Changing from AGM to Lithium Phosphate batteries - Schneider 6048 and 80-600

I have a Schneider 6048 inverter and 80-600 charge controller. The battery bank is eight 8D AGM 280 Fullriver batteries that are 6 years old and starting to fail. I want to change the batteries to eight dumb (as in not smart) Ecoworthy 8D 280 Lithium Phosphate batteries. I am an avid DIYer and have an electrician who can help. I know I have to reset the inverter and charge controller settings to match the batteries. Is this as straightforward as it appears to be? One for one battery swap and change settings?

What's the voltage of the bank? Are you connecting batteries in series to increase the voltage? If so I think it's recommended to add a battery equaliser to dumb Lifepo4 but other smarter minds can comment.

ThaiTaffy said:

What's the voltage of the bank? Are you connecting batteries in series to increase the voltage? If so I think it's recommended to add a battery equaliser to dumb Lifepo4 but other smarter minds can comment.

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The current bank is wired in series to achieve 48V. The inverter has an equalizer. I do not use it for the AGMs but could enable it for the Lofepo4 batteries.

dmeany1 said:

The current bank is wired in series to achieve 48V. The inverter has an equalizer. I do not use it for the AGMs but could enable it for the Lofepo4 batteries.

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I don't think a lead acid equalisation charge and a lithium battery equaliser are the same thing also do you need that many batteries bearing in mind the 280ah agm's only really output 140ah where as the lithium batteries will technically output the full 280ah if it were me I just buy 4 of the eco worthy 48 v batteries giving you 200ah and save the hassle and money

I would love more battery capacity so will probably go for 1:1 replacement. Thanks for the battery equalizer tip. I will research and see what I can find.

dmeany1 said:

I would love more battery capacity so will probably go for 1:1 replacement. Thanks for the battery equalizer tip. I will research and see what I can find.

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Might be called a battery equaliser balancer or just a battery balancer the Asians have crazy names for lots of the hardware so I might not be correct with terms used in the US

Thank you!

dmeany1,
You could consider using 48v batteries if going lithium. Since stringing batteries into series in the lithium world is less ideal.

SunDave said:

dmeany1,
You could consider using 48v batteries if going lithium. Since stringing batteries into series in the lithium world is less ideal.

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I assume you mean a single 48V battery? So I can learn, what is the concern on running smaller 12 V in series?

I am using 48v batteries, but from what I understand, you can choose between 4 12 volt batteries and trying to keep them in balance, or get any number of 48v batteries in parallel instead and not worry so much about balance issues. If you do go the 12v route, be sure to check manufacturer specs as to how many you can series. Some allow it to a certain voltage, some manufacturers do not allow series installs, even with their 12v line of batteries.

If you are replacing batteries, it would be worth your time to research it, and gather some opinions (like you are doing). I am just one opinion, but I believe you could avoid some future issues by not making strings of lithium batteries.

Thanks, I am researching all options.