Suijkerbuijk]

Suijkerbuijk, spreek je nederlands?

Zeker .
Ik kom uit Nederland.

 

[Troady]

What do you guys think of this SCC? Look pretty good for two 450 watts panels too, allhoewel do not think the quality can match Victron by far, but got no experience whatsoever with it. It may be worth it.

 

[Troady]

Zeker .
Ik kom uit Nederland.

Aangenam, Luis hier, (Luisje voor mijn NL vrienden), Cubaanse van aankomst maar NL sprekende kaaskop te zijn geweest voor 28 jaren, heb ik in Utrecht, Zeist en Nieuwegein gewoon. VS nationaliteit gekregen in 2018. Wonende te Miami op het ogenblijk.
Hartelijk bedankt voor je hulp.
Kan ik naar je pm schrijven?

 

[Suijkerbuijk]

What do you guys think of this SCC? Look pretty good for two 450 watts panels too, allhoewel do not think the quality can match Victron by far, but got no experience whatsoever with it. It may be worth it.

Junk.
It only have a 60volt pv input on 12 volt.
See the specs

You have to see .
You gone use it on a RV .
In a RV you always have a high humidity level.
Go for a mppt that have a good IP rating for it.
And really only Victron have it .
A ip rating of 43.
For the rest a mppt have solar tracking beult in.
That means how fast it track like a mppt.

I have more solar power on the day and in the winter with by Victron than my epever.
Reason i switch them over.

So do not go cheap it will not be fun if somting burns out.

Than the warranty it self .
5years on a victron and if you pay a extra 10% by official dealer.
You can have 10 years no pain.

Cheap Chinese junk wel the warranty .
Wel we say in Dutch .

Gerantie tot aan de deur

 

[740GLE]

Can't have that, need the full power from the array, these 1350 watts for the 4 x 280Ah, and even those 1350 watts, could not be enough to recharge the four batteries if they are very low. Need to split them in two scc them, the 100/50 for two panels and another one for the third panel to get full power to the main bank. Got a Epever 4210 (40amps) already to recharge the secondary 400Ah bank with the fourth 450watts panel.

You still need to realize that just cause your panel nameplate state a theoretical output of 1350, you’ll never see that in your set up.

Even if you have a 200a SCC that never clips, flat mount panels in a hot environment will prob output only 80% of the nameplate at best, prob closer to 60-70%.

Flat mount is going to really limit your output.

 

[sunshine_eggo]

What do you guys think of this SCC? Look pretty good for two 450 watts panels too, allhoewel do not think the quality can match Victron by far, but got no experience whatsoever with it. It may be worth it.

I have one that looks exactly like that, brand, color, everything. It's a TWO stage charger - bulk and float, i.e., it bulks to the target voltage and then it just floats there. It worked fine for me on a limited basis before I got Victron.

Can only parallel those panels on that controller since the PV voltage limits change with battery voltage.

Mine's from 2019 or so. Newer versions are allegedly 3 stage.

I would not recommend it unless you have no other option due to $ constraints.

Edit:

Proof!





and



I didn't mind it because it worked great for these NMC batteries as the only use a 2 stage charge.

 

[Troady]

Junk.
It only have a 60volt pv input on 12 volt.
See the specs

You have to see .
You gone use it on a RV .
In a RV you always have a high humidity level.
Go for a mppt that have a good IP rating for it.
And really only Victron have it .
A ip rating of 43.
For the rest a mppt have solar tracking beult in.
That means how fast it track like a mppt.

I have more solar power on the day and in the winter with by Victron than my epever.
Reason i switch them over.

So do not go cheap it will not be fun if somting burns out.

Than the warranty it self .
5years on a victron and if you pay a extra 10% by official dealer.
You can have 10 years no pain.

Cheap Chinese junk wel the warranty .
Wel we say in Dutch .

Gerantie tot aan de deur

Ja zeker, begrip ik wel. Bedankt. Will sell it in Craig list.

 

[Troady]

You still need to realize that just cause your panel nameplate state a theoretical output of 1350, you’ll never see that in your set up.

Even if you have a 200a SCC that never clips, flat mount panels in a hot environment will prob output only 80% of the nameplate at best, prob closer to 60-70%.

Flat mount is going to really limit your output.

I can mount then with hinges capable of 45 degrees inclination. Really need every bit of power i can get.

 

[AntronX]

it worked great for these NMC batteries

what equipment are they pulled from? specs and price?

 

[Troady]

I have one that looks exactly like that, brand, color, everything. It's a TWO stage charger - bulk and float, i.e., it bulks to the target voltage and then it just floats there. It worked fine for me on a limited basis before I got Victron.

Can only parallel those panels on that controller since the PV voltage limits change with battery voltage.

Mine's from 2019 or so. Newer versions are allegedly 3 stage.

I would not recommend it unless you have no other option due to $ constraints.

Edit:

Proof!

View attachment 249084

View attachment 249086

and

View attachment 249087

I didn't mind it because it worked great for these NMC batteries as the only use a 2 stage charge.

Thanks for your help.

 

[sunshine_eggo]

what equipment are they pulled from? specs and price?

Bruh... don't forget... you asked for it...

Thread 'NMC Bank, Bus Bars and Batrium Love'

Jul 1, 2022

It has been years in the making, but I finally have the NMC battery poised for deployment... (okay, only half, but still).

Summary:
7X Ford Fusion/C-Max Energi PHEV batteries, 7.6kWh rated per pack.
Each battery: 84S 25Ah 3.7V NMC cells. Four subpacks of 21S in series
Packs have tested 19-24Ah
28 total subpacks (modules), packs of 4 pictured below:



Config:
21S modules disassembled, cells flipped to the same polarity and reassembled into a 21P module.
Cells connected with custom Aluminum bus bars (.25" x 1"), 21 holes each, 2 per module, 28 bus bars, 588 holes...

• sunshine_eggo
• Replies: 74
• Forum: Show and Tell

• 

 

[Troady]

Are Victron scc second hand any good? Does Victron have sales on black friday?

 

[740GLE]

I can mount then with hinges capable of 45 degrees inclination. Really need every bit of power i can get.

Even if panels are at perfect aligned you’re still going to get about 80% nameplate in real world output.

Just get your expectations ready when you try and turn things on.

 

[740GLE]

Are Victron scc second hand any good? Does Victron have sales on black friday?

Sales are pretty rare, they control reseller prices very close, over the past year they cut their prices.

That’s why If it were me I’d save the cash and get a single 100/50 and be happy.

 

[Troady]

Even if panels are at perfect aligned you’re still going to get about 80% nameplate in real world output.

Just get your expectations ready when you try and turn things on.

They are 450 watts max output, I am expecting to get 400 watts from all four of them, 1.6 Kw, at least in the best hours of sun during the day. I can always adjust my comsumption turning off the minisplit and cooking with propane if needed, but expecting to have at least 6 - 7 Kw power everyday from the Sun. Hope to achieve it. I am new in all of this, don't understand fully many things about solar yet, and i suppose it's gonna get worst been 65 and getting older by the day, not younger. But with daily use and twicking here and there, expect to get as much as Sun and system can afford to give me. I am planning to go from Miami to Argentina by road for the next 5 - 6 years, Central and Southanerica does have good Sunrays everyday, excepts in the South of Southamerica where inclination made Sunrays go like in North of US or Canada.

 

[sunshine_eggo]

Even if panels are at perfect aligned you’re still going to get about 80% nameplate in real world output.

Just get your expectations ready when you try and turn things on.

Along these lines and using numbers published on panel datasheets...

When you look at 75°F ambient temperature and the specified NOCT or MNOT cell/module temperature specification, there's about an 8% drop in Vmp as a result of increased temperature, so in perfect 1000W/m^2 and 75°F ambient conditions, heating of the panel will penalize performance by 8%.

Couple that with the fact that 1000W/m^2 is pretty rare, the ~80% number is pretty good.

Panel datasheets also specify NOCT or NMOT performance values, and they are always worth checking for sanity. They assume 800W/m^2, ambient 20°C, cell/module of around 45°C and a breeze cooling the panels that represents more typical and conservative real-world performance.

This page loaded very slow for me, but here is the datasheet:

https://www.segsolar.com/Public/Uploads/uploadfile/files/20240517/SEG445460BMAHV166EN.pdf

They are 450 watts max output, I am expecting to get 400 watts from all four of them, 1.6 Kw, at least in the best hours of sun during the day. I can always adjust my comsumption turning off the minisplit and cooking with propane if needed, but expecting to have at least 6 - 7 Kw power everyday from the Sun. Hope to achieve it.

This is very optimistic. My array is in Arizona high desert with thinner air and I typically get 80-85% with a near perfect tilt this time of year.

You should plan for the 338W listed on the datasheet and be thankful when you get more than that. For me, good days are 10-15% higher than NOCT.