[RE-wrenches] Disable refloat

[Steve Higgins]

You could manually set it to RE-Bulk...   But you are looking for something
automatic...

To do that, you'd need to use refloat and set the float voltage as high as
it goes. It won't be the full bulk voltage, but it might get you there.



Another way is to use the genalert function... But it can take time to get
it right.

Genalert On V   24V
Genalert delay  5-10 min
Genalert Off V Target Absorb Voltage
Genalert Off Delay Should be Absorb Timer...

It'll connect to the input VAC, charge the battery bank, and then, after
the gen alert-off delay is met, it'll disconnect and go back to using the
battery.





*Steve Higgins* *⋅* *Technical Services Manager*
*t* +1.902.597.4020   *m* +1.206.790.5840
*f* +1.902.597.8447   *e* steve at surrette.com
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On Fri, Dec 12, 2025 at 8:15 AM Starlight via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Hello Drake,
> Absorption is the phase where voltage remains constant. Until the Absorb
> voltage value is achieved, you will be bulk charging. You can only force
> Float or Bulk.
>
> Larry Crutcher
> Starlight Power Systems
>
>
>
>
>
>
> On Dec 12, 2025, at 8:58 AM, Drake Chamberlin via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
> Hi Jay,
>
> The system feeds the grid through an SMA H-FUS inverter. The Outbacks are
> off grid inverters, but are AC coupled to the batteries to provide power
> when the grid is down.
>
> The inverters monitor the batteries and go into REFLOAT when the batteries
> hit 25 volts. I would like the inverters to go strait into the ABSORB cycle
> instead of going to REFLOAT.
>
> The grid tie came after the the Outbacks were already in as a backup
> system.
>
> Thank you,
>
> Drake
>
>
> *Drake Chamberlin*
>
> *Athens Electric LLC*
>
> *Ohio Electrical Contractor’s License 44810*
>
> *NABCEP Certified PV Installation Professional*
>
>
> ---
>
>
>
> On 2025-12-11 10:54, Jay via RE-wrenches wrote:
>
> Hi drake.
>
> You’re talking about the inverters charging the battereis, meaning
> this is a grid connected system?
>
> Do you have a mate3/s or 1?
>
> Jay
>
> On Dec 11, 2025, at 7:39 AM, Drake Chamberlin via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
>
> Hello Wrenches,
>
> We have a rental property with two, stacked VFX 3524 inverters. In the
> winter the batteries don't get an adequate solar charge. I would like to
> have the batteries get a bulk charge when the voltage drops to 24 volts,
> but it keeps hitting refloat.
>
> How do I disable refloat? Can I just set the refloat time to zero?
>
> Thank you,
>
> Drake
>
> --
>
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