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I will once I'm back to US, I'm in Spain now at my property. I have received 3 of them and one of them will be completely open and inspected with plenty of pictures and my personal opinion on this matter, is it worth the money. When I have received first one there was very limited information...

Finally showed at my place will update with more details and pictures... 2 more coming on Monday.

You will be amazed if you work on other brands that are not Chinese and catch fire.

You are correct....i was looking at my data logs at various different Ah cells....only differences is dropping from flat curve little different on less than 100 Ah cells. I have downloaded your chart and printed out it will be seating on my wall in the shop. Appreciate all the time to invest in...

@rickst29 what Ah ratings are for this charts?

Following

Following I have ordered LPBF 15kwh pack. If you have time it would be nice if you do discharge tests with some good shunt. Looking like 2 rows per 16S 2P setup. And did you receive laptop software for BMS insight.

@rickst29 I agree with you. But there is so much we can get with generic BMS that at times of design was probably never intended for high Ah cells. Dedicated shunt especially in multi parallel setup should be more accurate. I usually look at lifepo4 voltage curve....if going down from flat...

It is nice to have about 0.5 meters space between 2 or 3 rows of panels for maintenance and cleaning. Especially when laying down and working on wiring or connectors issues. Also good space for blowing leafs if they accumulated between roof and solar panels. Space between roof and panels should...

I will be more than happy if you can provide shunt that has ability to measure 200+ A and it is capable to measure very small current draw. You have probably misunderstood my post. I was not referring to the JK bms issue but your overall expectations that you should expect from JK BMS . And...

This small current draw will not be picked up by shunt. And by looking at voltage that is rough estimate. Your SOC is guessing. Try to find better shunt that will keep memory of SOC even if not used for many weeks. But extend periods of not charging or discharging will not substitute lifepo4...

And m And mystery meter is? I didn't read entire thread...so is there something else besides Fluke.

I don't get it J1772 is L2 standard for low speed chargers commercially available....are you hitting fast DC charging stations instead of AC J1772 standard?

If you can adjust tail current to 0.05 C it will not matter what your absorption tome is set for once it hits tail current it will go to float. Tail current depends on manufacturers and types of chemistry ( what are cells you have originally designed for) But 0.05 C is usually good set point...

If you want less bus bars ( less resistance more efficiency) i would go with two parallel 16S battery banks. It will require one more BMS . This what i have learned working with EV battery packs. And slowly moving away from P and S in one battery setup. If you are going to scratch my advice...

Thermoelectric and liquid cooled plate under the cells with good insulation around is the best solution....no need for top cover ( unless needed for esthetic reasons) . It may be complicated but small liquid pump, Thermoelectric unit ,cooling plate and hoses is all you need. There are...

0.165 V is not bad......if you shooting for 3.4 V for cells max V that will bring you in worst case scenario up to 3.565 . Definitely interested in more details. More tight ( accurate) deltaV trigger will be better choice.

SEER will dramatically reduce when going over 9K units. And another advantage with multi split units where you have one unit outside and multiple panels inside. Is efficiency where you only using unit depending on your time of the day and places in the house you need at the time. I'm originally...

Post #48 picture is old design pack.

Newest model uses EVE cells. At least with information on hand i have from them. I have tow packs on the order and it will be stripped down for all to see if this is worth the money for other people to consider. If not passed my satisfaction i will write it off on my business expenses and reuse...

Not getting what you trying to say?

You will probably have to take it out test alone for Ah ratings....If all goes well top balance all cells individually and do some detective work why this row is not charging with rest of them or discharging faster than rest of them.

By looking KWh delivered from the outlet is going to always be more with L1 than L2 charging. So if you using this as reference how far your EV can go then that is misleading.

How you tried to check for gaps using flat non conductive bar across all cell terminals. This is very important for long life battery pack. If you use flexible cooper bus bars please scratch my post. And if you don't mind can you post pictures of your 3P16S I'm interested on terminal bus bars...

Remove all bus bars and use flat no conductive bar seating on top of all cells terminals. Use gap Guage and see if you have any gaps. If you are not using flexible bus bars this is step #1. Report back what you have observed.

How you compare with calibrated volt meter your deltaV? Definitely good build and cells

How do you come to this conclusion. When using L1 EVSE it is less than 85% efficient When using L2 EVSE it is 93-95% efficient depending on the EV inverter and where in the world you are using it.

Welded bus bars are cheap alternative to overcome this issue and many good quality Chinese makers are switching to this. This is not right solution but band aid ( by eliminating screws and nuts making more profits). Up to certain degree it is better than rigid bus bars with screws. I will call...

Acceptable DeltaV will depend on how accurate your bms is in reading voltage. When you know this that will give margin of error +/- (example BMS is accurate down to 6 mV) . How fast you charging and discharging scenario will change how DeltaV across cells. Grade A +++ will stay between 2-8 mV...

Only downside with any battery banks in parallel that run individual BMS for each pack in parallel is if one of them trip or goes to protection mode .You will have to make sure that voltage between one that tripped and rest of the pack in parallel are the same. Bring all packs to the same...

In theory. But in reality here is what will happen pack that has higher Ah ratings will naturally provide more current in parallel than pack with 50 Ah. As SOC continues to drop two packs will start drifting in the Voltage vs SOC ( we know that this chemistry has quite flat curve).And one that...

I will not advise you to do it unless you are very familiar with this. You can balance each cells individually even if they are welded in Series. Use benchtop power supply and apply leads across single cell set your power supply to 3.65 and whatever your power supply can deliver for current...

If run as parallel battery banks you will be locked on Ah of pack that has less Ah. If you running in Series you will have set bms to stay on flat curve especially on low V of lifepo4 chemistry otherwise you will face problems with balancing overtime. But 3 Ah difference is not the problem if...

I'm waiting on delivery for Felicity solar 48V 15kw battery all in one unit on the wheels. Once i tear it down and inspect i will post my findings. Cost with shipping one unit 2450 ,2 or more is will get you discount. Waiting time is ridiculous because i have ordered straight from manufacturer...

Without experient it will be hard to stay...if you have stubborn cells eventually it will destroy good cell also because of non stop balancing. If you have deltaV high like 0.2 V or more you will need balancer 2A minimum and be very careful when charging. If charging current is higher than what...