Foretravel Owners' Forum

Foretravel Motorhome Forums => Foretravel Tech Talk => Topic started by: Barry & Cindy on July 21, 2012, 12:08:09 pm

Title: Unisolar panels (was Re: Removing oxidation from gelcoat)
Post by: Barry & Cindy on July 21, 2012, 12:08:09 pm
I'm getting ready to install two Unixolar self-stick panels and want to remove all the oxidation where they'll be installed; but I don't want to do anything that will detract from the ability of the panel to stick itself to the fiberglass roof.

In case you have not purchase your Unisolar flexible self stick solar panel, you may want to know the company is bankrupt:
With no buyer for Uni-Solar, bankrupt ECD to lay-off 300 - Solar - Renewable (http://www.rechargenews.com/energy/solar/article312862.ece)
Title: Re: Unisolar panels (was Re: Removing oxidation from gelcoat)
Post by: wa_desert_rat on July 21, 2012, 03:59:33 pm
In case you have not purchase your Unisolar flexible self stick solar panel, you may want to know the company is bankrupt:
With no buyer for Uni-Solar, bankrupt ECD to lay-off 300 - Solar - Renewable (http://www.rechargenews.com/energy/solar/article312862.ece)

They've been in bankruptcy for quite a while but their products are still out there. Probably with no warranty protection but sometimes the warranties are not all that great anyway. I bought mine for $90 for a 68-watt panel which, given the fact that they fit along the edges of the coaches roof, is not a bad deal. They also operate well when partially shaded. Some say even when fully shaded. :P

The advantage - other than the shading - is that they are 15-inches wide and 11-feet long and flexible enough so that you can roll them down along the top edge of the rooftop.

Craig
Title: Re: Unisolar panels (was Re: Removing oxidation from gelcoat)
Post by: lgshoup on July 22, 2012, 09:31:27 pm
Solar pannels total 465 watts. Really happy with them three are 75's and two are 120's. Catches us up usually by noon or so each day. Not afraid to use inverter, etc.
Title: Re: Unisolar panels (was Re: Removing oxidation from gelcoat)
Post by: wa_desert_rat on July 23, 2012, 12:08:12 pm
I have two 68-watt Unisolar flexible panels. Their great advantage is that they are 15-inches wide and 11-feet long and flexible enough so that I can install them along the edge of the RV's rooftop (where it's somewhat rounded right at the edge) outboard of air conditioners, vents, etc. This is relatively unused space. Another advantage was the price of $90 each.

Their other advantage is that they still work in partial shade conditions where solid panels reduce their output almost 100% when just a part of the panel is shaded. Since RV roofs have lots of shade potential (air conditioners, antennas, vents, etc.) this is a valuable property. Just a length of rope on a standard panel can reduce its output by 90%!!! But shading a flexible panel barely reduces the output at all.

I also have two 240-watt solid panels rated for 24vdc and an MPPT controller that will accept the two large panels in parallel and the two flexible panels (12vdc panels) in series and then convert everything down to 12vdc for the batteries.

The flexible panels cannot be tilted because they will be glued to the RV roof with their own bonding agent (peel and glue). The solid panels will be mounted using VHB tape on mounting points that will allow me to at least tilt the panels somewhat to increase their efficiency.

This gives me at least the possibility of over 600-watts of power. On the DC side I am slowly converting all interior and exterior lighting to LED. All incandescent lights have been changed already and the fluorescent lights will be changed as ballasts fail. I expect that furnace fans in the winter will be the biggest drain in terms of amp-hours.

On the AC side, we installed a 1500-watt "pure sine" inverter last month. The TV and BluRay together draw less than 40-watts of power. Microwave would be the largest single point draw but if I go to a standard refrigerator system that will change and I might have to move to a larger inverter. With any luck the pricing for those will drop further over the next few years.

The goal is to be able to spend a week-at-a-time on an Ejido beach in Baja with trips to town for water, propane and dumping tanks. Some of these beaches have services for all this (at a price, of course).  Works for Quartzite, too. :)

Running the generator an hour or so every week just to keep it in decent operating condition seems like another worthy goal. :)

Craig