[RE-wrenches] strings of older solar panels

Solar Plexus solplex at montana.com
Wed Nov 18 09:32:48 PST 2009


Hi Wrenches.

	I have a customer with 32 of the Solarex MSX-64 solar panels an a  
battery-based system.  He wants to go batteryless inverter.  So I am  
looking at  2 strings of 16 in series.    But the solar panel spec  
sheet doesn't say anything about system voltage rating.  Can I do this?
	 If  one solar panel in the string is shaded, does it see the full  
string voltage of around 280 volts?  Is there something in the way  
new panels are made that makes them more able to handle this voltage,  
or is it just that they are now tested for it?
	My guess is this request may be happenning a fair amount.  Is there  
a reason these panels are not listed on the California GoSolr website?

Lee Tavenner
Solar Plexus
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