It doesn't take a very large array to generously power both some if not all of a camp's summer consumption through net metering and a good sized battery to store the power for the darker, stormier hours. A 12 module tilting array on a single 8" upright should be more than enough for most.
Many of the recent batteries released not only feature self heated cabinets, they are also fully NEMA rated.
If you wish to be a renewable naysayer, fine, everyone is entitled to their opinions ,,,but at least be sure that you knowledge on the subject is up to date. I have a half a dozen fully off-grid installations on Winni, and in spite of today's ice event I can tell you form thier monitoring that all are powered up. Grid connected with battery backup is not much different, for most a half a dozen modules or so on a roof and a small battery would be plenty enough to keep circulators running when the grid is down like now and the foreseeable future on any lake island that has lost grid power.
Lastly a perfect solar south orientation (194') will produce the greatest amount of harvest, but any roof with 3-4 hours will produce enough for the emergency needs originally addressed in this string. For a true off-grid situation where the solar harvest is critical a perfect south orientation is usually actually to two planes facing east and west. The perfect south orientation will provide the greatest harvest, but mainly between 10 and 2 pm. The E/W array of the other hand will provide a much longer harvest day and this is more valuable when a battery is involved ...and the circulators need to be kept running 24/7.
I have a very small off grid inverter (1500 watts AC) on my waterfront powered by three 100 watt panels mounted on tree trunks, one module south, one SE, and one SW. It is plenty enough to run lights and a small stereo year round, and even brew a pot of coffee in the summer. Would it run a dock circulator pump? Probably not, but this should give you an idea of what even a small system is capable of. I have less than 3K invested in the whole system, two 100 amp hour carbonized AGM batteries included and it all sits in a 7' unheated Rubbermade shed unattended all winter long without issue becuase I leave the inverter alive and a charged battery doesn't freeze.
|