Can I use 24 volt solar panels to charge 12 volt batteries through MPPT Controller

I’m trying to spec a system using all Victron kit and looking at the 100/30 MPPT charge controller. Does that controller accept 24 volts from solar panels and charge 12 volt batteries?


thanks

stevecounsell asked
Trina commented ·

2 Answers

Wind Turbines and victron charge controllers

hi, i would like to know if victron mppt charge controllers support wind turbines? if yes could i run 2 controllers in parallel, one with solar and one with a wind turbine?

Thanks

Lief.

lief ryan asked
houser edited ·

11 Answers

Installing the Multiplus 3000

With a 50 amp electrical system in my RV, I'd like to install a Multiplus 3000 inverter/charger. I have three Battle Born LiPO4 batteries in parallel. My shore power is a 4-wire and there are two legs on the distribution panel. One of the companies that sells Victron adds a "Smart Phase Selector" in their 50 Amp RV upgrade. Can I install the Multiplus 3000 without this added device?Will the inverter/charger work in this regard?

cgjog182 asked
Tom answered ·

5 Answers

What is the password to edit VE.Bus MultiPlus settings on VictronConnect?

MK3 multiplus v5.8beta1., mac os VictronConnect. password ?

foto asked
warwick commented ·

2 Answers

100/30 wiring diagram

I brought the 100/30 mppt charge controller wanting a full wiring diagram picture how to wire it up as I'm not sure. solar panels to unit to battery and do I need to put a fuse or circuit breaker somewhere what size if I do any help would be great thanks I have 1 300w solar panel and two 12v batteries

donkeydave1980 asked
Cansin Sari edited ·

2 Answers

Mixing lead acid and lithium

My Lead Acid OPzS battery bank is "becoming smaller" as I continue to load the system more an more. Initially I sized the system for 20% DoD, but now in next winter I am afraid it may reach 40 to 50% or even more.

I have now the chance to get a good priced set of Winston LiFePO4 90Ah cells and I was thinking to build a smaller independent system to offload some of the work of the main system.


I allways thought it would be not advisable to put lithium in parallel with lead acid, but the more I think of it, the less crazy it seems. My LA system is 24V based, the 8 cell Winston would be 25.6V nominal. I would source a 3rd party BMS to manage the lithium. Maybe the BMS can take care of the issues - disconnect in low and high side of the daily swings.

I actually have found a product to make hybrid battery banks (BOS - LE300) so maybe this isn't so crazy after all.


To install in parallel and monitor the 2 strings I was thinking if it would be possible to use a separate BMV on each string (Lithium and OPZS). Is this possible, using 2 BMVs on same Venus device?

Eliseu M asked
mvas commented ·

6 Answers

MPPT 100/20 Lithium Battery Configuration

Hi, I've just connected a SmartSolar MPPT 100/20 (version 1.37 firmware) to a 12v 100AH Lithium Battery and can not find a battery setting to use.


I only have 4 presets (AGM spirel cell, Gel Victron deep discharge(1), Gel Victron deep discharge(2), & Gel Victrol long life (OPzV)


I have the latest Apple IOS, the latest IOS Victron app and connect via Bluetooth . I normally charge the battery from 240V AC with a Victron BlueSmart 30A charger set to Lithium with no problems

Greg asked
K.J Kumar commented ·

6 Answers

Official Depth Of Discharge Recommendations For LiFePO4

Having recently had a 4 x 100 Ah LiFePO4 system installed, I am finding hard to shake off the habits learned from a crappy lead acid system & allowing the state of charge to dip to 50% goes against the instincts learned from past experiences.

What am I safe to use out of these batteries?

Lots of hearsay, not too many hard facts.

Dave asked
murph commented ·

4 Answers

Victron Community Guidelines

Hello and Welcome!

These are some of the Victron Community guidelines. The community is predominantly volunteers, and the vast majority of the answers are provided by enthusiasts. It is not an Official Ask Victron site, for that please use the normal line of support.


Read the Victron Support page, and follow the steps in order

After you have read the Support page, if you believe that Victron Community is the best place for your enquiry, please search the previous posts. If you find your question already answered, please give it an upvote.

If you cannot find a similar question, register an account and prepare your post.

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Try to limit the Subject and first line of your post to a single, short, question.

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This community is intended to become a knowledge base. We want people to be able to quickly search for their question, and find the answer. Ideally the answer is a link or reference to the precise Victron documentation.

To help with this, please keep your posts focused clearly on a single question, issue or problem.

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If you have asked a question, and an answer helps you towards a solution, please click the 'Accept' link under the answer.

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Long, multifaceted issues involving system design, multiple run on questions with very specific installation and nuanced details are not really well suited for the structure of the community. It is best to have a single question with a clear title per post. More complex enquires are best be directed towards your distributor.


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Constantly Improving Documentation

Victron is constantly improving documentation, every single day something is updated.

It is ok to ask questions that may be in the manual, though we ask you to also look yourself, and self-post the answer if you find it before someone else does, ideally with the manual and section reference.

This can help others, and also help Victron to make manuals clearer.


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Choose A Good Topic Title

Please use an appropriate title when asking a new question. “No lights on 100/50 MPPT” is a good title. “URGENT HELP PLS!!!” is not. This helps those who have specific product knowledge find your question to answer, and also others who might have the same issue find it easily later.


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Occasionally Victron will edit questions, topics and answers if we think it will be helpful or add clarity.




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If you would like to help, there is a list of unanswered questions here and normally on the right hand side on desktop and down the bottom on mobile.



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Many Answers

We hope that every question will receive an answer from the community. If you think you can clarify further, even if there is already an answer, please contribute. Other users are able to upvote better answers, or accept the best one (or more).

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Be Honest

We are all here to learn, please be honest with your level of experience and confidence. If you are certain of a solution and a fact, it is ok to say so. If you only think something might be some way, or are just testing an idea, please say that too.



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Please do not ask the community when products, updates or approvals will be ready or available.

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Approvals are often subject to testing and 3rd party organisations that operate on their own timeline.

Thanks for your interest and patience, we want to have these available too!


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More Technical than Business

As a manufacturer our focus is on supporting our equipment from a technical perspective, and rely upon a worldwide dealer network to reach customers.

If you feel very strongly about an experience you have had with a Victron dealer, and think that it is important that Victron knows about it, please direct it towards the appropriate regional sales manager instead of posting it on the community.


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Questions about systems with Modifications and Customisations

Please ask any questions and information that involves anything that touches the ‘unsupported’ side of Victron equipment (such as custom programming, self-made cables, Raspberry Pi, modified hardware, APIs, Modbus TCP, NodeRed, ESS mode 2+3, etc) to the special MODIFICATIONS SPACE.

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This space is also for 3rd party battery BMS integrations that are NOT on the supported battery compatibility list.



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I want to speak to the Manager!

Sometimes there is a problem with the site, or your account, and you might need to speak to the Victron Community Manager. Please follow these directions to get in touch.



A Disclaimer

This is a public community and anybody is able to contribute. Please use the normal channel of support if you are unsure of how to proceed, or wish to escalate an enquiry.

Power systems are inherently complex systems with unknown elements outside of our control, Victron does not validate the information provided here. Friendly questions and suggestions are made in good faith and all electrical work should be supervised by a qualified technician.

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PS - I also welcome any suggestions you might have. This is a live document, so there will be changes:

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Guy Stewart (Victron Community Manager) asked
Guy Stewart (Victron Community Manager) answered ·

11 Answers

Visio stencils for Victron products

Hi all, does any body know if Victron have made stencils for Visio for their Victron Products?

Or if any body else made it and made it free to use.

It makes lite so much easier when making my schematics.

//TAB

vetobus asked
cw8 answered ·

15 Answers

What should I set Lithium Battery Absorption Time to?

They say that Lithium batteries don't need to be charged in absoption mode. I've heard that when charging Lithium you should go from Bulk straight to Float. Will setting the absorption time to zero achieve this? What about setting the absoption voltage to a really low voltage that is never achievable? What do others on this forum know of this? What settings do others use when charging their caravan Lithium battery? MPPT Bluesolar 100/30, Sentry 300AH Lithium, 300W solar.

redrover asked
evanjs commented ·

5 Answers

Can I use an MPPT as a dc to dc charger for an alternator?

Can I use my MPPT 75/15 solar controller as a dc/dc charger to charge from my alternator to my secondary deep cycle battery in my 4x4?

Luke Rossi asked
ttp answered ·

8 Answers

Tesla Model S battery + Multiplus = Can not turn on inverter below 50% SOC.

Anyone else using a Tesla battery? I'm surprised to find that I can not turn on my inverter below 21.8V. Do I have to return this inverter?

The tesla battery is supposed to be 20% SOC at 19V, 100% SOC at 25V. Please help me utilize my full battery. Thanks.

[image]


rockatron asked
Tom commented ·

17 Answers

AGM Battery Charge Settings

I have Victron SmartSolar MPPT 150/60-tr charge controllers connected to 6 West Marine AGM batteries (group 31, 105 amp hr) for a total of 630 amp hrs and was wondering what the charge settings would be on the controller. I noticed there isn't preset settings in the VictronConnect app.

raymanak asked
Mark commented ·

1 Answer

Connecting a charger to Load (Out) side of a BatteryProtect

Hi,

I have two questions:

  1. is a BatteryProtect able to handle reverse current when connected as shown below in case of the BP220? Reverse current would be up to 30A while charging, and Vout >Vin.
  2. In case 1. is possible, let's now now assume the BP220 disconnects due to cell under voltage ( and thus BMS Load Disconnect output being set free floating). When connecting the charger (14.2 or 14.4V) thereafter, what would the voltage drop between Vout and Vin be? Can the BP220 handle 30A reverse current in that case, up to the point when it connects again after 30sec?

Note: the design intent of the layout below is to protect the SmartLithium battery from standby current drawn by the charger in case of cell under voltage. With the original design from the manual, this could only be achieved by a main switch (or pulling the fuse) between battery+ and BP. I cannot use a Cyrix-Li-Charge because my charger applies a IU1oU2oU3 charging characteristic with U3 being below the Cyrix-Li-Charge 13.7V engagement level.

[image]

Image: BatteryProtect Manual figure 5, modified (second BP out connected to 1st BP out instead of 1st BP in as in original diagram).


Cheers,

Stefan

stefancs asked
offhighwayvan commented ·

12 Answers

How many amps should my 100 watt solar panel produce on a sunny day ?

It’s currently producing 17 volts but only 0.8amps ? Is this correct ? It does not charge my leisure battery very well

psuk72 asked
Tom commented ·

1 Answer

Is this wiring diagram for a Lithium Camper scheme correct?

Hello,

I am in the middle of making an elektrical schematic for on of my camperbuilds. In this build I would like to use an lithium battery.


I am using an Liontron 130Amp battery with build in BMS

Victron Smartsolar 100/20

Victron Multiplus 800VA

Victron BVM 712 Smart

Victron Battery Protect 3 x

Votronic B2B charger

300 watt Solar panel


To protect the LifePo4 battery I am using 3 x an Battery Protect in this scheme.


My question is: is this overkill and if not are they in the correct position?


The Votronic B2B charger wich I am using is not working via an battery protect, because it has a build in safety system and it will cut of charging when the temperature or charging levels are getting to high.

Because I am not using an Victron battery :( I can't use an Victron BMS or Mini BMS or VE-BMS etc.

[image]


Now I found another build online, although this is not with an LiFEPo4 battery they are just using 1 battery protect. Mounted directly on the battery +30, I thought an battery protect could only work 1 way, so either charging or de-charging protection? Does this build on the picture below mounted correctly?

[image]


I am looking forward to an reaction! :)

Thank you, Maarten

ogcampers asked
spirou commented ·

6 Answers

Why doesn't the documentation warn that multiple MPPT controllers don't play well together and is there a fix in the works?

I've got a 12v 320Ah Narada Lead Carbon battery bank, a Multiplus 1200/12/50 and 3 SmartSolar MPPT 75/15's connected to 3 separate solar arrays.

The problem I'm having is the MPPT controllers tripping over each other going into float WAY too early. So on the daily chart I'll have one controller yielding as much as 1300Wh while the other two will yield as little as 200Wh each. At the end of the day the battery is not fully charged either.

The dominant controller can be any of the controllers on any given day. The wiring and settings are the same for all three controllers. I guess it just a software race condition which one detects the 1A float first. As soon as is does that 1A load goes to the remain controllers.

Is it possible to have them share better. Does the BMV or Smart Sense Synchronise them at all. As it is they are operating at about 30% efficiency once two drop out.

Seems that only one MPPT controller can be the only charge source in the circuit. Otherwise once any one hits the 1A float threshold it go to sleep and doesn't wake up again. Leaving just one controller to do all the work and the battery no where near charged.

The situation is exacerbated as the Muliplus charger starts up when the generator is fired up. All the MPPT go to sleep because the generator is providing all the charge current. Then when it is turned off often only one charge controller comes back to charge and the other two stay on float even though the battery might only be 30% charged because the float voltage being reached does not wake them all up.

These MPPT charge controllers do not play at all well with other charge sources. Including their own kind. Is there any way to have them act as a simple power supply? That is just providing a voltage to battery and allowing the battery to simply absorb what it can? Or maybe get rid of the 1A threshold or have a timer that checks periodically if the battery can now accept greater than 1A and go back to absorption.

Basically modify the algorithm somehow so they're get back to work when they can. At the moment it's like having an employee that gets things done in the morning then goes to sleep and doesn't bother checking if more work has arrived because the other bloke is doing it all by himself and struggling at it as a result.

Seems theses things are too smart for their own goodand as a result are constantly tripping over each other. After which they don't get up and back to work again for the rest of the day! If it was an employee you'd fire them for not being team players! Lol

Is it possible for me to just move the charge leads from the battery connector to the output connector? If the MPPT can output 15A at say the float setpoint voltage to the output without a battery in the battery connection then that would be better charge controller than all the current "smarts" before the battery connection terminals!

Any solution would be appreciated.

Cheers,

Troy

troy asked
hummingbear commented ·

7 Answers

What happens if you add more solar wattage than the max Nominal PV Power?

Hello,


My victron mppt 100/50 in 12V mode says Nominal max is 700W, but down the bottom it says "If more PV power is connected, the controller will limit input power. "

What happens If I hook up 900Watts of solar to controller? & This is the full 900watts noon summertime.


Does it simple take in 700W & the rest is wasted/left? Will doing this damage the controller?


thanks

jman asked
boekel commented ·

2 Answers

Help me understand the stages of the SmartSolar MPPT?

I'm a newbie to the fancy Smart controller that Victron provides, and I wonder if my charger readings and settings make sense. I'm also not real clear as to how the specs that Crown Battery provides correspond to the settings that Victron requires in their VictronConnect app.

From having read others' experience, I believe I have the settings right, but I'd like to understand their actual meaning!

My setup:

2-100W 12V solar panels in series

Victron Smartsolar 75/15 MPPT Bluetooth controller

Victron BVM-712 battery monitor plus temp sensor

2 Crown 220Ah GC2 6V standard FLA batteries in series

temperature 7°C

This is my understanding of the "bulk-absorption-float" cycle, please advise if I have it wrong...

Charging starts in Bulk mode, with max available current (up to 50A per Crown, but in reality current is limited by my panels to @ 13.2A)

The starting ''Voltage" in Bulk mode is determined by battery state of charge - and it gradually climbs to "Charged" level, which is equivalent to Absorption level (14.22V per Crown specs).

Once the SOC climbs to the "Charged" (Absorption) voltage-level, the controller switches to Absorption mode, which then limits the voltage to no more than the Absorption setting, and varies the current, gradually lowering the current, as the battery becomes more charged (as the battery accepts less and less). Question: does the controller actually keep the voltage at the 'Absorption' voltage-level (Crown calls it: 'Constant Voltage') during this Absorption phase?

When the charge current drops as low as 5A (per Crown specs) the controller should switch to Float mode (Crown: 'constant current'), and (should?) holds the current at 5A, until SOC corresponds to (controller setting of) Float Voltage (13.5V)? Question: does the controller actually stop charging at this point? ie: No 'trickle charge'?

Obviously, this last is one of my stumbling points. If Absorption Voltage is constant at 14.22V, then when the charger switches to Float mode, the battery voltage will read 14.22, won't it? In which case, 'Float' voltage will read high at this transition point? Or does the Absorption charging voltage drop as the SOC gets closer to Float?

So my confusion comes from Crown specs being unclear to me, and names of 'phases' and specifications not corresponding between VictronConnect, and Crown, and the Victron controller not having specified a 'constant current' for the Float mode

As I said, I'm new at this, and my Victron controller readings aren't following my understanding of the way it should work. For example, during the controller's Absorption mode (set at 14.22V in the app), the voltage will read 13.55V at 1.7A, which seems more like a Float to me. It's a cloudy day, but it seems it could be charging at 14.22 at 1.6A, per the Absorption app-setting. Or is this possibly the temperature compensation?

Ii appreciate any clarity anyone can give me on this!

Thanks.

harrycw asked
harrycw edited ·

3 Answers

Comparing BMV 700-702-712

Does anyone know if there is a comparison paper or chart for the BMV lineup? After getting the Raspberry Pi working with my current Victron Controllers I am considering switching from a Bogart Trimetric to the BMV to have that info included in VRM too. I guess hearing that should make Victron happy...


-Bill


bigbillsd asked
bigbillsd answered ·

4 Answers

Will the MPPT 75/15 smart solar handle 2, 100 watt 12v panels in parallel?

I ran the math with the max panel voltage of 18.4v and a 25% safety margin and it looks like it should be okay. I wanted to get real world input. My RV forum is saying I should run a 30 amp controller to handle 2, 100 watt panels in parallel. One will be fixed on the roof, and I'll eventually buy a portable to hook up to it.

zimm asked
esteban commented ·

19 Answers

PIN code when updating new blue smart charger

Not really a question but more of an update. Received a new unit and when I connected the Victron Connect app to it, it required an update from V2.11 to V3.00. Clicked "Continue" and was asked to input the device PIN number. The app suggested 0000 or 1234. Did this and the updated failed due to a failure to connect to the device. Ended up re setting the PIN code using the PUK code on the back of the device. The app confirmed that it had reset the PIN to 000000 - a six figure PIN. Just be aware it is a 6 figure PIN code in these new units, and you should use 000000 as the default and not just 0000 as that will fail.

smudger6635 asked
smudger6635 commented ·

3 Answers

BMV-712 Settings for Battle Born batteries

BMV-712 SOC is always wrong. 3 Battleborn Batteries.

Hello everyone. I sure this has been covered somewhere but I haven’t found the answer yet.

I have the BMV-712 smart monitor and it seems it’s never correct on the SOC. I have charged the batteries several times to full charge. During this process I run nothing off of them and charge them to the point it shows 0.2 Amps or less going into them and 14.4 volts. At that point I synchronize the BMV to 100%.

Now one would think the SOC would go up and down correctly with the voltage but the BMV-712 shows a low SOC all the time.

All of the settings are correct for the battleborn batteries firmware is up to date.

[image]


[image]


[image]

[image]



The system has 800 watts of solar and generator that can charge the battery bank.

[image]


One would think that when the system is charging and it’s only dumping in 10 amps via the generator it would show it’s nearly full on the SOC. But it always seems lower then expected.

[image]

[image]

So if anyone can please give me some ideas on what makes or ideas on what to change or make adjustments to I would appreciate It.

Thanks in advance. Crazy Marty.


crazy-marty asked
sglad answered ·

4 Answers

How do I know when my battery is fully charged? How does the MPPT know?

I have an Victron 150/45TR MPPT charge controller being fed by 600 watts of Renogy panels wired in series.


This is hooked up to two, wires in parallel Renogy 170ah lithium ion batteries.


According to their spec sheet they are "recommended" to be charged to 14.6 volts. I don't want to do that and would prefer charging to 14.2


Looking at the spec sheet, Renogy says the following.


Standard Charge shall consist of charging at 0.2C constant current rate until the battery reaches 14.6V. The battery shall then be charged at a constant voltage of 14.6V while tapering the charge current. Charging will terminate when the charging current has tapered to a 0.02CA. Charge Time is approximately b7 hours. Safe Charging consists of temperatures between 32 ºF and 113 ºF.


Does the battery stop accepting charge from the MPPT once the current has tapered? Does the MPPT know when to stop charging the battery? How do I know when these are full? How does the system know when these are full?


Lastly, what should my absorption voltage and time be? How about the float voltage? Battery University says these batteries should really just be charged in bulk phase to ~90 or 95% capacity and then turn off charging. What does the MPPT aim to charge these at during bulk phase? That doesn't seem to be a setting I can adjust.


Sorry for so many questions, this I am new to all this.

Thanks in advance!

evanjs asked
evanjs commented ·

4 Answers

Max discharge current for AGM Battery bank

Hi All

I have a 6ooAh AGM batt bank on a sailing boat (3 x 200Ah)

What is the max safe current drain for said bank, especially with longevity in mind?

Reason:

I have a 1,6kW 230V AC watermaker and would like to run it off the batt bank through an inverter for about 30min at a time. (and some other power tools on the odd occasion)

I do have a generator so that watermaker can be run for longer periods but for 30min (making 50L of water), it would be very convenient to not use the generator, not to mention saving petrol, fumes, and noise.

I have 640W solar and 300W wind gen which should be more than enough to deal with the discharge, I believe, on a sunny day.

So, is there a rule of thumb for a max safe discharge current for (AGM in my case) Lead Acid Batteries?

My gut feeling is that 300A for an hour on a 600Ah bank should be safe. But then my 2nd gut will freak out when it sees 200A of discharge on the BMV.. Even 100A is a hell of a lot in my mind.

Regards

christo asked
Bill Nichols edited ·

7 Answers

Connecting Multiple Victron SmartSolar MPPT to one Battery Bank

We have a customer who currently has 2 x Victron Smart Solar MPPT Regulators... Both feeding a single battery bank - he also wants to now add a 3rd to the system feeding the same battery bank.

This is only a small system (e.g. MPPT100/15's) - and I know he could just get one large MPPT - however this is not the desired outcome due to different aspects / shading etc.

--

I have been searching and found that there are a few conversations similar to this however no rock solid answers so I have the questions:

1. Is the functionality available yet (July 2019) for the two (or 3) MPPT Regulators to work efficiently in parallel synchronising their charging algorithms rather than one switching off prematurely?

2. What information do the MPPT Regulators "share" with each other if connected via VE Direct Smart Network?

3. Will VE Direct Smart Network communicate exactly the same as using the Cable? Or are there limitations?

ncpw asked
wingphil answered ·

3 Answers

Why is my maximum State of Charge (SOC) stuck at 85%?

The Problem: SOC from the inbuilt battery monitor never goes above 85%, climbing down from 100% at installation. (I think the rotary switch is set to Position 1 battery type - flooded.)

Here's my offgrid setup, installed 2 weeks ago:

PV Panels: 15 Jinko 270w panels in 5 strings of three (in series)

Inverter/Charge controller: Victron EasySolar 48/5000/70-100 MPPT 150/100 Color Control

Batteries: 16 Trojan T105 flooded cell (2 banks of 8 x 6v in parallel) with combined 20 hour capacity of 450ah, or 10 hour capacity of 414ah


Any advice greatly appreciated. Thanks!

John Berger asked
Eliseu M answered ·

3 Answers