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.

Ik ben onderzoek aan het doen naar energieopslag afkomstig van zonnepanelen, en een off grid systeem.

Ik heb al een bestaand systeem uit zonnepanelen en een omvormer die de spanning van de zonnepanelen omzet naar 230 V(AC). Na deze omvormer wil ik de quatro omvormer toe passen. De bedoeling is dan dat de spanning uit de omvormer hier op aangesloten wordt en deze vervolgens de accu kan opladen met 48 V(DC). De rest van de spanning moet kunnen worden gebruikt voor eigen gebruik, en als er dan nog rest is moet dit terug worden geleverd aan het net.

Hierbij is het ook de bedoeling dat bij een stroomuitval de accu er voor zorgt het bedrijf voorzien wordt van stroom, hierbij moet de 48 V(DC) van de accu omgezet worden naar 230 V(AC)

Is dit mogelijk, zo ja hoe?

Als dit niet mogelijk heeft iemand dan nog andere mogelijkheden?

Ik zoek dus een systeem zoals hieronder maar dan zonder generator en dan bij spanningsuitval dat de accu het overneemt

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Equipment:
Not so new but still good Trojan deep cycle 6 volt large battery bank (12 units),
Charging system:
Solar panels, micro hydro electric,
New Genset Honda 2200W Inverter connected to battery charger.

I can't get the charger to stay on "Bulk charge" like it should. The built in charger kicks off quickly to taper down to float charge way before the battery bank is not even close to be charged. It usually kicks off Bulk charge in about 5 minutes.

• I keep the multi control setting at 18. (Could it be higher with 2200W genset???)
• Solar panels/micro hydro seem to charge the battery bank no problem...

Possible causes of charger Bulk charge issues?

1. My guess is the battery bank is getting old and I need to readjust the settings (INFO PLEASE...)
2. Wrong charger settings? (INFO PLEASE)
   
3. Bad connection? (checked everything)
4. Faulty temperature sensor? (Checked connection) (Should I disconnect it for test?)

I disconnected the solar panel system and getting the same problem...

Thank you Victron. These units are amazingly durable and well built. This community page is well put together AND HELPFUL (I hope!). I will definitely get a new unit if this one ever gives up...

Patrick, Canada

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?

Hi there I am in the process of retrofitting my sailboat with Victron equipment. The first item being installed is a BMV 712 but will be adding a MPPT and potentially a charger/inverter thereafter. There is the factory charger (will the BMV tell me if it is charging to the correct charge profiles or do I need another device to track the charge profile over time). There is a FET Battery isolator wired to the alternator that combines both start and house banks for charging under motor.

Finally are there any resources to help me put together the wiring diagrams (including the required fuses etc) for adding the Victron equipment to an existing setup?

Thank you!

Hello, I work for a solar company and have access to a wide range of Victron MPPT charge controllers. I am trying to remove heavy sulfation off 2 6V Rolls deep cycle lead acid batteries connected in series, by first allowing them to bulk charge, and then setting the current very low, around 0.5A, and keeping the voltage at around 15.5V for a week or two. Is there any Victron controller which can maintain this current and voltage for a long period of time? Thanks

Good day,

My Bluetooth MTTP 100/30 tells me that the battery is "off". What does that mean exactly?

The battery is connected as usual and works just fine. The charging does not though...

Thanks for your help!

Hi all, I have a stand alone solar setup on my truck for the last 12mths, it is not used everyday, most of the time it's on standby.

Setup: 120w solar, 2 x 120 amp AGM exide batterys, 1x 75/15 victron mppt, 1x victron battery temp sence.

Ive noticed lately i have a large voltage drop overnight, I checked a few hours after sunset and it read 13.19v, the victron data screen minimum battery voltage next day levels are around 12.86v,

Exide battery data suggests absorption voltage 14.1 - 14.4v so I left the mppt on default.

Unit is not connected to a earth chassis.

I'm a bit concerned and don't know what's happening or is this normal.

Please confirm that my wiring on left for my bank works.

Trying to work out if my green, orange and blue lines (and single red and black lines) match what the manual suggests. The series and midpoints links don’t allow connecting midway on cable, so I placed on one side. For red and black, use same terminals as inverter.

1, 2 and 3 (blue) are the 3 battery balancers.

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I have a Centaur 24/60 battery charger and all FLA batteries - three banks. I'm thinking of drop-in replacing with LiFePO4's... Does anyone know if this charger can be set to correctly charge this chemistry if standardised across all banks? I've spoken to two Victron reps and neither have any idea. It would seem from the manual that the best option would be the GEL setting.

Equipment: 1 x EasySolar 24/3000/70-50 Color Control GX; 2 x AGM 110 Ah 12V; 4 x PV Panel 330 Wp; Grid connected

Settings: EES with feed-in excess solarcharger power, phase compensation; min SOC 20%; Batterylife state: self-consumption; Grid setpoint 0W, scheduled charging disabled

Situation:

I have just checked the data of the first 2 weeks of operation: I have

- solar production: 79,5 kWh

- direct use of solar: 17,5 kWh

- solar to batterie: 25,5 kWh

- solar to grid: 36,5 kWh

- total consumption: 37,0 kWh

- direct from solar: 17,5 kWh

- from grid: 1,5 kWh

- from batterie: 8,0 kWh

So I put 25,5 kWh into the batterie and got only 8 kWh out! This is a poor efficiency of ~ 30%!

Is there any change in the settings possible to improbe this rate?

I have a system that includes the SmartSolar 150/70 networked with a Venus GX and BMV 702. The battery is 24 volts and 258 Ah. The charge controller consistently switches from Bulk to Float seemingly prematurely -- when the BMV indicates that the battery is at around 81-82%.

The battery has a charge limit voltage of 29.2, but I have tried to be conservative with my max voltage setting for the charge controller -- I have it set to 29.0 volts currently. I understand that it shouldn't charge to 100% with that setting (nor do I want it to charge fully out of battery care considerations), but I should think that it ought to charge higher than 80%. Based on the history, I don't see it touching 29 volts even momentarily which might cause the battery to trigger the mppt to change to Float. It seems to get no higher than around 28.8 or so.

Any suggestions? TIA!

Hello, I have several solar panels and three different Victron Blue Solar chargers, a MultiPlus 12/3000, a BMV712 and CC GX installed. For the last several weeks I noticed that the Li Battery gets less and less charged, the charge cycle turns off at 93.5% by now. The charge slows down once the battery voltage on the BMV reaches 14.2V, though for the parameters enabled it should stop charging at 14.4V after three minutes.

I am looking for recommendations to charge the battery up to 99.5%, as it had worked like this for the last two years.

The only change in the installation is the addition of the CC GX and I replaced the MasterVolt inverter with a Victron MultiPlus 12/3000 (however, the unit is turned off most of the times), only the solar chargers are always on.

The system has worked very well so far, and I paid little attention. I also upgraded the firmware changes, as they became public. Since this is a gradual charge degradation, I wonder if any of the firmware changes causes this behavior.

please comment on best method to use to charge four 12v marine batteries in series with solar:
1. connect all solar to one mppt controller and charge entire battery bank at 48v.
2. connect individual solar panels to four smaller 12v mppt controllers and connect each to one of the four batteries to charge.
so i guess my question is do batteries vary enough through use over time to benefit from charging each individually even though they are in series. each battery would have its own mppt controller to maximize charge. is this practical or even benefiting the batteries longevity as opposed to charging all at 48v from a larger controller?

I've seen a little too late that my AGM is recommended to be charged at 14.4 V absorption, but I gave it 14.7 V for the past two days. Could this have done substantial damage, or is the damage likely relatively small (like reducing the expected lifetime by <1%). Is there maybe a comprehensive guide to lead acid batteries in the literature that discusses such details? I'd welcome pointers to the literature.

Although 100% of the battery on the display of my CCGX appears, only 5 watts are charged into the battery (see picture below). On the other hand, the view on the CCGX indicates that far more watts are being fed by the photovoltaic system. Of the two feeds on MPPT 150/35 and MPPT 100/15 come 92 and 70 watts. So I think that more than 5 watts should actually be fed into the battery. My question therefore: Are any other settings to be made somewhere? If I do the transmission of data to the CCGX via the BMV 702, then I have 100% on the battery indicator, but only a charge of 5 watts. If I connect the CCGX directly through the inverter (Multiplus 24/3000 / 70-16), then the charge is at 162 watts, but the battery gauge is at 0%. Therefore again the question: Is here something to change in the attitudes or with the connections? Or can you tell me how I connect the individual parts CCGX, BMV 702, MPPT 150/35, MPPT 100/15 and MultiPlus 24/3000 / 70-16 with my LiFePO4 two pieces 160 Ah?

There have been several posts here about the right settings for Victron products with Renogy batteries. Most of the answers have been estimates and there has been very little documented from Renogy.

Renogy recently introduced a new MPPT/Isolator charger (DCC50S). What is interesting is that in the manual they give the following charge parameters:

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Based on this chart would it be safe to say that setting the following would be the best course of action for these Renogy LIoN batteries?

Absorption voltage: 14.4V

Maximum absorption time: 1 hour

Float voltage: 9V (since that is the lowest it can be set. I've been using 13.6V)

Equalization voltage: 14:4 (just in case it gets set to equalize - that button is easy to hit on the mobile app)

Automatic equalization: Disabled.

Thoughts?

I have 4x 100Ah AGM batteries as service batteries in my boat, in a 12v system, There are however 3 different charging inputs. No. 1 Via the engine (80Amp engine alternator to a Victron 100-3 Battery Isolator to the service batteries main switch to the service batteries). No. 2 Via a Victron IP22 12v 30/3 battery charger. No. 3 a 100W Victron solar panel with a Victron MPPT 75/15 solar charge regulator. In normal circumstances, all 3 charge inputs would not be on together, but usually it would be a combination of No. 1 and No.3 or a combination of No. 2 and No. 3 and at night just No. 2 when connected to 220v shore power.

One conclusion that could be drawn is: I like Victron products!

But, I find it very difficult to determine all the setting for the BMV700 as well as the MPPT solar monitor in regards to charge voltage, absorption and float voltage and some I don´t understand at all, i.e: bulk and absorption time limits (MPPT monitor values) and is the MPPT monitor maximum current, the same as that of the BMV700? I find the Victron manuals very limited in that respect, hence I revert to this forum

Thank you,

Marco

Whats the difference between battery sense with a black cover and the one with a blue?

Looking to upgrade a RV to lithium. I have 4 120AH 12V LiCube LiFePo4 Modular batteries (http://filimatic.si/wp-content/uploads/2014/09/LICUBE_traktion_GB.pdf). What Victron Multiplus charger/inverter would work with these 4 batteries?

Hey guys I don't want to blow anything up but I got a hold of a 12V Lithium Phosphate battery along with a SmartSolar 75/15. I also have a separate 24V AGM battery bank from a another SmartSolar 75/15. I only have 2x 265 Solarworld 24V Panels running in parallel (more amps). Currently I'm swapping PV connections every other few days. My question is what will happen if I made a Y connector for 2 solar charge controllers running off the same PV. Is that even possible? I don't want to separate the 2 solar panels just to adjust to one battery bank system. Thanks in advance for the much needed help! Take care all!

I have a remote cabin which is not connected to the grid. I have several batteries of different sizes for different equipment, Tractor, mower, ATV, etc. If i dont use the equipment for a while, the batteries drain, especially over winter.

What is the best setup to keep all the batteries topped up?

Can i run several BlueSolar PWM controllers from one solar panel?

Thanks

Ian

Hi again everyone, my dads system now has a 65A disconnect on the inverter, set at 24v cut off.

Could anyone help me with the relay trigger function please?

I'm my previous post I was asking about the mppt 100/20 triggering a battery charger, would the alarm trigger stay active until the battery bank has recovered to 26v or is it a momentary alarm?

The idea of the system is to have it automated so my parents have minimal interaction in the winter for recharging.

They have a 24/8 blue charger from victron but unfortunately it isn't bluetooth, so I'm thinking a coil relay triggered by the alarm output would cover recharging if it's possible?

Many thanks for reading

Simon

I have four 6v Trojan AGMs equaling a 450A 12v system with a 100/30 MPPT.

I am not sure what I should set my Maximum absorption time to. Right now it is set to 6 hours but on the Trojan website it looks like they are recommending 2 hours for “Maximum Absorption Phase Time” . Am I reading this correctly? Should I change it from 6 to 2 hours?

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Hi all, sorry for all the questions recently.

My dads 24v battery bank is made up of 4 12v agm batteries, they're series parallel linked.

They're charged from 400w of solar panels through a victron mppt 100/20.

I've just checked the voltage of each agm battery while near float voltage of 27v, all the batteries are around 13.50v but one is showing at 15.20v. I'm not sure how this is possible?

Would this be an internal battery failure or am I missing something.

I've tested this on 2 multi meters, but the readings are the same.

I've seen batteries fall from failure but never increase their voltages. Many thanks yet again.

Simon

I am using the Orion 50 buck boost to charge my winston lithium battery pack. The bms shuts the Orion off in and over charge event. Setting the output voltage to ~95% soc should protect the pack sufficiently, however does anyone know if this will be ok, or has tried it before? The lack of any charge algorithms concerns me.