[RE-wrenches] Tigo RSS Off Grid

[Ray Walters]

I second using the 48v to 12 v DC DC converter.  I've had success with 
that, and avoided the issues Jeremy mentioned.

Ray Walters
Remote Solar

On 2/17/2024 9:35 AM, Bradley Bassett via RE-wrenches 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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