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Does anyone know what the differences are between high quality fuses (like ANL or MEGA fuses from Blue Sea Systems) that sell for over 40 CA$ a pop, and low cost ANL fuses (from Amazon, 17 CA$ for 6)? I tend not to save money on this end, and I totally get why cheap circuit breakers are a no-go...

If you are used to 3D printing functional parts (use higher temps and less cooling for better strengths), a 3D printed bus-bar carrier should work out from the mechanical side, though I would avoid PLA. PETG or ABS would be my choice, though filament is flammable, and could ignite at high temps...

Update: I contacted SOK, got an answer right away: The batteries were in storage mode. Beginning to charge them wakes them up. (TIL) Both batteries communicate now, the real SOC is above 40 %. Thanks for the support!

I ordered 2 SOK 12 V 100 Ah heated from SOKs Canadian site. I noticed that neither one of the two BMSes showed up in their app, although they are supposed to have Bluetooth. I then measured the voltage, and in both cases it is at 10.9ish volts. This means that the battery is below 10 % SOC, and...

@akumd The cabin is not accessible during winter, I'll see what's up when the season starts. There was more than average off-gassing, so I expect to find batteries that lost a lot of liquid. I'll tune down the voltages next time I go.

Thanks, very interesting points! The configuration of the BMS says the "charging undertemp trigger delay" is 5 seconds, which checks out. What does not check out is the return condition 5°C, it clearly returns right away, maybe because of what you said about the MOSFETs. I tried a more capable...

I am running test with a self-heating battery, and I noticed a certain behaviour when charging at low temperatures, and I am wondering if that could cause a problem down the road. The battery is at -11°C (below freezing), and when I apply a 1 A charge current, the following happens in the...

Hi Tom, thanks for you answer! I did change to user mode, and the voltages while charging are still way higher than what I set up. I might just get another SCC to see if that solves the problem.

In a friends cabin, we replaced a 20 A (Epever) charge controller with a 40 A SRNE SCC (SR-ML2440), and doubling the installed PV to 520 Wp. The batteries are (old) 6 V, 235 Ah FLA in 2S3P configuration. The new SCC is configured for FLA, but the voltages frequently reach and even go beyond 15...

An option in Canada that has not been mentioned here: https://solarpowerstore.ca/ Looks interesting, but I don't have any experiance with them.

I am putting together a kit for a really cold climate (northern Quebec, down to -40 C and below). I am planning to build a box of 4 inches of foam board, and use heated SOK 100 Ah batteries, 2 in series for 24V. The manual of these batteries states that they can only be put in parallel, which...