Recent content by zedconnor

As far as I know MUST makes their own inverters. But Chinese got alot of oem factories so they may as well be outsourcing too. Nobody knows. The FETS are replaced by a local repair shop. The aircon and everything else on the load side is fine. I put a new BMS and repacked the cell. The...

This is exactly what I am trying to figure out. I do not wish to have another similar incident. But the Inverter must've been the main culprit. (16 FETS blown and got replaced.) The resetting of tripped breaker by the user must be the next step in overheating the BMS. The BMS still works after I...

What about JK BMS. I am liking the latest model PB2A16S (the one on youtube reviewed by Andy) What would you prefer between JK and JBD?

Yes I have put a layer of double-sided tape (about 3mm thickness) as well as a PP-board between the bms and the cells. (The PP Board was able to withstand the heat) I have attached the re-packed pictures. This time I screwed down the bms above the cells. There will be no more foams. They only...

Can you suggest me which brand to use? Yes bro. Maybe a few tiny holes. Aside from that there is no vents. Chinese-branded packs also do not have any vents. They even advertise them with IP ratings.

I checked all the cells before re-assembly. There was no sign of damage. Even the blue plastic films are intact. No swallowing or buldging. Cell voltages of all 16 cells are within 50mV delta. And one important thing I forgot to mention is all of the cell voltages are around 3.35V only when I...

There was an unusual rain yesterday with a few thunder, and this house has no grounding system. Could it be a cause?

This is the inverter. Exact model is MUST PV18 5548 VHM

https://onccy.com/product/edb1-125-dc-mini-circuit-breaker-mcb-2p-63a-125a/ This is the link of the breaker that malfunctioned. I thought it is a decent quality breaker.

EDIT : All the 16 FETS in the Inverter got blown. And replaced. The setup seems to be running fine with a new BMS at the moment. So this happened today. Inverter is MUST 5.5kW Battery LFP 51.2V 100Ah (DIY) BMS Daly Smart BMS 150A ONCCY DC Breaker 2Pole 125A(non-polarized) The breaker...

I am a local diy battery reseller and looking to buy many JKBMSes from Alibaba. There are alot of them companies selling JK Bmses and it has been difficult finding the real manufacturer. What is your experience with this? Is buying directly from the manufacturer better or are broker companies a...

Thanks for the explanation, so it is still ok to use this Polarized breaker in between Battery and Inverter. (But wired correctly so Battery is the SOURCE and Inv is the LOAD) In the case of someone accidentally or unknowingly opening the Breaker during Charging, the breaker may not burn due to...

This is where it is written. https://diysolarforum.com/resources/dc-breaker-polarity-wiring.68/

But I have read that if wired incorrectly(probably meaning inverter as the Source and Battery as the Load connection) , the breaker can catch on fire if it is opened under load from battery. If I wire it so battery is SOURCE and Inverter is LOAD, will there still be a chance for fire if breaker...

I tried to ask chat gpt. How reliable do you think this answer is?