[Energy] 30 watt pv system completed

Eric Broadbent ebroadbent at me.com
Sat Dec 3 15:41:07 EST 2011


What do you think of this system?

	http://www.provantage.com/athenatech-mic-40w~7ATHN03V.htm

It seems to compare reasonably well with this - on Ed's sundance solar site:

	http://store.sundancesolar.com/20wadosoenst.html

In thinking about this - I realize that bringing a 3x5 - or larger - PV panel to Dewey Square would arouse the attention of our esteemed public safety officials, who are no doubt there for our protection but nonetheless might judge such a thing unfavorably.   So the smaller system you and Ed have put together is really good for that reason.

A 12V battery charging system does allow for some amount of standard-appliance AC power - as Sage has suggested.  During the last couple of storms that have knocked out power I've run a sump pump intermittently, a freezer for about 30 minutes every 6 hours, and a couple of lights and laptops continuously off of one 12V battery with a 1200W inverter.  I had to charge the battery during this time to be able to run all this, and I don't know how many amp-hours or overall power drain it was, but a good charge controller should help understand this.

Anyway, it sounds like there will be a bike-gen build tomorrow as well as the delivery of this 30W charging system - so if folks can let us know the timing of these things that would allow others to participate and learn.  Thanks very much.

-Eric B.

On Dec 3, 2011, at 9:58 AM, roy.morrison114 at yahoo.com wrote:

> The major issue with PV use is battery storage size in amp-hours and power output of the collectors to meet the load.
> 
> To run stuff like computers will quickly drain the fully charged battery of Ed's system that could fully recharge 8 cell phone batteries a day - or run some low wattage LED. Useful, but not huge.
> 
> For bigger stuff Ed can design systems from components, bigger batteries, bigger panels as well as sell ready made commercial rigs.
> 
> He's the man and has been designing and building systems for years. He put together the occupy rig from stuff laying around his shop in a few hours.
> 
> You can get some sense of what he can offer on his website www.sundancesolar.com
> 
> Roy
> 
> Roy
> Sent from my Verizon Wireless BlackBerry
> From: Eric Broadbent <ebroadbent at me.com>
> Date: Fri, 02 Dec 2011 21:03:30 -0500
> To: Roy Morrison<roy.morrison114 at yahoo.com>; Dana Moser<dana at occupyboston.org>
> Cc: <energy at lists.occupyboston.org>
> Subject: Re: [Energy] 30 watt pv system completed
> 
> Very cool.
> When do you think Ed will have the parts list to share?
> 
> So this is a battery-charging system, which is what I had thought was the primary goal, but then I re-read an email from Sage who was asking for 100W panels - has an inverter, and is aiming at powering normal AC type stuff (in the media tent, etc.)
> 
> What is needed most if we are going to set up a supply-chain of sorts?
> Should there be some of both kinds of systems?
> 
> I called Home Despot to see if they have panels in the store, and they don't.  You have to order online and they are delivered.
> Also contacted a solar supply warehouse in Gardner, and they are getting back to me in the morning with prices - but I need to give them a panel spec, which goes back to the question.
> Same thing if we want people to donate $ for systems which will be purchased from a supplier.
> A nationally known online site is willing to try to set this up (for other Occupy sites too) if the panels are US-made - which seems completely in-line with the goals of Occupy.
> (Buying cheap stuff from overseas is not in anyone's interests...)
> 
> Sorry - I know this is a lot to raise, but the basic question is what is the kind of system that makes the most sense to assemble (and ask for donations for)?
> 
> Thanks,
> -Eric B.
> 
> On Dec 2, 2011, at 8:47 PM, Roy Morrison wrote:
> 
>> 
>> Ed Bender of Sundance Solar in NH has fabricated a prototype 30 watt PV system charging a battery   in a small cooler box with voltage controller and two plug in ports rigged for cell phone charging.  (See photos sentseparately.
>> 
>> The system uses a very durable flexible solar panel designed for Marine applications. The prototype has the panel hard wired into the cooler. Subsequent versions will have a plug in design to allow the panel to be disconnected.
>> 
>> Ed has put instructions for operation inside the lid of the cooler box
>> 
>> The cooler box makes the system  moderately weather resistant. The box should be kept in a tent or under cover for charging, The panel is very, very durable and in full sun should charge the battery in four hours.    
>> 
>> I will deliver the system on Sunday afternoon. Ed  used available parts and I paid a discounted price for the system that I will donate to Occupy..
>> 
>> Ed is developing a parts list, instructions for assembly and cost for parts, as well as prices for purchasing assembled systems.The intention is developing low cost, potentially do-it-yourself systems.
>> 
>> Where shall I drive to deliver the system? 'The weight is about 20-25 pounds for the charger box plus the attached panel.,
>> 
>> Roy
>> 
>> 
>>  
>> Roy Morrison
>> roy.morrison114 at yahoo.com
>> sustainability at snhu.edu
>> www.RMAenergy.net
>> www.EcoPowerHedge.com
>> www.EcoCivilization.info
>> 603-496-4260
>> P.O Box 201
>> Warner, NH 03278
>> ----- Forwarded Message -----
>> From: Ed Bender <ed at sundancesolar.com>
>> To: 'Roy Morrison' <roy.morrison114 at yahoo.com> 
>> Sent: Friday, December 2, 2011 3:00 PM
>> Subject: RE: Occupy PV?
>> 
>> Pics.
>>  
>> Ed Bender
>> President, Sundance Solar Products, Inc.
>> http://store.sundancesolar.com/
>> 672 Currier Rd.
>> Hopkinton NH 03229
>> 603-225-2020 v.
>> 603-225-2022 f.
>> -----Original Message-----
>> From: Roy Morrison [mailto:roy.morrison114 at yahoo.com] 
>> Sent: Thursday, December 01, 2011 3:05 PM
>> To: Ed Bender
>> Cc: Pentti Aalto
>> Subject: Occupy PV?
>>  
>> What the status? Shall I come over?
>>  
>> Roy
>>  
>> Roy Morrison
>> roy.morrison114 at yahoo.com
>> sustainability at snhu.edu
>> www.RMAenergy.net
>> www.EcoPowerHedge.com
>> www.EcoCivilization.info
>> 603-496-4260
>> P.O Box 201
>> Warner, NH 03278
>> 
>> 
>> 
>> 
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> 

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