Hi folks!

In the southern french Alps (not at sea!) my 30kWh batteries are fed with a MPPT 150/65, managed with a BMV 712 and used by a multiplus24/5000/230 all installed 2 week ago.

How do I force an equalization after topping the electrolite with distilled water?

thanks

Lionel

I've got an IP67 12/17 on a boat, charging two banks of batteries with a VSR between them to ensure both banks get charged. I'm on shore power so the charger stays on all the time I'm connected. Since returning from a cruise - away from shore power for most of three weeks - except for odd nights in marinas. The trip involved a lot of motoring so the batteries were constantly getting charged during the day. Since my return I have noticed a couple of changes to my charger/battery set up. The Bluetooth status used - most of the time - to show that the batteries were in storage mode with a voltage of about 13.7 volts and a small current of about half an amp (this I assume was just keeping the batteries fully topped up and balancing for the small amount of 12volt power that I still use whilst connected to shore power). Now when I click on the Bluetooth link to view the battery/charger state instead of 'storage' coming up I get a the message 'OFF' for about a second before the screen reverts to 'Storage', but the voltage is now only sitting at 13.3volts whilst the current still shows about half an amp. I suppose that the battery banks might be absolutely fully charged which might explain the lower voltage - a voltage that being less than 13.6 would not actually allow the batteries to charge ??? whilst the current is simply what I'm drawing on my 12volt systems which the charger is providing rather than drawing power from the batteries. Has anyone had this same experience and am I worrying unnecessarily?

My Multiplus 3000 puts out a max of 66 to 70 amps in charger mode on generator even though my batteries are down 240 amps.

My battery bank is 630 amps - 12 v

Hi there

I have 4x3.5kWh Pylontech batteries, and they perform very well. This is more or less 280Ah @48V.

On a number of occasions, I have seen the SOC remain at 88% as per the Venus remote console, even when charging at 30-40A (28A is about the C10 rate). Charging at 28A should result in SOC moving up by about 10%/hour or 1% every 6 minutes (more or less).

But SOC never goes above 88% that day. I have observed reported battery volt go up from 50.8 to 50.9 to 51.2, but the SOC remains at 88%. It only ever gets "stuck" at this specific 88% SOC. IIRC 51.2 is about 95%.

Since the battery voltage does go up, I assume the batteries are charging (they are accepting the current). Is this perhaps an SOC algorithm/BMS issue?

I have not been able to test if they stay at 88% longer as well when they start to discharge at the end of the day.

Hi. I have a BVM700 connected to 4x155ah deep cycle gel batteries in parallel So (620ah at 12v) My battery charger, when connected floats at 13.7v. I have set the total AH to 620, set the tail to 1% and the time to 1 minute but cannot get the monitor to indicate 100% fully charged. What am I doing wrong?

The system seems to work fine except for the following issue:

When the batteries are fully charged, the PV input is throttle down to zero Watt. Then it seems that the battery starts feeding the load, until the battery drops a few milli volt. Then the MPPT,s are throttle up again to say about 4KW that charges the batteries and the MPPT' are throttle down again. This cycle repeats throughout the whole day until sunset.

2 x Multiplus 48/5000/70 in parallel

2 x 250/85 MPPT's

2 x Solar MD 7.4Kwh batteries

1 x Solar MD V2 logger (bms)

1 x Color control

8Kw solar panels.

I have a nuwave induction burner that pulls 1300 watts. It is possible to use it with two 170AH Renogy batteries and a Victron multiplus compact? Do I'll get enough output power from the Renogy batteries?

Hi,

I've been using the victron multiplus 3000 in conjunction with two BYD B-Plus L 2.5 in a trailer to take power from grid (16A 230V). But two days ago, the multiplus has stopped charging the batteries and the batteries are completely out of battery at the moment.

On the front of the MP I can see the "low battery" light is flashing but on the control panel it shows the battery is at 100%, as shown in the picture. And I also suspect it is not taking any power from grid...

[image]

I've tested the grid power is the supply is fine. I've also tried switching the MP off and on again but nothing changed. Are there any reasons causing this? Could you suggest ways to fix this please?

Many thanks,

Fred

Hi,

I have a solar panel system with 4 x 150W panels (Voc 22,3V, Isc 9,1A) in series and 2 x 12V AGM 140Ah batteries in parallel controlled by a Bluesolar MPPT 100/50. Now I'm about to extend with 8 more panels of same type and 6 more AGM batteries of same kind as the previous ones. My plan is to make it a 24V system instead and setup the panels as 3p x 4s, thus keeping the panel voltage but increasing the current. I'm wondering is there a way I could use my around 2 years old batteries in this setup or do I need to leave them aside. Can a balancer help me here, I don't fully understand how it works, what would the wiring be? I would like to make a 4p x 2s batteries setup, but if I can't use them I will need to go for 3p x 2s and leave the old batteries to setup a separate system. I would really like to use them and have the capacity.

Thanks,

Markus

Hi guys

I recently bought myself a BlueSolar MPPT 150/35 CC to use in combination with a battery bank, consisting of 2x 6 V gel lead acid batteries (for golf carts): Golf Cart TAB Motion Gel Batteries (https://www.tab.si/index.php/industrial/display_smalltraction/4 ).

Now I ask myself the question how to determine the right determine absorption/float/equalisation voltage for this type of batteries. This link (https://chargetek.com/basic-information.html ) gives like a general rule of thumb for lead acid batteries: 2.25/2.4/2.55 V/cell ==> 13.5/14.4/15.3 V

I found there's a pre-installed program for forklift batteries: PzS tubular traction (1), 13.8/14.9/16.7 V. As forklift batteries are more or less similar to golf cart batteries and these numbers more or less look like the ones I found above, I intended to use this mode. However, I'm not quite sure if the batteries are tubular, and if that even matters.

Is there any other (experimental) way to determine these voltages?

Also, I read that it is not advisable to equalise gel batteries, is this right? Why not?

Thanks in advance!

I have RV w/180 watt solar to MPPT 75/15 controller direct to house batteries terminals. House is two 6v golf cart wired for 12v. I am adding BMV-702 w/dongle. Three cables connect to a common positive post: 1 from positive terminal of house battery, 1 from 12v feed from the engine battery, 1 to the fused 12v/110v charger/LPG generator Parrallax Progressive Dynamics power charger distribution center. Cables are 8awg.

I plan to mount shunt per the instructions (battery positive to shunt, shunt to common post, post to 12v/110 power center). What do I do with the 12v feed from engine battery? It is the primary source for recharging the house while driving. I'd rather not wire the engine battery as #2. The feed is 18 feet 12awg wire.

Thanks in advance for any guidance!

I Have a Motorhome 12V system (2 x AGM 110AH) with 100W Solar via MPPT 75/15, Mains hookup Amperor 3 stage charger and a VSR split charge from the crank battery with standard alternator. There is also a BMV 700 & Venus GX. I am looking at ways to prolong the life cycle of the batteries after the current batteries lasted only one season. I have identified that the VSR split charge is a crude method of charging and could be improved with a battery to battery charge system. There are plenty on the market but I would prefer to use Victron products. I have found a Victron Energy Orion 7-35/12-3 Buck-Boost regulator that looks to be something like what I need but am unsure if it will give a charge quality comparable to say a Sterling Power 4 Stage Battery to Battery charger. I would be grateful for any advice or recommendations on the system and suitable products. Any tips on system setup improvements would also be appreciated. Thanks in advance.

I have the following victron devices MultiPlus 24/3000/70-50 (Product ID 2610 with firmware 159), Blue Solar Charger MPPT 150/85 (VE.Can) with firmware v2.05 and a colour control GX with firmware v2.31. on my color control GX, i noticed when i cutt-off AC-in supply to multiplus , the battery monitor doesn't show progressive rise in percentage when there is solar charge during the day rather there is a progressive decrease in battery monitor percentile on the CCGX. Meanwhile on the CCGX, i selected connected Multiplus as the source of battery monitor. Will updating my multiplus firmware to 459 resolve this issues or is there something i'm not doing right?

[image]

[image]

I installed a Victron 200w Bluesolar panel and a Smartsolar MPPT 100/20 in my Campervan, charging one Victron AGM 110Ah/12V battery (I'm not a heavy consumer on power).

I used the 'Gel victron deep discharge (2)' presetting on the MPPT for this battery. This looked fine to me for my Victron AGM battery specifications.

Until now I was completely dependent on two Victron wallchargers, one 15A used for the AGM battery and a small 4A charger I installed nearby the lead-acid battery of the car.

But now that I am no longer dependent on fixed power and love to stay for weeks at the same location without moving or using the engine, I have to find a way to keep the car battery also fully charged. And this is especially important for the following winter.

Unfortunately, the roof of the campervan is not very large, and together with the 200w panel, roof domes, etc. I see no way to install an extra small solar panel on the roof to topup my car battery.

Another option would be to use my Victron Phoenix inverter and connect the small 4A charger to this inverter outlet to topup the car battery, or is this a stupid idea and not possible

I would appreciate very much your suggestions.

this morning I woke up to a huge number of alarms from my VRM, basically because the system has been discharging for the last 7 days... from Jul 1 and batteries were at 0% !!!!

Id not really been monitoring actively, as at this time of year in southern spain - we get loads of sun, so charge is not an issue (though im confused why Ive not been getting alarms prior (say at 50%)

when Iook at the VRM, a few things look odd...

https://vrm.victronenergy.com/installation/1701/share/a6e5e9e3

prior to 1st july all seemed ok, it was regularly going between 90%-100 doing bulk, abs , float

but after july 1, on july 2 it started keeping the battery % dramatically, and then each day, would only go up a bit... then stop rising, despite solar pv being available... and never got into abs

in fact if I look on the 30 day overview, you can see that except for yesterday, we still were producing the same amount of solar... but the batteries appear to be (largely) failing to charge....

Id be grateful if someone could have a look at the above installation graphs (last 30 day overview and you'll see my issue) - and advise me what to take a look at....

Im really confused.. nothing has changed...

the only thing I noticed is that there was also (coincidentally?) firmware update on 1st July, which is when the problems started!

is it that the batteries having stopped taking the charge for some reason?

would this be the MPPT?

could it be the BMV-702, just acting up an reporting wrong voltages?

what can i check?

for now, Ive put the generator on, even though we have a lot of PV, as an 'emergency' to see if I can get some charge into the batteries, as obviously running this low is very bad....

(of course its sunday, so can't do much today - and not even sure who to call tommorow :( )

any thoughts

Mark

system notes:

24 panels

48v

2 x MultiPlus 48/5000/70-100

2 xBlueSolar Charger MPPT 150/70 (VE.Can)

1 x BMV-702

My CGGX control shows battery charge reducing even when the sun is provding charge through the pv cells. Appreciate any help on why is that.

My bank of 4 GEL 220ah batteries has lost its ability to absorb high amp loads through my Victron inverter. This occurs after only a 10% discharge. I have performed a very slow, deep discharge/recharge protocol suggested by my dealer over the winter and this worked for about 30 days but after a period where mainly on shore power the problem reoccurred when on battery only. Is there a fix for this issue.

Tom

BMV-712 and 75/15 smart solar controllers setup - First we installed two controllers, each hooked up to its own single solar panel to charge three 8D 240 amp hour batteries wired in parallel. Only one solar panel and controller showed amps on iphone app – and batteries did charge. In an attempt to get the other controller to connect correctly to batteries and contribute to the charge, we then added a BMV-712 battery monitor to the setup.

We networked the lot into one network – or so we thought. The non-charging controller/panel set still not showing watts or charging. Also that controller does not recognize the battery monitor – on the app it says add battery monitor to the network (although that controller does see the network). The other controller/panel continues to work and it does show up on network with battery monitor.

We were wondering if each controller needs to be a network of its own and then hook both onto battery monitor making it a single network. Or should the controllers be connected one at a time to the battery monitor.

Can someone please help us determine what is wrong with this setup? WE have no idea how to proceed from here.

Hello,

We're using BlueSolar MPPT 75/15 for solar street light application. The LED source is connected directly to the load output of the charger.

I know, that the Batterylife algorithm is changing the load disconnect/connect voltage thresholds, according to how the battery was charged. But what are the actual thresholds for the 12V system, what is the absolute low/high disconnect/connect voltage and what is the daily increment, if the battery was not charged again?

Knowing this would help a lot configuring the light, taking into account the voltage drop in the cables, and also solving some issues with cases where light doesn't switch ON at all.

Many thanks and kind regards,

Peter

Hi,

I have a MultiPlus installed in a van with 4x150AH (in 2x2 configuration) batteries and an Enerdrive ePro battery monitor (it monitors the voltage and the current via a shunt resistor).

There is also a Record BCDC2420 which charges the batteries from the car's alternator while driving but for most trips this is fairly minor.

It seems that the MultiPlus goes to float early and so the ePro doesn't consider the batteries fully charged unless it's not being used for several days.

Previously there was a Giant IPS2400W inverter and it charged the batteries fully (according to the ePro) eg

https://www.dons.net.au/~darius/vanlogger/graph-2018-07-30.svg

https://www.dons.net.au/~darius/vanlogger/graph-2018-07-31.svg

(Although I see a step in the 31st - not sure if that's the ePro going "close enough" or something else)

eg https://www.dons.net.au/~darius/vanlogger/graph-2019-05-13.svg shows it after the weekend - fully charged at the start but it never gets back to 100%. At the end of the week it's like https://www.dons.net.au/~darius/vanlogger/graph-2019-05-17.svg ie reporting ~85% charge.

I can resync the ePro easily enough but I am wondering if that is the right answer, or if there are some charging options in the MultiPlus I can tweak (I am getting a VEBus cable soon). I would expect the ePro is more accurate than the Victron because it has a shunt meter.

I have a rough schematic at https://www.dons.net.au/~darius/Inverter-Wiring.pdf

Note that the cables between battery and inverter are short (<1m) and high gauge (not sure exactly but approximately the size of my thumb).

Any help much appreciated, thanks.

I recently bought a Victron MultiPlus 48/3000/35-50 2400W Inverter/Charger and a Pylon US3000B 3.5kWh Li-Ion Battery and connected them to a 1kW solar grid connected system (with a 40A regulator). The question is how do I configure the system to prioritise solar charging instead of grid?

Im finding it difficult to find useful information on charging and taking care of my new Lead Carbon batteries. The data sheet doesn't give any info on equalizing. Should I keep my Multiplus settings the same as sealed batteries. I really don't want to damage my new batteries......Martin

Hi. We are a sailing vessel. We have just about every thing Victron and are happy customers.

Everything on our boat is 12 volts. We have 1000 amp hrs of AGM house batteries that are charged from various sources. We also have a separate 100 amp hr AGM battery that is used only for navigation electronics (very small amp draw) It's only source of charge is via Victron Orion Isolated DC/DC Converter.

Is the Orion an appropriate source of charging for an AGM battery?

We ask this with a good understanding of smart charging and various volts and stages of charging process.

I look forward to any confirmation questions you may have and your reply.

Kindest Regards

Adrian Peck

SV Anthem

I would like to confirm if Victron chargers (Quatro for example) is accredited to work with the Sirius Super Capacitor Energy Storage System from KiloWattLabs. Charging Voltage 44VDC to 54VDC (48VDC nom.) This is a new (supercapacitor) battery technology which has less restrictive charging requirements than the existing batteries such as Li-Ion and Lead-based batteries.

I am using the controller with one 12V panel and several 12V batteries. The batteries are all solar system or camper dedicated lead-acid batteries, but they are different ages, makes and capacities so I can not connect them at the same time (right?). So I connect one, when it is full, disconnect it and connect the other - and so on. Can I do this and still benefit from the battery charging profile learning capabilities of the controller? Or can I save a profile for each battery and switch them manually? Do I need to do either?

Hi all.

FYI, I'm an IT guy and an electronics noob, so please be kind. ;)

I've had my Smart Solar 75/10 since 2nd March this year, and it has been great! However, a few days ago, the battery ran completely flat as the battery had not been charged. At the time I chalked this up to bad weather, but since then, the sun has come out and the charge current remains at 0 watts, 1 watt or 2 watts.

Here are the facts of my set-up:

• Two 12v panels wired in parallel, one 10W, one 80W.
• Always-on load of a Raspberry Pi, plus weather sensing instruments and WiFi antenna. Usually draws 0.2-0.3A from the controller's load output.
• Two lead-acid batteries in parallel, 12v 12Ah, and 12v 2.3Ah.
• The controller has not been disconnected or powered down since first installation . The RPi had an uptime of over a month when the battery stopped charging.
• When the battery died and the load was shut-off automatically, I kept the load disconnected to allow the battery to recharge over several days. However, the controller only reported a yield of 3-10 watts all day. Compared to my average yield of 80-100 watts all day.

Here is what I've checked so far:

• Both solar panels are working fine and gave a 20v output under moderate sunlight for the UK.
• I connected the batteries directly to the solar panels with my multimeter in-line. It showed a draw of 3-4 Amps. Immediately I heard a hissing sound like gas escaping from the batteries, and I stopped. Am I an idiot for directly connecting the panels and batteries, or does this show the batteries are toasted and the controller is not at fault?
• I both visually inspected and continuity tested the 20A fuse and it is fine.
• I have reset the charge controller to default settings.

Observations of the charge controller when operating:

• Despite only charging the battery with 1-2 watts, the status of the controller shifted from bulk, to absorbtion and then float within a few minutes.
• When set to 'battery equalisation' mode, the charge current rose to what I would normally expect at that time of day, 20-30 watts.

Apologises if this doesn't really make sense. Please feel free to ask any questions.

James

We have a multiplus 2 48/3000 connected to a BMZ ESS 7.0 48V Li-ion battery. The multiplus has 230V AC power supply and the battery supplies 54V DC, the MK-3 interface is connected to computer and the firmware has been upgraded, however when switching on the multiplus nothing happens. No diodes light up and the computer cant find the inverter.

Additionally we've connected a CCGX with RJ-45 to the multiplus and a VE.Bus to CAN Type B Cable is used to connect the ESS to the CCGX.

Since we can't get any communication up and running we're not able to proceed with the configuration. Perhaps something was set to not allow the multiplus to switch on due to connecting the CCGX to the poles of the BMZ battery for Power Supply. If so how could we reset the Multiplus II inverter to begin over following all the steps in the manual?

Thanks in advance. All insights are greatly appreciated :)

Hi If you look below the charge time for float show as zero, but the battery was charging and it was at 100%. I am using the following

1. Easy solar 3kva/48

2. Have 4 x 12V - 200 ah lead acid batteries

3. in the float charge the charge came to max 54.8V. It had the same reading as 54.8 for about 2 hours till the solar yield went down. It never went to idle status and the data shows as zero

What can be the possible cause for this? Or some setting needs to be changed. Please advise

[image]

Good morning,

I have 1 Multiplus and i want to charge the batteries from the grid when SOC is 40% ( emergency situation when PV pannel is off ).

Can you guide me where should i put my parameters in VEConfig ?

Thank you!

Hi all,

I have a 100 Ah Super Cycle AGM battery, which I am charging with a Smartsolar 100/20.

The guy from the store told me to use the Spiral Cell preset, which sets absorption to 14.7v.

I tried this out for a short term (i.e. < a couple of hours) as I could hear the battery bubbling furiously. I lowered to 14.4v, as it was right in the middle of the documented "cycle service normal" on the Victron datasheet... This also produced a bubbling (sounds aggressive when I put my ear to the side of the battery).

My understanding is "bubbling is bad - no bubbling is good - avoid bubbling"

I've since dropped back to 14v and no bubbling... This seems low though...

I recently bought a second super cycle battery, and immediately noticed that the one I had had for a couple of weeks, with which I had been changing the charge profiles on, was a little bulgy in comparison...

Any ideas?

Thanks!