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there are all kind of thermal fuses with difrent ratings. Some reset, some are one time use. One time use is better for this application as you don't want charging to restart once a cell has gotten that hot. This works for me as all my charge sources (alternator, SCC, shore charger) are...

I have a thermal fuse taped on to each cell (4S , 12 volt) which will stop charging in the event a cell goes over 65C. It's independent of the BMS, so a charge cut-off of last resort. Not intended to protect the cells, intended to avoid a fire or off gassing.

Maybe try this 48 Volt Victron BatteryProtect? https://www.victronenergy.com/upload/documents/Datasheet-Battery-Protect-48-V-100-A-EN.pdf But i would put it on the inverter's on/off remote input (and not the DC load side) if your inverter is set up this way...

The DSSR20 are optional and are primarily intended to save $ on large solar charge controllers. I agree it's not the optimal solution but perhaps a frugal one? I have a small solar set up and run my electrodacus with a Victron MPPT. Works great in this application. BMS disables the MPPT via...

Old thread but I thought I would post here for anyone considering Frey cells. My Frey representative reached out recently and I took the opportunity to ask about the relative high IR of the Frey cells (both AC 1KH & on an a voltage drop basis). I provided a link to this forum thread, so they...

Hi Hwse, sorry i know this is an old thread. I also have an argofet to separate a AGM start battery and a LFP bank (and to allow for a 'dump load' should the LFP disconnect). I note you put your sense wire on the input side of the Argofet. I put mine on postive terminal of the LFP. Just...

Soakupthesun, im not the best person to explain this to you .. but putting cells in 3P, 4S is not a straight forward exercise and requires very well matched cells and very low resistance btw cells in parallel so that they stay together in SOC. In general it's recommended that cells in...

150 to 200 mili amps of passive balancing should be fine for a 300ah pack if you charge to full on a regular basis.... I have run 280ah, 4S 12v eve for years like this with no trouble. I did top balance initially.

yes, see OP

OP, you cannot wire your pack like that with only 1 BMS. you can't have a bms's balance wire connected to 3 cells that are not in parallel with each other. You either need 3 BMSs or you need to put 3 cells in paralle first, and then in serises with the other 3-cell packs. As wired you...

Mine arrived from the Hanzor store. Installed and commissioned & so far no issues. But I have not had to enough time really tell yet re overall performance. I believe these BMSs run internally on 24volts and there was an issues for a while (2022) with the built-in boost/buck converter for...

No experience with this brand but watched the video and was impressed (for the price). These look amazing for $180. Can't believe these 100 ah batteries have got that cheap. It's cheaper than building a DIY battery. I have a remote cabin with a crap lead acid battey and 30 watt panel...

https://panbo.com/victrons-new-orion-smart-dc-to-dc-converter-exciting-developments/

Better I. think you set charge current to any anywhere btw 50 and 1 amp. So that way you can dail-in the max output of your alternator during idle (without overheating). Why Victron did not add this feature years ago to the DC-DC line is a mystery...

I ordered a JK B2A8S20P yesterday from the Hankzor store. I let you know how it goes. Thanks for the tips and recommendations. MP

Also, note that the Electrodacus is max 8S (not 16S).

Yes that's all very true. Works well with the Victron SCC, DC-DC chargers and Inverters (via the directly connected harware control relays). Many of the Victron stand alone shore chargers do not have this feature. I set the Victron charge voltage to below the BMS's HVC, so the Victron's turn...

Electrodacus works well in some situations. It's more work and expense to install than a FET based BMS. It's a poor-man's REC. Good for 12 volt applications where you need high current rates that only a mechanical relay can provide. Has a screen so if that's a feature you want it's a...

I saw a number of posts about failed JK BMSs over the last year. Most of the problems seemed to be for units that were designed for 4S. The 8S-16S units seemed to be more reliable. Anyone know if JK has solved their reliability issues for the 4S units? Or is the recommendation still the...

You design looks fine but it's not clear to me if the coms will play nice out of the Epoch 300 with the Victron gear. DC -DC chargers are inefficient and don't provide a lot of power. So with this design you will be relient on your solar. Perhaps not a problem in sunny GA, but not an option...

I personally like the Electrodacus. But requires a lot of work some expense to implement.

You will need to watch out that there are not other inductive loads attached to the LFP bank (like an anchor windlass or electric winch) as they have very high start up current... I assume this is 3000VA multiplus. 300ah/12v bank is pretty small for an inverter of that size. Wire length...

My system is all 12 volts and the inverter is tiny (1200va Victron). I pull the occasional big loads, as i run my 1000w windlass off the lithium house bank (with the engin running, so supported by the alt.). Otherwise it's all fridge /. freezer and instrument loads. We only use about 100ah...

Not sure what the OPs meanth by this - but the Electrodacus bms is designed to be both a BMS and SCC. It requires the solar panel input voltage to be marginally higher than the battery voltage. The BMS controls solid state relays which turn on/off solar input ( it can also divert unused...

$350 is a great price. If that was an option for me, I would have gone that route for sure. M14 terminals is madness. But the C rate on these cells is very high so I assume the reason for the big contact area...

This makes sense to me, however for low C rate applications (solar storage), does it matter so much if a one cells has a 0.1C load and another paralleled cell 0.09? All the cells are way below their max continuous discharge rate. And presumably, as long as the battery pack is charged to a...

That's a lot of Winstons. Very nice. How many AH are the cells you choose? I did not think direct from manufacture would be cost effective for the 4 cells (400ah) I was seeking.... Winston terminals are 1st class. Terminal quality is my main complaint with my existing EVEs. The Frey...

What are you talking about. Sea Captians are the best ;) https://www.seacaptaindate.com/

Winston are the 'gold standard' but are very hard to source and are pricey.

2 of these? https://www.victronenergy.com/batteries/battery-balancer

Likely cell #16 just has slightly less capacity. 100mv deviation down at 2.6v , 2.7v is not a lot capacity difference. You are always going to be limited by your lowest capacity cell. Seems OK to me.

That could very well be the case. I don't know enough to comment. The start-up surge current i was describing i know occurs with series wound motors...

Great test. Thank you for posting your results. I can't comment on hight load behaviour of cells. No experience with that. The voltage drop seems to be about 0.6v per cell for a 2C load. That seems OK to me. Other observations: Your heating and cooling solution seems to work very well...

AGMs are more fussy to charge then lead acid and more prone to sulfation if not fully charged on a regular basis. They are better in many ways (charge acceptance / deep discharge) but harder to keep happy. You really should have a minimum of 10% of the combined amp hour capacity of your AGM...