Will this combo work? 330watts pv on blue sky controller

ayurtdweller · May 2017

I am looking for a low cost, high power mppt controller and have come across this. Blue Sky 1524ix
http://www.blueskyenergyinc.com/products/details/solar_boost_1524ix

Output Current Rating	20A max (12V battery & 12V PV’s) • 15A max (battery or PV’s > 12V nominal)
Nominal Battery Voltage	12 / 24 VDC
PV Input Voltage	57VDC max (Recommend max Voc at STC ≤ 45.6VDC

It gives max input ratings for a few different pv cell configurations. I'd like to use it on a 12v battery using one of these panels: https://www.civicsolar.com/product/canadian-solar-maxpower-cs6u-335m-335w-mono-slvwht-1000v-solar-panel-t4

Module Watts STC:

335 Watts

Module Watts PTC:

307.10 Watts

Max Power Voltage (Vmpp):

37.80 Volts

Max Power Current (Impp):

8.87 Amps

Open Circuit Voltage (Voc):

46.10 Volts

Short Circuit Current (Isc):

9.41 Amps

Is this a dumb idea?

Estragon · May 2017

Where are you located? The Voc could be a problem, because on a cold morning before the sun hits the panel to warm it up the voltage could get too high. A slightly smaller ( eg ~250w) panel would likely have a low enough Voc.

If the panel can never get cold in your location you might be able to get away with it.

ayurtdweller · May 2017

New Hampshire....cold enough!
Temperature Coefficient (Voc) -0.31 % / °C

Estragon · May 2017

Probably doesn't get cold enough there to overvoltage (we see <-40C here), but you might want to consider the smaller panel to be sure. The panel will be a little easier to handle physically as well. The bigger ones are definitely a 2 person job to handle.

Will this combo work? 330watts pv on blue sky controller

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