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I am also thinking to use the SBMS0 to control a heating pad on the Battery bank, but I guess I run out of EXTIO :(

one last thing how does the SBMS0 get powered? I saw some drawing with battery + to 1K ohm resistor to the EXTIOn, is that it?

I really like the idea of using the SOC to control the automatic system the problem is that if i want hot water and the battery is not full it will not heat the water so i think i will put in parallel to the automatic switch a toggle switch so i can heat water also if battery not full.. Anf you...

thanks a lot, a really good point for using the inverter for heating water, easier to work with a 120V heating element. Did you have some kind of automatic system to activate the heating of the water with the inverter when you have overproduction on solar? I guess you can use the signal of the...

Thanks for the input, using a different style of BMS is exactly what I am thinking now. I do not feel to confident about the user interface and control of parameters of the BSM i saw (except overkill ) So i am planning to totally change the design and use electrocacus , I can also integrate the...

I had a similar problem, and after chasing a 250+BMS at the end I decide to go with electrodacus , I will let it do all the BMS and solar handling, plus I will have a more complete monitoring system, temperature sensor, diversion of extra solar production, will be way cheaper and reliable with...

correct, that why I said "that solution is not good for you" because you can not do it :D , my point from the beginning was using overkill BMS is out of the question if you need 200A and 24V . Sure you can go with 2 overkill in parallel and have 200A at 12V but i think was not the first post was...

i was thinking you want to go 24 V , so you have to go in series with the 2 sets and that solution is not good for you

I still don't know if the only solution for 300+ amps is a small BMS that drive a contactor/relay, I was hoping to find a relay that has an initial load to be activated and then some mechanical advantage (spring or something) that keep the contact close but not a stupid magnet field that has to...

if you put the 2 sets of 12V 120 amp BMS in series to get 24V with this solution you are limited to 120 A ?

Yes what will say is that if you have a group of series of panels in parallel is suggested that each series of panels have a fuse, otherwise, if you have trouble with one series you can affect the one in parallel. If you have your panel just in series no need for a fuse. BUT I have my panels...

The purpose of the CCGX is only to see the status of the system or it does any work on the optimization of the charge etc ? does anyone has played with raspberry pi to achieve the same functionality?

maybe you want some disconnectors at the battery main, some between solar panels and MPPT . What kind (if any) monitoring device you plan to use?

those victron 3000 are 2400 W I use for limited time power tools so that what I need to stay away from the 2000, I have small gen that can also give a hand to bump up power when for short time I need more juice... the van is a "cube" van style a unicel fibreglass, just perfect fit :D i have...

yes a disconnector on the solar panels is a good idea because of the voltage i guess you need a different style than the 12/24V v .. need to check specs. I also want to put all the ground connections to the chassis in the drawing that are pretty important. In the drawing with the BMS not...

Thank you for your input, I have to instruct myself more on BMS I was thinking sizing the BMS is not related to the size of your battery banks but the current you are taking out or putting in (A). So in my mind if the BMS is handling only the 24 to 12V load and the solar panels it had to handle...

Everyone is pushing me to go all the way victron :D FINE! I though to return my actual MPPT and go Victron, so i when on they website to see what unit they suggest I enter al the info 3 panel in series, Pmax 340W, Vmp 37.6V, Imp 0.05A, Voc 45.9V, Isc 9.62A and they say you need : SmartSolar...

Thank you for all the advice ! I can not put the BMS before the shunt because I have not all the current going true the BMS The BMS I put is a 100A and can only handle solar charger and the 12 and 24V load for sure not my 3kv inverter I thought you always put a shunt last thing before your...

Ok , here my revied version , try to keep it simple but i am not sure I am doing the right thing, the reason behind this design is: - I want to minimize ghost loads of a 300A big BMS - I am using brand new cells (hope they do not go out of balance quick) - I will mainly charge with solar so my...

I guess you can use a relay and operate the "switch" with some logic. For example, maybe you want to shut down everything after a certain hours and you can easily do it putting a timer on the switch.

Hi, Just an idea ... i was thinking on gost loads on BMS, especially when your BMS use a mechanic relay switch on a decent size array on a mobile application. In my case 1000w solar array. Will was talking about the fact that if you have a new balanced lifepo4 pack it takes a bit of cycle to go...

any vectorial drawing program can do it, I am using adobe illustrator, but is like killing a fly with a cannon... freehand, CorelDraw etc can do it. is just what you get used to using... there are a bunch of free programs you can use too.

Instead of the BMV-712 can you use the Victron SmartShunt 500A? it has a temperature sensor and Bluetooth , not sure if he can talk with the multiplus ...

maybe i just ship back my shunt and get the victron 712 :)

what size of the inverter/charger are you using? the price on the Heltec is suspiciously low .... can you change any setting on that unit? what model, in particular, you are using? You sad that the 250A Heltec 8S BMS has freezing charge protection so not real need to BMV protecting for...

Thank you for the information, that sound great, maybe I have to look around for a 24V 8s BMS with that specs (open to suggestions) Otherwise what about using a temperature relay control like this Inkbird Temperature Controller ITC-1000F 12V Digital Thermostat Heating Cooling Dual Relays Sensor...

I totally agree, just try to save some money, and some of the functionality are nice but not totally necessary. Dumping energy production from solar to a heating pad when temperature does not allow for battery charging is a great idea, I guess you have a switch to prevent excess production heat...

more readable attach... ( i put a pdf... when you attach a jpeg the system looks like resize the image? )

you are right, need to come up with something else ..... maybe i can use some of the relay function of the multiplus to do something... any suggestions ?

where did you find those? I have a similar project, just need to slide one panel... For the drawer slider I am also concern about freezing temperature, dust and dirt, I like the one above more.....

Hello and thanks in advance for your advance. Building a overlader on a unicel cube van on Chev 1 ton The objective is to be able to run some power tools for this reason the choice of that size of charger inverter. Also, no propane on board and cooking is using an induction cooktop, gasoline...

Having a 4000w inverter also just in standby will use more power