4-16-2014 :OK - thanks for all the comments and views.....here are some answers for the frequent questions.... The panels are Helios usa made 255 watt model x 4 cost about 2,000 w shipping. The Aims inverter is recommended for 700+ $ -its still working- and I MOVED IT INTO THE CABIN away from the batteries.....yes the battery box is well vented at the back. It almost never freezes around here......even water ....let alone battery acid.....some places in the country will get that cold .... but not here. The total cost with lumber batteries and a cheap charge regulator was 3,800. It was build AFTER I found out how much the cabin needed. There is no need to overbuild when money is an issue. It works great and only ran out of power once. Thanks again for all the views.