[RE-wrenches] Outback Power FLAs to LFPs

Wed Dec 17 14:17:46 PST 2025

Roy is correct, We have a number of clients with "old school" inverters who have changed to LIPO batteries and they work just fine in open loop set ups. Many of the early Lithium battery BMS systems closed loop communication didn't work well or at all any way.
Pieter Huebner
Project Manager
Off Grid Enterprises
________________________________
From: RE-wrenches <re-wrenches-bounces at lists.re-wrenches.org> on behalf of Roy Butler via RE-wrenches <re-wrenches at lists.re-wrenches.org>
Sent: Wednesday, December 17, 2025 2:13 PM
To: re-wrenches at lists.re-wrenches.org <re-wrenches at lists.re-wrenches.org>
Cc: Roy Butler <roy at four-winds-energy.com>
Subject: Re: [RE-wrenches] Outback Power FLAs to LFPs

I'm also running the EG4 server rack 24V 200 Ahr batteries with my old Outback VFX 3524, Classic 250 and
Morningstar Genstar 100, all open loop with no problem. It's all a matter of getting the charge settings right and
checking on the cell balance periodically.

I'll be playing around with programming the Genstar for closed loop soon, should be fine but then, what to do
with the Classic.....we'll see how it goes.

Roy Butler
Four Winds Renewable Energy, LLC
8902 Route 46, Arkport, NY 14807
607-324-9747

Education is when you read the fine print; experience is what you get when you don’t.

“The less people know, the more stubbornly they know it.”

He who asks a question is a fool for a minute. He who does not ask is a fool for life

Although no trees were killed in the sending of this message,
a large number of electrons were terribly inconvenienced.

On 12/17/2025 2:51 PM, Mac Lewis via RE-wrenches wrote:
I have used EG4 24V 200Ahr server rack batteries with the same equipment and it works fine.  It will do closed loop with Victron if that happens in the future.

Good Luck!

On Wed, Dec 17, 2025 at 11:46 AM Jay via RE-wrenches <re-wrenches at lists.re-wrenches.org<mailto:re-wrenches at lists.re-wrenches.org>> wrote:
Hi Chris

I have dozens of people with open loop lithium and older Outback equipment  All work flawlessly

There still is some incorrect information about the LBCO not working with LFP. That I believe dates from some older LFP designs.

All the newer 16 series prismatic LFP work fine with LBCO/outback.
As well as all the charge parameters.

Jay

On Dec 17, 2025, at 9:54 AM, Chris Daum via RE-wrenches <re-wrenches at lists.re-wrenches.org<mailto:re-wrenches at lists.re-wrenches.org>> wrote:

Dear people:

We have a customer in Henryetta, Oklahoma, and he’s been buying various equipment from us over the years.  He’s elderly, a veteran, and a believer in solar power.  But he’s been having battery problems (he’s got twelve 6V L16 types at present) and is interested in moving up to LFPs.  He’s got an Outback VFX3524, FM60, MATE3S, Hub4 and the usual accoutrements.  If he wants to go with LFPs, what are your suggestions – and also how might it integrate with his 3-year old inverter?  I suspect he will be unwilling to spend a chunk of change on a new inverter.  All advice is welcome!

Best,

Chris Daum

Oasis Montana Inc.

406-777-4309

406-777-4309 fax

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Mac Lewis

"Yo solo sé que no sé nada." -Sócrates

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