Your Solution: Why you should(n't) turn on DVCC with your Seplos BMS.
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- Опубликовано: 13 сен 2024
- We are coming close to an end of testing the Seplos BMS and I want to share two solutions you came up with and how the #Seplos BMS may work with the #Victron system.
In this first video, we will follow your recommendation and turn off #DVCC in the Victron system altogether. With this, the BMS will no longer control the Victron system, charging and discharging. As per manual, DVCC is not supposed to be turned on with unsupported BMSes anyway.
I test and show what I found when turning off DVCC. As with all solutions, it has some pros and cons.
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Man I wish we were neighbors I’d have someone to hang out with and talk batteries the wife is feed up with he batteries lol ..love your systems 🙌🏽🙌🏽🔋🔋🔋
Your brain needs a firmware downgrade!
It's similar for me. I have to set my Charge Controllers (which are reading voltage at the smart shunt) to 55.48 in-order to achieve 55.2(3.45) at the cells. Makes sense with voltage drop and resistance in a large system over all the cables, fuses and breakers. I don't see a problem with it, it's is consistent and keeps my actual cell values at the target voltage.
Hi Andy and thank you again for this video (and all the others too!)😁👍
As I told you in one of my previous comments, this configuration with the BMS which manages the charging system, it works, But!
you can definitely see that it "drives your solar controller crazy" 🤪like: Bulk/absorption...Bulk/absorption...Bulk/absorption...and floating???🤔
For me it is not good, for your solar controller?!🤔
Again, let's not lose sight that the BMS is made first of all to manage the battery pack, to protect it and not to manage
the settings of the solar controllers.
Having carried out multiple tests, it is not always easy to find the right balance of settings for these 2 parts of the system.
(In the end, managing by the solar controller is much better, especially when you have several battery packs connected in parallel)
Thanks again for sharing these tests with us!😁👍
I work with DVCC on and SVS on the others STS and SCS off. The BMS setting is 56.4 and in the DVCC I have 55.2 as the limit, as soon as the 55.2 are reached, the system goes into absorption and then just shovels still Ah in, at the beginning it is still 50Ah/kit, later less and less to almost 0, the battery is then 100% full and the voltage is 55 volts
The BMS never gets into a warning zone and I'm happy with that - let's see what Andy finds out in his next video.
Andy, just wanted to thank you for your charge controller settings. I purchased a brand new 712 shunt from victron and it was behaving erratically from the beginning using standard lithium settings. It would charge to 85%, then all of a sudden show 100%. I was always recalibrating. With your settings I fully charged the battery, recalibrated it and haven't touched it since it's worked perfectly thank you.
Another great video, information rich, thanks Andy for what you do for the community!
Hi Andy, you should get a second “hose” connected to that portable AC inlet , the unit is sending the hot air out, but the same volume of air is getting in the garage by the door, with a second hose the air swap would be minimized increasing the efficiency ( lowering a lot the temperature) 👍
That would not make a difference in the garage, I believe. The garage door is open most of the time anyway, so...
@@OffGridGarageAustralia yes, that’s true , the door open does not help, the massive volume of air being pumped would stop and that will help significantly to lower the temp, also it’s just a few meters of hose , nothing to loose 😉
@@claudioporto5926I understand ur suggestion/argument here, and while ur mostly right these air cons are of the most inefficient type in all regards & I think Andy knows this too. If he was to plumb this unit in correctly & close the door it would still make very little difference to the inside temp of his garage for a number of reasons, but the cool air it delivers will make a difference to his controller temps if aimed at them.
This air con would struggle to do more than a 30-40m2 area if the room was insulated & sealed properly, in his garage environment it would be lucky to drop the overall temp 1 or 2 degree’s.
@@evil17 Considering it's all open, it's just a fan en give cooling when directly next to it I do not think it will effect the inside temperature at al.
Witam !
Kolego, robisz bardzo dobrą robotę.
Bardzo miło ogląda się Twój kanał i to, co tak szczegółowo opisujesz. Pozdrawiam i czekam na więcej.
Lepiej napisz po angielsku lub niemiecku :)
I ended up turning off DVCC and used the multiplus charge settings instead, just seemed more reasonable.
Setting are;
Balancer on & float (v/pc) @ 3.45v
BMS cell warn @ 3.50v
Charger set to 3.55v per cell
Cell OVP set to 3.6v.
That way, it gets fully absorbed, balanced and rests at 3.45v, I might change that to a bit lower in the future though.
I don't charge that high. 3.45V is my max and 55.2V is the charger voltage. After 1h (to allow balancing) I fall back to 3.35V or 53.6V.
@@OffGridGarageAustraliaJust got my V2 Seplos BMS to reset soc without triggering OVP. Clearly there's a setting that's not set right, or you need to charge higher than 3.45. Video on my channel (can't link cause youtube auto deletes)
If you are using a Victron Multiplus you can run V sense wires from the inverter charger to the main +/- terminal on the battery and select that as the voltage sense source. Those wires can be thin because they carry zero current, they only measure the voltage.
Yeah, only the Multiplus is not my point of truth for measuring the battery voltage. That is really the Smart Shunt in my design as it sits closest to the battery and also knows about the current and SOC.
@@OffGridGarageAustralia if the multiplus v sense wires are attached at the battery terminals then that is a superior battery voltage sense regardless of how far away the multiplus is from the battery. With no current ever being carried by those wires, there's no voltage drop. You can select which reference voltage, temp, current sense that you would like to use. I think the Multiplus makes the most sense for voltage and the Lynx Shunt for current and temp, at least until Seplos figures out how to control the Victron MPPT's....
put a Victron shunt at the busbar and be done with it. Victron controls charging, Seplos controls the battery. You're splitting hairs with millivolts if the devices don't have voltage correction as an adjustable setting to correct for line losses from resistance .
This is not cable losses, the cabling is too short for that to happen less than 3M, there is a shunt built into the lynx system that Andy is using. Secondly, the voltage inconsistencies have also been noted and talked about on the Victron forums. There are inconsistent voltages reported by Victron devices. So why put in a second shunt on a system that already has one built in?
@@GapRecordingsNamibia maybe you should learn to use a voltage drop calculator . This is the result I received for a pair of conductors 3 meters in length of 8 awg wire at 56 DC volts. It is exactly the amount of voltage drop Andy is seeing between the devices.
Voltage drop: 0.16
Voltage drop percentage: 0.28%
Voltage at the end: 55.84
His lynx busbar doesn't have a Victron shunt installed yet. He is relying on shunt data from the Seplos BMS that doesn't seem to be working well with the Victron equipment.
Great Video Andy, I wait for the next one, let's see what Andy finds out in his next video. 🙂
Can you just calibrate the voltage reading of the MPPT to the same reading as the Seplos BMS?
In DVCC u can set the source for the current measure and the source of the voltage measure. So u can set (for example) the bms for voltage reading and the smartshunt (not on the battery3.0) as source for the voltage reading.
Hi Andy, thank you for testing this.
What I have done to make sure my batteries hit the right voltage is I have programmed my MPPT to 0.5V higher and my batteries are running fine, scince then, 4 months now, my batterirs are under 20mV deviation for both packs, before, it was 100 to 120mV delta and my packs would never balance.
After 1.5hrs it goes down to the float voltage, this has been running flawlessly, but, I do not have that kind of voltage delta that you have.
So, the deviation between shunt and mppt but, I do not use a shunt, I only use my BMS data and the larger system takes it's voltages from the BMS... I have heard of whacky voltage deveations between victron devices this has been discussed on the victron forums. Good info again as usual.
Thank you. Yeah, I've read the posts as well. It is all clear as mud and very inconsistent. I'm not a fan of setting the voltages higher just to make the system somehow work. I just followed up this suggestion but it's not a great solution.
@@OffGridGarageAustralia I agree, but, that means that there is more room for improvement, Although, I must say, that this is the first time since I've had my batteries that I have not had one cell go over voltage AND that my cells are within the 20mV delta set in the BMS.... Thank you for all your hard work, I would like to see the workaround so will be watching out for the next video..
Good job, info & vid Andy, can u calibrate the Seplos BMS to agree with the Victron Smart shunt reporting, as can be done with the JK BMS? Im not a 100% on board with the accuracy of Seplos battery reporting gear & Victron is ur main tell-all anyhow.
I have the same result with Daly Smart BMS and Victron. The more charging current you have - the more voltage difference. Increasing the voltage for 0.2-0.5V in the MPPT doesn't solve the problem, because the lower the current - the less a difference. If the current is 1A or 0.5A, there is mostly no voltage difference, and your batteries will be overcharged for 0.2-0.5V as set in the MPPT. But if the current is zero and the voltage is different, I think it's safe to just increase the voltage in MPPT. So, there are two ways how to solve it: enable DVCC or buy a SmartShunt. I am going to buy a SmartShunt. But overall the problem is not so huge, because the battery will be charged to the MPPT voltage anyway, but with a lower current, because get an absorption level earlier. So, your batteries just need more time to charge.
The lynx system already has the smart shunt built into it..... So, why buy another shunt???? This will not solve the problem and will only inject more error onto the system....
@@GapRecordingsNamibia I don't know if lynx could be used as a battery monitor for the system. If yes, we could get the result from it. So, we have to have a single entry point for voltage measurement.
I have been watching and learning from your channel for a long time, but have you ever talked about what happens when the CAN-bus connected BMS shutsdown?
That is by far the most negative aspect with having the batterybank connected to your system.
By using the shunt and have no COM to your system, it doesn't matter which one of your packs shutsdown (if not all of them does it :) )
I have the same voltage differences on a 12v lfp system. CC/shunt will always be around .05-.1v higher than what the bms and my meter reads.
Above and beyond Andy👍
Hi Andy,Ich schreib meinen Kommentar mal auf deutsch.Hoffe das ist ok.
Ich hab auch einen Kleine anlage und die Seplos BMS.Hast du schon mal beobachtet das das BMS den MPPT bei 96% SOC auf 10A runterregelt? Habe Parameter 80 Internal Charge auf 99% stehen...leider Macht das BMS trotzdem bei 96% den cut.
Und eine nächste Idee hätte ich noch zudem Balancer vom Seplos.
Es ist ja möglich diese "Active Balancer 4A" wie sie häufig in deinen Videos zu sehen sind ein und aus zu schalten.Auf der Platine sind ja die Pads dafür einfach mit einer Lötzinnbrücke verbunden....Es wäre doch mal interessant die Pads mit einem Relaisausgang von einem victrongerät zu koppeln und dementsprechend den Balancer dann einzuschalten.
Hoffe ich habe mich verständlich ausgedrückt.
LG aus dem Dunklen kalten Germany.... 🙂
Das ist per Seplos Design. Das kann man in den Settings ausschalten. Glaube in den Function Switch settings. Muss mal gucken, welcher da ausgeschaltet werden muss...
Ja, der Active Balancer kann uber das Relais vom MPPT aktiviert werden.
@off-grid garage Die ganzen BMS funktionieren auf dem gleichen Prinzip welche CAN unterstützen - man muss sie so weit hochladen bis der Charge Mos zu macht (hängt vom den Parameter vom BMS ab)... dann gehen die Spannungen zurück und sind quasi auf Float... erst wenn das BMS unter einem gewissen SOC oder Discharge A ist gehen die MOS wieder auf! Lädt man die Dinger nur bis 55.2v welches mit deinem Bulk Absorp und Float Setup perfekt funktioniert zb. bei JK usw. hat man mit den ganzen CAN BMS Probleme da die erst viel Später den Mos zumachen... auch eine Kombination aus SOC, Current under 5A und bei einer gewissen Spannung schaltet der MOS
Andy, thanks for sharing, this is interesting. Maybe a wild guess where your 0.15V is coming from, the resistance in the wires and also the tiny drop of Voltage accross the BMS which is in it's path. If Seplos is measuring the voltage on the batteries and Victron on the output op the charge controllers this is what makes the difference. I agree you might not want to have an offset, in the ideal world the BMS and chanrge controller settle on what they measure, but that would mean both could manage and operate certain parameters together. I think the interoperability if not there yet to the fullest and should be sorted by Seplos.
I think it's because of the temperatures, so the connections should also be provided with a spring washer so that there aren't higher resistances at high temperatures.
The drop of Voltage is in my system only 0,02V so it is like nothing, if not reach the 55,2V for balancing, you can load 55,3V and that help in System with so much Volt drop.
Thanks Andy
Why can't I hook up any power source to my charge controller? The perimeters of solar conections are huge and wide. If it handles anything from 24v to 100v and 1 to 60 amp constantly, with huge jumps and drops of really high current. It just seems like such a good way to clean up any source of power, to a perfect and controlled charge. But I hear to not do it . but can't seem to get an easy to understand reason why not to.
Does the victron charger have a voltage calibration setting of some sorts?
Hey andy what happens if you use a 'Victron battery sense' it exist for 12 and 24v it overwrite the bms...I know it makes it dificult in this setup..but I think if you open it you can use 2 of these...(not sure)
Heya, nice to have a comminutie like you have here
One question. Why do you wat to turn on of balancing so late? I just put at 3.00v and 0.3v of balancing current.
The use of Seplos batteries for powering devices has become increasingly popular due to their ability to store large amounts of energy and discharge at a steady rate. However, one issue that arises with Seplos batteries is the potential for uneven discharge when two or more batteries are connected together. This can lead to issues such as premature battery failure or inconsistent performance. To address this issue, there are several techniques that can be used to ensure both Seplos batteries discharge at the same time and maintain an equal State of Charge (SOC). These include using a balancing circuit, adjusting charge rates, and monitoring battery performance over time.
Are there any Firmwares available for the 24Volt Seplos BMS? I already tried the one from your website, but it seems to have a wrong calculation showing Victron System. Is there another option that I can use?
Thx Andy!
Curious what Seplos advice would be in this case....
Moin, ich verfolge dich schon eine Weile. Sehr Informativ... Grüße von der Nordseeküste
I’m wondering if the raw communications data between the Seplos and Victron equipment can be captured in some kind of debug mode on the VenusOS device side? If so, the data could then be filtered through Wireshark or similar CAN bus specific software to get the protocol messages into a more human readable form. If possible, it would help both Seplos and Victron gain valuable interoperability data from several BMS versions being used in the wild 😉
Good old Victron,
Fiddle fiddle touch - Break! Whatever happened to "plug and play"
hi, maybe it's a good idea, to make movie how you can put the decimals of the numbers correctly, and where you can find the bluetooht app and how to install the selpos bms
the formula for CCL (charge current limit) is obsolete and you can use full charge current of for ex. 200A if you set the switch "Single BMS 1.0C charging" in the blutooth app to "on"
Your amp is the same as the temp here in Norway right now hehe
But soon we are back to -10 just north of the capital "Oslo"
Hope you don't get such a low "amp" 😁
Hi Andy, i am really having problems in trying to get a Sofar ME3000SP to function correctly. I recently put together a Seplos Mason case (the vertical type) with EVE 280cells. All seems to work fine, fires up, returns front screen info and i can access/change info on the bluetooth app. its the latest Seplos BMS as far as i am aware.
The sofar inverter doesnt seem to want to take power from the battery to feed the power required in the house ....
is this because the battery needs to 'reset' after its reached 100% state of charge? if so, how do i do that please? Happy to provide information/screenshots etc for anything you think might be causing my system not to work properly?
Hard to tell. Do you have the inverter connected to the Seplos BMS? What protocol settings in the BMS? Does the BMS shows charging and discharging FETs are on? Does the inverter displays the battery voltage?
Hi Andy. Set your charger 0,1or 0,2 volts higher as 55,2 volts then you will balance your batteries.
I've often wondered why they don't have a four-wire connection to the battery. Using separate measuring wires would eliminate the I2R losses in the charge wires.
That is already an option with the multiplus ii, but it only works to manage charge voltages, which might well work in this situation.
Morning Andy, we have 40 degrees down here today. Hope we have no fires. Hey, did you drill out one of your cells on version 2? As I short one and it is layered in to the lag.
I don't like this whole "the battery controls the charging" thing. I am so happy that my Multiplus II can control the MPPTs that I would never give that up. I recently built myself a Smart Shunt to get a better reading on the currents for the Multiplus and I am completely satisfied with that.
Every part does its thing. Multiplus controls and BMS protects. That's how the gods of PV plants created the world 😜
Yes, absolutely. I just follow up on recommendations people gave and and wanted me to test this for 2 years. I'm not a big fan either, but I think, I have found the solution now...
Is there maybe a option to calibrate the internal voltage reading of the BMS?
or the charge controller..
that seems the one not correct..
i would leave dvcc on andy..
given the difference in voltage i'd rather trust the bms
Hallo aus Deutschland🙋
Habe SPF‘s 5000es mit dem Seplos BMS laufen. Kann ich den VCC auch an den WR übergeben? Oder geht es nur beim Victron?
VG Viktor
Interesting stuff, but that voltage difference is disconcerting and the no float option would bother me. Could you use a victron 'Smart Battery Sense' to get an 'accurate' reading of the battery voltage, and share that on a BT network for the solar charger to use? Also, how close is the shunt voltage to battery voltage measured at the battery terminals? I guess you could share that voltage if close enough? Cheers !
Cani ask. What did you end out doing ? Did you turn dvcc again
There is no V-sense cable from the charge controller direct to the battery terminals, which would solve the problem of voltage drop on the cables.
This setup needs a voltage value send from the battery by "data" (CAN) and if this does not work reliable, the whole charging system will not work as expected.
I would prefer charge controllers with a V-sense cable to the battery. Did you test this type of charge controllers, eg EPever Tracer AN 5420?
Maybe you could compare these type of controllers with the victron controllers in a video?
This is not cable losses, they are too short for this to happen. Less than 3M cable run. These are voltage inconsistencies reported by the devices themselves it has been documented and talked about on the Victron forums.
I would treat the seplos just like any other battery and add an extra Victron smart shunt to measure Voltage and use that in a smart network.
Coming up next...
The whole point was, to use the Seplos 'with its good communication feature' as the battery monitor. That was what people always told me and why the Seplos BMS is so great. I must say, I cannot concur with that 😉
@@OffGridGarageAustralia Yes, I would indeed use the Lynx Smartshunt as a battery monitor. You have already installed it between the input and the output of your new battery system and it is blinking a few videos idly ;-)
Why would you introduce a second shunt when there already is one (Smart shunt) built into the lynx system????? I do not understand that logic..... Makes no sense, all this will do is introduce another error point..
@@GapRecordingsNamibia Watch this space... 😉
Hallo Andy, Du hattest doch mal irgendwo eine Liste mit deinen Einstellungen für das Seplos BMS. Irgendwie finde ich den Link nicht mehr.
Thanks, Thomas. I've never done a list with all settings for the Seplos BMS as I'm still experimenting. But there is a list of all Function Switches and what they mean if it is that what you're after. It's right on my website under the Seplos BMS: off-grid-garage.com/battery-management-systems-bms/
@@OffGridGarageAustralia Hello Andy, as I see English should be the preferred language in your RUclips channel. Yes that is the document I was looking for. The other parameters for voltages etc. I can get from your videos. Greetings from good old Germany.
I do want to disable DVCC but MPPT stays always on external control. Would someone help me with a step by step to get this done correctly? I have a GX, MP2, 150/70, 2x Seplos. Thank you!
On your GX, go into Settings - DVCC - scroll all the way down and turn off the Controlling BMS (set to No BMS Control).
Battery v2 is controlled by the voltage reported by the shunt.
Just do that with Seplos?
just have higher MPPT voltages, I'd trust Victron over seplos coding to control things.
The BMS will stop any voltage spikes - worst you'll end up with is charging being turned off from a high cell voltage.
IF you want to be extra safe, lower to 3.6, or 3.55/cell rather than 3.65 - deal with any high volt, low amp/low loss charge hitting the battery.
Agree to trust Victron reporting over Seplos, but Andy does only charge to 3.45v/cell which does give his batteries a good full SOC at a safer voltage level.
When charging that high, unless you are mobile puts stress on the anodes of the batteries, this is what causes premature battery degradation, I too only charge to 3.45V / cell, I have never seen my cell temp readings go over 35C and that is with high 30C ambient temps..... Also, I am able to get the full 100% SOC from my batteries while running them at a lower temp.
Dont understand how you get 1amp with all that solar in cloudy conditions. I have only 660w on my roof and on cloudy days i still pull in 4ah
This is the test system on his pool fence, not the one hooked up to the roof.
How are you comparing 1A of flowing power with 4aH of capacity?...... That is not the same thing......
What is the voltage measured by the voltmeter at the battery and at the MPPT controller? If they devices don't match can you recalibrate them?
Ideally the measurements by the devices should be within a percentage or two of the voltmeter measurements. If that's not possible I'd say the devices are defective.
As Far as I can see, and, this has been documented, there are voltage sense inconsistencies between different Victron devices, this was published on the forums, not only that, but through my own testing and measurements my BMS reports the closest voltages and MPPT contact to battery contact show the same readings to the 2nd decimal on my DMM. so, this proves equipment differences. This though is not classed as a fault, Victron says choose one source and use that to run the system from, so, I have chosen my BMS.... But this works for me as I do not use a Smart shunt...
@@GapRecordingsNamibia that's pitiful for such expensive equipment as Victron makes and could easily be calibrated for. It should be able to maintain 0.1% accuracy at least.
@@joestockton76 Yes, this is true, but it is what it is, I have 2 mppt controllers both outputs are linked as they are both charging the same batteries but, there is a .5V between them....... Though the outputs are linked via the battery. When I measure with my DMM I get the same reading.. And so this is why Victron says to choose the most accurate device you have and use that to do the measurement and control..... Problem is not many people want to do that... They can't foresee all different outside circumstances snd cater for them it is impossible, what I would say is incorporate a setting to be able to "trim" out the differences in software. this would mitigate these types of outcomes. In Victron, you are paying more for the robustness and reliability of the products, IMHO... I will be posting a video showing all this soon on my channel. It is just one of the more complicated parts of life we have to navigate through.
3:11 Using energy from the batteries to cool down the batteries.
why not.
🎉😎
💙👊😎
Hello guys!
A paranoid man might suggest that Victron doesn't let you use the BMS as a voltage reference because they want to sell more Smart Shunts...
There isn't a good reason for them not to allow you to set the BMS CAN as the source of measurements like the Smart Shunt and still retain control over the voltage set points at the charge controller.
Turning off DVCC will make your system charge your battery from the grid! Be aware of this! I have no idea how to turn off grid charging the battery when DVCC is off. Update: When I disconnect the cable but leave DVCC on, the Multiplus / Cerbo tell me "Low Battery" and use the Grid instead of discharging the battery. The seplos bms tell me the status is "idle", erverything green. What is going on?
Andy 👍, Thumbs up 👍, Bell 🛎️, subscribed 📬
How about other inverter . Not just victron
What about them?
@@OffGridGarageAustralia Andy, I have Growatt inverter. Will I have the same problem?
Turn off limited charge in dvcc. It is not a common setting, see manual
🐸🐸🐸
Andy, there is no perfect. At some point you will have to compromise.
Yes, I'm still trying to understand why a lot of people wanted me to test this BMS because if it superior communication features. Well, I cannot agree to that enthusiasm.
@@OffGridGarageAustralia Unfortunately, there is never a 100% compatible standard. SEPLOS is a complete DIY system as I understand - BMS, steel housing, perhaps cells as well. Should Victron and SEPLOS somehow work together and make them more compatible to one another?
Are you telling a German that he can't have perfect????? What are you doing man????? 🤣😂
@@GapRecordingsNamibia You can't have perfect here in Australia. That is just the way it is.
I know, kinda late, but the voltage issue ... doesn't the smart shunt show the correct voltage and share that to the charge controllers?
Not when you have a Smart BMS connected as well. The shunt is obsolete in this case.
First!!!
I would turn off DVCC and just offset the charge voltage by 0.3v
Andy does not want to compromise.
Like# 79
So, basically, Victron + Seplos = No.
I wonder about Voltronic+Seplos.
+
The more components you add to the system, the more variables or problems you will have. You really only need a good BMS and good multimeter. Also, there is no such thing as too much power from solar. Expand your battery capacity and go truly off-grid. If you have to much solar power then you are wasting power. Add capacity and tell your utility company goodbye ✌️
Hi
I am not going through instructions on RUclips.
You need to talk to your Victron supplier regarding scheduling your equalisation.
Talk to your supplier
Don't depend on advice from experts on RUclips.
So...... What does Victron have to do with Seplos?????? Or vica versa? Do you know that Victron does not support Seplos Batteries? If you have no back ground on why this testing is being done then do not comment.... This is testing using completely different systems with one another and integrating them as well as possible...
Honestly, don't buy victron, electronic design excellent, understanding Lithiums, 0 out of 10.
It's been running perfect since the beginning.
I just installed a WZRELB 4000w 24v inverter to run aircon lol now cool as ice ,my lady wanted window mounted one in office , its kelvinator 3.9kw 1180w 1,5hp ,been testing it on solar making 1000w-1200w no worry's runs great very quiet ,so good free cool air all day and few hours at night , on 6kwh battery , ,ill be fitting a 3.5kw hybrid solar powered aircon in my shed , but i am surprised how well this window mount thirsty kelvinator runs on my little 24v system ,
more solar wire showed up today added more panels 4 x 20v 150w in a string at 80v voltage matching 300 -330w 2x 2 strings 80v panels voltage now 3 strings making 1400w at 72v maxing the 100/50 ,now putting in 50amps ,aircon draws 45amps off the battery's so now have 5amps 200w left over hehe ,i toasted some bread made plum jam toast on the big 4000w inverter lol with aircon on ,but most importantly i earthed the inverters and charge controller to the house copper earth rod , be safe guys ! have fun building but play it safe earth and fuse everything
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