[RE-wrenches] Converting an outback radiant 4048 to an 8048

[William Miller]

Friends:

I have done this once to a two Radian system. Lones told me this is
straightforward but not supported. I bolted in the modules and updated the
firmware. Set module control to Both. It’s been a while so I hope I am not
forgetting any steps.

William Miller
Miller Solar.com
805-438-5600
www.millersolar.com


On Mon, Nov 3, 2025 at 6:51 PM Jay via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> I don’t remember hearing you can’t upgrade. You could ask zonna what the
> board part numbers are between the 4 and the 8.
> I know you can turn an 8 into a 4.
>
> But the power modules would need to be same rev.
>
> And if it’s a 4048 not an A, I think it’s about impossible to find
> anything to work on the non A variants
>
> Good luck
>
> Jay
>
>
>
>
> On Nov 3, 2025, at 7:39 PM, Kirk Herander via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
> 
> Dana,
> Interesting. The procedure as I recall to input the installer menu code is
> in the last quick start guide they published, along with the generic
> password itself. it's needed to turn on AC coupling, maybe also for your
> upgrade.
>
> And I was told 3 years ago by OB that you can't just add a 4kw inverter
> module to ramp up a 4k to an 8k. As a result I upgraded my customer from a
> 4048 to an 8048. I still have the 4048 you can pull the module out of. I'll
> sell the whole inverter cheap.
>
> On Mon, Nov 3, 2025 at 2:25 PM Dana Orzel via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
>> There is a procedure along with a tech code which I have, to get into the
>> installer menu in a radian. Does anybody know the steps to get into the
>> installer menu?
>> Thank you in advance as always
>> Dana Orzel
>> C: 208.721.7003
>> E- dana at solarwork.com
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>
> --
>
>
> *Kirk Herander / **kirkh at vermont.solar <kirkh at vermont.solar>*
>
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