Charge Controller don't do bulk charging

Hi,
Recently I installed a 5kw sola panel capacity with a Chinese SNADI MPPT charge controller (100A).
My battery bank is lithium 48V.

The system worked fine for few days then over suddenly it stopped charging.

I tried to disconnect and reconnect again, only to realize the solar charging controller remains at float charging stage and it doesn't go into bulk charging stage.

I have tried to reset settings to start afresh but results remain same. I also tried to change battery type without any success

I thought the problem was voltage settings. The float is set at 58.0V
Currently, the scc drains battery until it cuts off at 42V without charging.
I would like to get support
Thanks
Innocent (WhatsApp +255754711959)

We would need to see the panel specs and how you have them configured in Series / Parallel.
Then the SCC Info, link to manual.

Off the top of my head, the instant cause would be misconfigured panels and you over drove the SCC and burnt it out. They all have limits for volts/amps/volts incoming, go over the ratings and the Magic Smoke appears.

Steve_S said:

We would need to see the panel specs and how you have them configured in Series / Parallel.
Then the SCC Info, link to manual.

Off the top of my head, the instant cause would be misconfigured panels and you over drove the SCC and burnt it out. They all have limits for volts/amps/volts incoming, go over the ratings and the Magic Smoke appears.

Click to expand...

Thanks Steve,

My Batteries are 12V configured in series. The SCC manual specifies the 48V battery bank. The panels are configured to bring 118V while the SCC operates at a maximum of 150V.
Currently, as it can be seen in the pictures I attached the PV are bringing less than 130V.

The system was working at the beginning several days. It just stopped suddenly.Should it be that it burnt, would it remain alive as it is stuck with float charging ?

Most SCC's have different circuits but they really can be anything internally, My assumption is the lower cost Value Models and even some Tier-2 models use a single board and share many components. The higher end SCC's tend to be more modular in design for redundancy, they also have over volt protections and such because climate/temps can affect solar generation. I can see it when it's -20C or -30C and the next day it is 0C, there is a marked difference in power generated.

without more info, I can't offer much more help.

Several months back, I had a couple of questions for the MTTP company. In their side comments (after answering my questions) they told me there is a lot of copy-cat All-In-On controller/inverters like mine (2424VL-MSD) that look identical to theirs for a much cheaper price. When these copy-cat cheap controllers crap out, they get the blame for it and the controllers are not from them.

The moral of the story is don't fall for the cheaper controllers or you might get burned.