system design

Dear all,

as I am new with all Victron components and quite francly electrics in general, I would really appreciate some opinions on my system plan. I have already put a lot of effort into this and read lots of articles and info but in the end every system is individual in itself and I am by far no expert yet.

I am planning to install all this into a bus that I am currently converting into an RV in Germany. I'm saying that to make clear that there is no current "house electricity" in the bus except cables throughout the walls to all appliances and outputs. For all 12V wiring I ran positive AND negative wires, so I guess the Orion DCDC converter might be an unneeded add-on in my case.

I don't really have many specific questions anymore. I was more hoping for someone with experience in Victron equipment to approve/or help improve my plan.

The only specific questions I am left with concerns the 4A trickle charge output of the Multiplus. Is it okay to just hook this up to my start battery positiv or do I need to be concerned about overcharging this battery once full?

I thank everyone who might get involved and look forward to any input you all might have.

Cheers,

Doran

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Hi,

I have a water turbine that is used to power a small kids shack ventilating fan next to a river, the input from the turbine is 2A (fluctuates), 12v. Will any of the charging control module for solar work for such an application? The load is 1.5A and I am planning to use a 12 V lead battery.

Are there CAD versions of Victron components available that I can use as part of my system design? Maybe DXF or other?

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Dear community

We are building a expedition / world traveling vehicle and are now in the process of defining the electrical components. We plan to travel without LPG, therefore we have a extended need on autark electricity (4 weeks autark time).

Our requirements:

- Run 4 induction pads (2 x 3.7 kW)
- Run electrical oven
- Run AC with 1800W
- Run fridge / freezer 2 kW/24h max.
- Run standard washing machine
- Run water heater
- Run 2 diesel heaters
- Run 1 TV 48"
- Run all lights, water pumps, NAS, charge phones, laptops, cameras, etc

- We want to have 2 fully redundant systems 400Ah/24V and 800Ah/24V

Charge:
- Solar with 2,6 kWp panels
- Charge booster (light machine of the truck, max. 100A/24V)
- Land electricity 230V AC
- Land electricity 110V AC

To stay independant, we decided for 1200Ah / 24V battery capacity LiFePo.
We would like to have all components from one provide and are convinced that VictronEnergy is a great partner!

Now my questions:

- What is better: 6 x 200Ah/24V or 12 x 200Ah/12V?
- Would VE provide a list of components and schema how to connect the components?
- What are the most important questions to ask?

Looking forward to feedback

Patrick

Hi there,

I'm wondering if I can get some feedback about my proposed system. Diagram is below. My concerns are about whether I should be using the Cyrix-ct battery combiner instead of an ArgoFET isolator. Should the MPPT controllers feed to the start battery? as well as the house batteries?

Larger version of pic at DC supply and charging.pdf

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We're getting ready to install a new Victron setup at home. The old Trace (before Xantrex even !) finally died, and upgrading is in the winds ...

Being in the US, we need 120-0-120 split phase of course. Can anyone show the pros and cons between the two options here ?

* One large 230V Quattro to take in 240V from grid, 240V from gen (neutral not connected), spit out 240V to 100A autotransformer to sub-panel for two L1/L2 120V supplies.

* Two smaller 120V Quattro to take in 120V each from the two grid L1/L2 legs, and L1/L2 from gen, spit out two L1/L2 120V legs to sub-panel.

Can the devs please add the ability to set end of absorption tail current in the Blue Smart charger lineup when in expert mode? This would be extremely helpful to prevent premature switch to float without relying on fixed absorption and the risk overcharging when doing that.

It appears that this was at least thought of at some point given in the Absorption duration settings it directs a user to disable the tail current setting when using fixed absorption.

If this is done PLEASE allow tail current setting to be dropped below the .50% level that is in the smart shunt (and maybe other products). Odyssey batteries want to see .02% of tail current to end absorption.

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- 3 x Multiplus 5 kW

- 1 X Fronius Symo 10,3 kW

- Color GX

- 2 x BYD Pro 10 kW each

- Bmw 700

- 36 solar panel, each 300 w/peak

- ESS three phase system, AC coupling

during update, activities was going well, but after it was finished, we clear observe some discrepancy between energy in AC out and energy from DC part, as in the attached pictures.

please note that there is an measurement independent from Victron system.

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i am looking at converting my home and business to full solar and wind power. But i but i need some major power for bus fleet 3 buses and soon 2 cybertruck (tri motor) (180*est kwh each) and based on buses using 446 kwh x 3. each charge needs to be at 100 kw/hr each. Plus 360 kwh at charge rate of 50 kw/hr per charger, plus home usage 25kw/day and garage(bus maintenance) using 70kw/day (7am-5pm)(10hrs) so need a discharge rate of approx 400 kw/hr mostly in off peak time 10pm - 5am and 12kw/hr during daylight hours so my estimates say i need 3000 kwh/ 450 kw battery. could you size up a system with 2 wind turbines and solar array plus battery with a option for 2 extra generating sources i.e. GENSET &/ hydrogen

Hello Everyone,

I have just joined this community so please bear with me.

I recently had a battery installed removed from my property as it did not do what i expected off the shelf. It was manufactured by a company called GivEnergy and it was a very poor product with many development issues.

Now i have decided to go out this myself.

I am looking at utilising either the Multiplus or Quattro Units along with Pylontech Batteries and wondered if you had any advice, comments or examples of system design/schematics.

The system is to integrate with an already install SolarEdge 6000 HD Inverter for my PV.

I am looking for storage capacity of approximately 21kw, so utilising the Pylontech 3000 Series batttery. The biggest request i have for the system is having a large discharge power as I have a Air Source Heat Pump which can take up to 5kw for Water Heating.

My idea was to use the Quattro 8000 Unit having the batteries wired in a stack of 8 with a ring circuit back to a DC Distribution. The batteries are to be controlled using a GX Device.

My question really revolves, any lessons learned? Does anyone have any advice on the Quattro and GX Devices.

Am i doing the right thing with this?

Any help is greatly appreciated.

Thanks

Mike

Hello all,

After many months of learning, I have decided to take a stab at designing the electrical power system for our off-grid van. I have a diagram of the system attached to this post below (Also hosted on imgur for high-res).

I have labeled everything except for fuse and wire sizes as I'd like to get some feedback on the general connections before I get into wire/fuse sizing.

A few extra questions/concerns I have:

- I have seen similar systems with 2 POS and 2 NEG cables feeding into the MultiPlus after the Class-T fuse following the positive bus bar. I have also seen systems with just 1 set of cables. For this system, which one would suffice?

- I have seen similar systems with 150A fuses coming directly out of each battery before they join at the positive bus bar. Would I benefit from this or is a 500A fuse sufficient coming out of a parallel battery arrangement.

- What type of solar panel arrangement would you recommend for this system (S/P/S-P)? I mislabeled the diagram (I named it Parallel but it's wired in Series)

This has been an amazing experience immersing myself into an area I knew nothing about just a year ago! This community has been awesome, can't wait to hear back!

Thanks,

Manny

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I'm trying to figure out the best network setup for my 36 ft sailboat before buying the connecting pieces so I don't end up with unnecessary pieces. However, having some difficulty figuring out the best approach from Victron literature. So many options!

I have a Multiplus Compact and a BMV 712 battery monitor installed along with 200 Ah of Relion lithium fePO4 batteries. I'll be adding solar panels and replacing the existing wind charger (we're getting ready for extending cruising, pandemic allowing). I also have a gel starting battery.

I want to connect the energy system information to the Furuno TZTL12F MFD in the cockpit networked with TZTouch2 to iPad(s) belowdecks and have access to programming the Multiplus.

Must I get a Victron Color Control GX or similar to be able to talk with the Multiplus, or will I end up able to accomplish that through one of the other pieces I will end up needing to handle the remaining parts of the system? I'm assuming I will end up with a wired network, but need the Furuno and Victron units to work together.

I don't know everyone else's experience with getting support through dealers, but I've dealt with three different ones, seeking to buy the Multiplus and other pieces, and all of them quit responding once I asked detailed system questions. I sent all of them system diagrams and lists of existing equipment, they quoted a price for the initial couple of equipment pieces, and after I asked question about how to get them to work with solar panels and wind generators, they quit responding to my emails. I don't live near a dealer (the closest is 3.5 hours away), so email is a necessity.

I concluded (perhaps wrongly) that I was too small potatoes to be worth spending the time on. Anyway, was just curious if this was a common experience for small-boat system people.

This is a design for a solution that will NOT be integrated in a VAN power system (read alternator) and the 4 x Victron 100Ah superpacks were chosen because of space restrictions and specific desire not to have additional BMS equipment. All main loads are 12V e.g. lights, fridge, boiler etc and will be connected via a fuse/switch panel and the only 230V requirement is for a kettle/hairdryer and coffee grinder ;) and to charge the batteries from shore when required.

My question. Does it look right and how best can I protect the Superpacks (which will be installed under the bed in the van) from charging damage at low temperatures when passing through the Nordics?

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Hi,

I am looking at using a Pylontech US3000 battery for an off grid system which only has dc loads.

Planned system will be 1 or 2 x Smart Solar MPPT's connected to Cerbo via VE direct, and Cerbo connected to the Pylontech Battery via CAN connection (type B cable per manual).

Q1. Is there any need for an inverter/charger (such as Multiplus) or am I ok to delete this since I don't have any ac loads ?

Q2. Will I need a shunt (Lynx shunt) to connect to the Cerbo to measure battery current for correct operation and SOC monitoring ?

Is there anything else I should be aware of ?

Regards

Scott

Hi all.

I'm currently designing a system for my sail boat that I would like to run a Bauer Junior II dive compressor (2.2kW) from a Multiplus 24/5000. My research so far has indicated that people typically spec a 8-9kW generator to handle the start up current of the compressor. In my case, I won't have any generator.

My research has dug up anecdotal evidence of a 5kW inverter (unknown brand) starting a Junior II with a smart softstart from Hyper Engineering. I'm hoping that Victron inverters, given their capability to do 200% for 30 cycles should be able to start the compressor without issue, however I'd like to be a little more certain before dropping the $$$.

Does anyone know of this being done successfully?

Could the MP 5k still start it, even if the ambient temperatures are a bit higher (40ºC)?

Any help is greatly appreciated.

Regards,

Justin

@Botnic How is yours going?

Hello! I'm new to solar and i want to create a pv system with a EasySolar 48/5000. I have 16 pcs. - 360w mono panels. It will be an off grid system with at least 5kw LifePo batteries (non victron 3,2v, 120A- 16 pcs ). My question is, what BMS do you recommend? Can i use the system without a BMS? What other components from victron i need? Thanks.

Hello,

I am totally new to this matter. I want to install a small solar system with a battery and feed my house grid with the generated power.

I am thinking of using 2x 320Wp panel with 2x MPPT BlueSolar 75/15, a battery (unsure which size), and an inverter - maybe Phoenix 24/250 230V VE.direct?

And to monitor all that stuff I would need a device which is able to handle 3 VE.direct devices - so I would need a Cerbo GX?

Maybe someone with better knowledge can have a quick look and advice me.

Thank you, Jorge

All,

I have knowledge of Solar system but not as detail. I am building my own van and identified below

major Victron products. I need a comprehensive diagram/schematic that show all equipment, wiring connections including, busbars, protection devices, fuses, batteries, voltage regulators, switches and etc. I like to create Bill of Material out of this schematic and use for the installation.

Your help is appreciated in advance

Major equipment

Lithium-Ion Battery Bank(s)- 2 parallel banks, 24V

Total usable battery capacity - 800Ah,20Kwh,24 Volt

Battery Management System - BMS Control Unit

Solar panel - 1 each large, 0.3kW

Solar panels- 4 each medium, 0.24kW (2 parallel sets)

Max. solar power - 1.3kW

MPPT solar controllers- 1x 150/35A + 1x 100/15A

Energy Color Control GX Panels

Charge rate (max.)- 28V, 120A

IDC/AC Inverter - Quattro 24V/5000VA/120

Inputs besides panels

1- Truck Alternator - 24V

2- Shore power - 230 V

3- Generator- 230 V

Output Voltages:

1- Stabilized 24V

2- Stabilized 12V

3- 24V

Hi

Keen on Victron

Looking for confirmation, and a wiring diagram

Having a DCDC charger and solar regulator is OK but I don't think I can run them together with solar and alternator.

First battery is a lead acid for starting the motor and the second battery is a lithium.

Can charge a 12v car dual battery system with both solar and alternator?

Other DCDC chargers are combined and do this

Hi:

GRID IS:

380 - 415 Volt 3-phase at 50 Hz.

-15KW Solar

-24 batteries x 2volt (OPZS 2900 ... must be 200kg or more per battery when acid full)

-3 Phase solar inverter

-3 phase battery inverters

-380/3phase (400 x 3 phase)

380 - 415 Volt 3-phase at 50 Hz.

-Generator connection (25KVA)

I have a SmartSolar 250/100, which has a breaker on the PV input. I am reading that I should also place a breaker between the SCC and battery bus bar, matched to the SCC/cable amp rating.

I have been cautioned repeatedly to turn off PV input before disconnecting battery power or damage to the SCC would quickly ensue. This has me wondering...

If the breaker between the SCC and bus bar trips, disconnecting the batteries from the SCC, and the PV input remains connected, will this damage the SCC?

I searched for an answer, but did not find it. If I missed it, please link the thread and I will gladly go read up on it!

I would like to understand the math or logic behind these recommendations. I understand that 'cells in series' is shorthand for operating voltage.

I assume that this calculation is a balance between maximizing voltage differential to optimize MPPT performance in less-ideal conditions, and minimizing voltage differential to optimize DC-DC conversion efficiency. Is this correct?

The recommendations only deal with 36 and 72 cell panels, I would like to understand the math/logic behind these recommendations so I can understand how it applies to 60 cell panels and 96 cell panels, etc.

For instance for a 24v battery, Victron recommends 144 cells in series. Would 120 cells or 96 cells be less ideal?

Dear all

Can I expand an existing 3phase Quattro system with 3 quattros 48/10000 and 1 battery bank with an extra single quattro 48/10000 for an extra single phase load connected to the same battery bank.

Thanks for the feedback

Jo

VE-direct-drawing-with-Phoenix-charger-12-50-1-inverter-375W-Li-Batt-mini-BMS-MPPT-100-30-Orion-Tr-smart.pdf

I want to implement something along the lines of attached wiring diagram.

I need to be able to crank off house battery in emergency. How would I implement that?

I have a motorhome with an onboard control board that includes charging logic from a mains charger and or solar supply. The current panel control is terribly inefficient and I want to put a 75/10 in there to allow significant charge on dull days, by increasing board voltage/capacity although max current is 10 amps-. Current system charges at 2 amps on the brightest possible day but I can not add a new panel as the vontroller is very limited.

Anyway ideally I want to provide a constant voltage to the board from the Victron, say 13.8 volts give or take, so the existing board could then do its charge thing-split charge batteries and control output to them etc.

Can the Victron 75/10 be set to do this. Ideally there would only be the one pair of connections to the board. Although I could connect load to board and battery output to the battery I would rather not as I wonder wether when I plug into mains and the onboard battery charger is powered it would cause problems.....It also needs to be considered that there is another charge system, the alternater, during drive times, this charges vehicle battery, and leisure battery once voltage is over about 13v.

I have a Quattro 48/10000/140-2x100, a SmartSolar Charger MPPT 150/100 rev2 . with 2 x 3.5kw Kilowatt Sirius Capacitor Module.

I want to download the configurations and confirm that they are correct.

The download is a RVSC file which I cannot open with the VE connect app or software on my PC.

How do I get the configs into a format that I can share them with Kilowatt to confirm the setting are optimal?

I have one SMA SB5.0 and one SMA SB1.1 which I like to use for an off grid system in ac coupling configuration. Both will be in parallel on AC1. I'll use a quattro 24/8000 as the I/C. As the 1:1 rule is met are there any other consideration to observe?