[RE-wrenches] Tigo RSS Off Grid

[Bradley Bassett]

For what it's worth, here's a spreadsheet I used for specifying RSD for
various systems. Some of this is out of date but might be useful still.
I've attached some drawings for many of these systems as well.

On Sat, Feb 17, 2024 at 8:35 AM Bradley Bassett <bbassett2 at gmail.com> wrote:

> I powered a MidNite LSOB transmitter from a Classic AUX, though the
> receivers didn't work with the Classic. The Classic is limited to 200ma
> output and the Tigo and APS transmitters are rated at up to 800ma input, so
> it might overload the Classic AUX output if they really do draw that much.
>
> I tested an APS RSD system recently with a Classic and it did not work
> well. I believe that the Tigo transmitter is very similar since the APS
> devices say "licensed by Tigo" on them, So, the Tigo RSD devices may not
> work well with a Classic either.
>
> What I recommended while at AEE was to use a 48VDC to 12VDC converter to
> power the Tigo and APS transmitters. This works well. Here's the one I
> recommended if it's still available:  mean-well/ddr30l12
> <https://www.onlinecomponents.com/mean-well/ddr30l12-50161036.html>    I
> never had any negative feedback using this with a Sol-Ark and APS devices.
>
> With a Classic in the system I've had to use the FireRaptor RSD devices.
> If you can get approval or have older modules, you might be able to follow
> the FireRaptor instructions and use 2 modules in series for each
> FireRaptor. You do still have to have a way to disconnect the PV output
> circuit from the Classic in order to make that circuit dead from the
> Classic end of the circuit. I did that by putting an MNPV6-disco on the
> power shed which disconnects the PV output circuit as well as the 24VDC to
> the FireRaptors. And, I am powering my FireRaptors at 15VDC and it works
> fine.
>
> Brad Bassett, ret.
>
>
>
>
> On Fri, Feb 16, 2024 at 6:47 PM Jeremy Rodriguez via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
>> Has anyone successfully used a MidNite Classic CC to power a Tigo Rapid
>> Shutdown Transmitter in an off grid setting ?  Specifically using the 12v
>> Aux output to keep the PV circuits alive instead of relying on the inverter
>> AC output to do this.
>>
>> Think of this scenario.  Batteries reach LBCO, inverter shuts OFF, no PV
>> to re charge back to LBCI, no generator backup to recharge batteries.
>>
>>
>> Jeremy Rodriguez
>> Solar Installation / Design
>> All Solar, Inc.
>> 1453 M St.
>> Penrose Colorado 81240
>>
>> Sent by Jeremy's iPhone. Sorry for typos and shorthand.
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