[RE-wrenches] Sunnyboy TL with Batteries

[Benn Kilburn]

Hi Ray,
Keep in mind that the secure power supply (SPS) is limited to 1500W output, in full sun. 
Recently I was testing a SPS system on a fairly overcast day and was able to power a simple radio but not able to turn on a 500W work lamp. 
Also, the AC breaker supplying the inverter with the SPS has to be manually switched off (as per the manual) and then the switch for the SPS turned on for it to operate and then flip both switches again when grid power is back on before the inverter will operate in grid-connected mode again. 

Benn Kilburn
SkyFire Energy Inc. 
780-906-7807


> On Nov 11, 2015, at 3:22 PM, Ray Walters <ray at solarray.com> wrote:
> 
> Hi All;
> 
> It just occurred to me that the new secure power supply model Sunny Boy TL inverters might be able to charge a battery based inverter through its regular AC input, and avoid some of the control issues inherent to regular AC coupled systems.  This would allow the secure power output to be wired to the regular AC input of the battery inverter, and then gain the advantages of full battery charge control.  This would require using a battery based inverter with 2 AC inputs, with regular grid to the grid input, and the secure power supply output from the Sunnyboy wired to the generator (or 2nd) AC input.  (or some relay arrangement for single AC in inverters)
> 
> Anyone try this, or have good reasons this is a bad idea?  I'm literally thinking out loud, so don't hold it against me if this actually is dumb.
> 
> Thanks,
> 
> -- 
> R.Ray Walters
> CTO, Solarray, Inc
> Nabcep Certified PV Installer,
> Licensed Master Electrician
> Solar Design Engineer
> 303 505-8760
> 
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