Posted by dold on October 9, 2007, 8:42 pm
Is there a peak startup draw to that unit, and a much lower runing rate?
Clarence A Dold - Hidden Valley Lake, CA, USA GPS: 38.8,-122.5
Posted by Ben on October 9, 2007, 11:15 pm
I'm sure there is but waiting on my "Kill-a-Watt" meter to measure.
Posted by Brian Graham on October 10, 2007, 3:06 pm
I bought a new fridge about a year or so ago. Run wattage was similar to
the figure you calculated, but the MEASURED daily consumption was only
800WH, not the 2800 you expected. Indeed, my chest deep-freeze is rated at
2kwh per day. So you've over-estimated your requirements, hence the cost of
Still, its expensive and a long-term proposition from a financial
Points to consider: 1) A good starter system (no rebates) would likely
cost you as much as a new car, but wouldn't amortize to $ in 5 years. 2)
The first time it keeps the house warm and the food from spoiling when the
grid goes down for a week, its paid in full. From my persective.
Posted by Ben on October 10, 2007, 8:14 pm
Good points thank you. The grid does go down in that area almost every
winter for a couple days due to ice storms. I haven't given up on this just
need to re-think it, ask more questions.
If I tie to the grid Ron had stated the batteries wouldn't be needed and his
follow up stated I could use the panels for up to 50 years. With those
variables my annual cost would come down considerably ($,000 / 50 years is
$60 per year). So, if they actually last that long we're getting closer to
my target. The batteries WOULD be needed to keep things running when the
grid goes down though.
My target is $5 per year to run this system.
I'm also considering ground heat exchange and use of air as a heat exchange
during winter months to supplement. Brain storming really, I know the
solution to this problem exists and may require a marriage of several
technologies. Ideas are welcome.
Once again thanks.
Posted by Terryc on October 10, 2007, 11:25 pm
Sounds like a backup generator is called for rather than PV.