Voltage drop musings [RE-wrenches]

[blair Tump may]

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>Joel, we use the solar boost and we DEFINTLY have a increase output to the 
>grid. We  are using a SW4024D in our demo trailer and when not on the road 
>it peforms very well conected to the grid, as the other folks said much 
>better at low temps like we have here in Maine. The array is 16 Bp585 in 
>24vt w/ the SB panel voltage is tipically @37dcvts with the temps at  40* 
>and lower, current gets better. The best we have seen is at 0* and below, 
>snow on the ground we get a good 4-5 amp increase and in maine in the 
>winter its worth the extra $$$$$$$.  We float the batteries @ 25.5 and 
>today slightly overcast PV voltage is 29.5 / 33amps Temp @ 75*. We are 
>having Ethen Brand(Brand Electronics) put together a custom meter for the 
>trailer to show DC watts from PV, Also AC watts  to grid,among other 
>things, if any one else has any interest  in something like this, let me 
>know as we have been lobying Ethen and his wife to make a meter showing DC 
>watts for a while. I have figured that the SW series is about 78% efficent
>  I am presently trying to install a GC1000 grid tie in the trailer as 
> well but am having problems not being able to use a solar boost 3048 
> current in the 24 vt BB will be too much so trying to figure a way of 
> having a way to swap panel voltages....... any help guys ang gals would 
> be appreciated.



>The problem with a net metered PV system using the SW-series inverter with
>batteries is that the inverter operates at the nominal battery voltage, 
>not the
>optimum PV array max power point. Since the batteries are just sitting there
>being float charged and power passes through the inverter to the load and 
>grid,
>can the SolarBoost send max power from the array to the inverter? Has anyone
>used a SolarBoost to get around this SW inverter shortcoming?
>==^================================================================
Solarwinds NorthernLights
Serving Mid Coast Maine & Northern California
          610-517-8401              707-498-2804









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