Turning off the Sunny Island battery charger, using an external charger?

[checkthisout]

I have one of these https://www.ebay.co.uk/itm/392485191184

So you have an SMA inverter charger and one of the transfer switches shown above?

[Fingers]

Your charger won't charge lipo4 properly simply because it's voltage settings are too low. It will still charge, just not fully.

I'm going to have to look in to that. Not fully is better for the life of lifepo4, apparently.

What battery setting would you choose? Lithium?

[Fingers]

So you have an SMA inverter charger and one of the transfer switches shown above?

Yes I bought it for a Chinese inverter that I was going to use, but couldn't due to the damp environment. Which is why I went for the SMA as it's sealed.

[Ampster]

........

What battery setting would you choose? Lithium?

I only charge my LFP pack to a voltage that corresponds to 3.45V per cell. Generic settings are too vague for me. The terms manufacturers use are also too ambiguous. Current and voltage suit my scientific way of thinking better.
Even the term Lithium could mean NMC at 3.7 or LFP at 3.2 nominal voltage.

[Fingers]

I'm guessing you would do that at the bms? What voltage ect would you use from your controller?

[checkthisout]

I'm guessing you would do that at the bms? What voltage ect would you use from your controller?

I got a notification so Ill respond but you have yet to show us what model or type of anything you have other than the transfer switch. It becomes an exercise in frustration to help when you're not providing the proper info. You don't go into the auto parts store and say you need an air filter for a car, you tell them the year, make and model and any features the vehicle is equipped with.

There are probably 1000 different brands and models of charge controllers etc and of course 10's of thousands of combinations of batteries in every chemistry and their respective settings and such.

Nobody can help you until they know what they are helping you with.

[Fingers]

It's a general question. I do not have the batteries or charge controller for this system yet. If I had my system up and running I wouldn't need to ask.
I'm new to this stuff. I have had the same answer three times from folks, "I'd use this volt for each cell", but what do they use to get the correct voltage, the bms? No ones saying. And getting the power from the controller (any controller) as controllers do not state lifepo4 we must assume we have to choose for our own voltage. But I don't know what that is as no ones saying.

[checkthisout]

It's a general question. I do not have the batteries or charge controller for this system yet. If I had my system up and running I wouldn't need to ask.
I'm new to this stuff. I have had the same answer three times from folks, "I'd use this volt for each cell", but what do they use to get the correct voltage, the bms? No ones saying. And getting the power from the controller (any controller) as controllers do not state lifepo4 we must assume we have to choose for our own voltage. But I don't know what that is as no ones saying.

Sounds good.

[Ampster]

I'm guessing you would do that at the bms? What voltage ect would you use from your controller?

No, I only use the BMS as a last resort fail safe. All the voltage and current settings that control charging are in my inverter. It is an All In One so I am referring to the charge controller section of the inverter

[Mike90250]

The battery BMS is intended to be a last ditch safeguard against damaging the battery from over or under charge. All regular settings should be set in the charger device.

following is a conservative example for larger LFP prismatic cells configured to a 48v nominal bank

Charge setpoints Discharge setpoints.jpg

[Fingers]

Ah ha, got it. Thank you for the info.
I bet your chargers are pretty special bits of kit, and I suppose my Epever Tracer 5415an 50amp that I have just bought is a pile of dung ?
I have bought so much kit and got it wrong, look out ebay.