Magnum 53 Hybrid

A lot of people around these forums use very broad assumptions based on the whole market but you are not doing your research.Canadian solar who I have used(yes a Chinese company before anybody starts) offer a 20 year parts and performance warranty including their micro-inverter if installed now this will probably not be valid on a boat which is why sweeping statements are no use. However the quality is their.

 

I've heard of a few early failures of PV installations, but all seem to have been wiring related, rather than panel related. Here in the UK we had a bizarre situation last year where the government announced a 50% cut in the subsidy for people fitting PV to their homes. As a consequence, there was a crazy rush of people trying to beat the deadline and we had PV installers literally working every hour of daylight to rush to get installations completed. One consequence that seems to have arisen is that we're now getting a crop of wiring fires and burnt out connectors on roofs, and I'm near-certain that that's mainly down to poor installation workmanship during the boom. From what I can see, even the fairly cheap panels are still performing well, as provided they stay well sealed there's no real reason for them ever to fail (although their output will drop slightly as they get older).

 

Gentlemen,

You got it covered.

 

The problem in PV world has a name: China. On the other hand, and paradoxically, the blessing of the PV world bears the same name.
Fact is, their mass-production low-cost panels have allowed the drop in price and a wide diffusion of PV systems worldwide. However, at the same time the fierce competition from Chinese manufacturers has forced other brands around the globe to look more at savings and less at quality, in order to keep up and not go into bankrupcy.

I've checked out some info in internet, FWIIW, and it looks like today there indeed is a significant percentage of PV panels rolling out of factory with latent defects. They are mostly related to bad solder bonds between some PV cells, which may lead to a partial failure of a PV module. There appears to be a number of studies confirming this. Found also an interesting article about this issue: http://www.renewableenergyworld.com...lar-struggle-a-rise-of-poorly-made-pv-modules
A japanese study of the problem: http://www.iea-pvps.org/index.php?id=15&eID=dam_frontend_push&docID=1275 taken from the site http://www.iea-pvps.org/

Of course, it also means 95% of panels are ok. Depends on how one wants to look at the problem.

 

These are the figures Torqeedo has posted for the batteries for its newest electric out board

Battery Cost

Number of batteries 2 3 4
Capacity in kWh 26 39 52
Total battery bank cost USD 32,998 49,497 65,996
Total cost per year in USD* 3,666 5,500 7,333
Electricity Cost

Cost per kWh in USD 0.112 0.112 0.112
Single charge (80%) in USD ** 2.41 3.62 4.83
150 charges per year (80%) in USD ** 362 543 724
200 charges per year (80%) in USD ** 483 724 965


Total cost per year of 150 days
usage in USD ** 4,028 6,043 8,057
Total cost per year of 200 days
usage in USD ** 4,149 6,224 8,298
* Based on 9 years

 

If I read the first two rows correctly then cost per kWh is, respectively:
32998/26 = 1269.15 USD
49497/39 = 1269.15 USD
65996/52 = 1269.15 USD

Not 0.112 USD ...

 

I don't think he meant cost of kwh of storage capacity but cost of 1 kwh of electricity from the utility company.

Isn't that in the range for e pricing ?

 

I believe the cost of .112 per kwh is the price of electricity in Florida and they are using this as the basis for the cost of recharging the batteries using the grid. I will have to go back and read it again.

 

Typical cost per kWh for lithium batteries of reasonably good quality is around $500 to $600 for large capacity packs, so those Torqeedo prices seem about right. This is the raw cell price, to which the cost of the battery management system, battery housing, and, for installed boat use, fire suppression system, needs to be added.

 

Oh... Yes, that seem to be right.

 

I wanted to know the figure based on a lets say 15kw generator on a boat and that should include maintenance costs, I estimated at .50c

 

That was the first thing I told him 6 days ago... and perhaps now not to believe advertising claims.

What you need to do John,is find out exactly how many HP it takes to run your boat at 5 knots and then go from there.

 

Jeremy, the Torquedo system is complete with marinized housing and bms included if its the one I'm thinking of.

http://www.torqeedo.com/us/electric...lligent-lithium-battery/features-and-benefits

 

I'd like to see "hybrid" in keel-boat.

Use the heavy batts as the ballast. Use elec motor to get in and out of marina to avoid firing up engine.

Use electric instead of gas or alcohol for appliances.

Trickle charge with solar or even prop if running hard downwind.


Not really seeing it on large(too big to tow to restricted lakes) power boat but quiet trolling would be nice.

 

I am against this one. Using electric energy for cooking appliances is a waste of energy and batteries. Much better and much more ecological (if that's the driving spirit of the project) is to use gas or alcohol for this application.