I hope to not get into a discussion of speculation, but I have lived off grid for many years, and have worked in the "alt. energy" field for even longer. I believe from my experience, that Capt'n Carter is a bit closer to the correct speculatory answer than any other. Yes there will be changes and improvements, but as we approach better systems, the amount of improvement gets less and less, until and if we come up with an entirely new way of converting energy from one kind to another. I have build homes that in the day-and-age it was built, actually made enough excess power, that when sold back to the utility company, paid the mortgage. That being said, when one tallies up the costs of installation and maintenance, the system was equal to the 20 year cost of the same energy from the utility company. The only real advantage I found, was that I never had an "unscheduled" or "unintended" outage. I had moments (even hours) of power being off. But, I was in full control of when that was. This was not always the case with others that installed inferior systems. But then this is way off the subject isn't?
Dan
Sent: Sunday, February 14, 2016 9:05 AM
Subject: Re: [Electric Boats] Solar Array Recharging Battery Bank to 100%
I think you're predictions about cost and efficiency are a little optimistic. While technology will certainly continue to improve incrementally, it seems very unlikely, (although admittedly possible), that we'll all be sporting 40% eff. panels anytime soon. But even at a nominal 15% efficiency typically found today for 50 cents a Watt and balance of system hardware down to about $1.5/W, the technology works plenty good enough to easily go off grid in style for relatively low cost. If you compare to living off grid using a generator, the saving in equipment depreciation, maintenance, and fuel will easily pay for for a solar system in very short order and you don't have to listen to that infernal combustion engine running all the time.
Captain Carter
www.archemedesproject.blogspot.com
On Saturday, February 13, 2016 3:45 AM, "Hannu Venermo gcode.fi@gmail.com [electricboats]" <electricboats@yahoogroups.com> wrote:
Its highly likely that within 3-5 years, PV panels will go to 40% or so
efficiency.
At approx 0.30$ / w cost, from current 0.38 (manufactured) 0.50$ retail
pricing.
One approach is refletive panels, using the undersneath ide as well.
Thus, in 5 years, the same sized panels will give approx 2.3 times more
energy, at 30% less cost.
The controller prices will also drop imho == 80%, from 20-50% system
price to less than 10%.
This is because volumes go up, and manufacturing controllers has very
low incremental cost/w.
A 1000 W controller costs approx 20$ in parts to manufacture - just like
a servo drive.
Large boats can be self-sufficient for 2-4 days, fairly easily.
This gives instruments, comfort, (and maybe) some ac.
See windhorse from dashews for example. 2 kW panels.
2 kW is only 1500$ these days.
On 13/02/2016 03:22, moriartybob@yahoo.com [electricboats] wrote:
> Nothing revolutionary, but maybe encouraging to others considering
> going solar.
>
> My very nice Electroprop All-Energy Racer system is connected to a 580
> watt (peak) solar bimini. After the most recent sea trial I decided,
> as an experiment, to sever shore power and see if the solar array
> would completely recharge the 210 Ah @ 48V battery bank.
--
-hanermo (cnc designs)
------------------------------------
Posted by: Hannu Venermo <gcode.fi@gmail.com>
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efficiency.
At approx 0.30$ / w cost, from current 0.38 (manufactured) 0.50$ retail
pricing.
One approach is refletive panels, using the undersneath ide as well.
Thus, in 5 years, the same sized panels will give approx 2.3 times more
energy, at 30% less cost.
The controller prices will also drop imho == 80%, from 20-50% system
price to less than 10%.
This is because volumes go up, and manufacturing controllers has very
low incremental cost/w.
A 1000 W controller costs approx 20$ in parts to manufacture - just like
a servo drive.
Large boats can be self-sufficient for 2-4 days, fairly easily.
This gives instruments, comfort, (and maybe) some ac.
See windhorse from dashews for example. 2 kW panels.
2 kW is only 1500$ these days.
On 13/02/2016 03:22, moriartybob@yahoo.com [electricboats] wrote:
> Nothing revolutionary, but maybe encouraging to others considering
> going solar.
>
> My very nice Electroprop All-Energy Racer system is connected to a 580
> watt (peak) solar bimini. After the most recent sea trial I decided,
> as an experiment, to sever shore power and see if the solar array
> would completely recharge the 210 Ah @ 48V battery bank.
--
-hanermo (cnc designs)
------------------------------------
Posted by: Hannu Venermo <gcode.fi@gmail.com>
------------------------------------
------------------------------------
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Posted by: "Dan Hennis" <dhennis@centurytel.net>
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