- Size of a home has nothing to do with the system one needs to install. It depends on the average total energy per day needed to operate lights, fans, otherMessage 1 of 20 , Nov 11, 2006View SourceSize of a home has nothing to do with the system one needs to install. It depends on the average total energy per day needed to operate lights, fans, other small appliances (like radio, TV etc.) for a Stand-Alone System, which would require a battery bank to store energy during the time SUN-shine is not available.For a grid-tied, one does not need battery-bank to store energy as PV-array continuously feed s the energy to the grid through an Inverter plus a few essential parts.Bashir A. Syed----- Original Message -----From: noyes livingstonSent: Saturday, November 11, 2006 5:54 AMSubject: Re: [hreg] Technical questionsJohn,I spoke to you earlier and never moved on it. I have enough money to at least put in a solar powered attic fan and perhaps for a small emergency solar powered backup due to power loss.I would also like to know if you could direct me in obtaining a loan ( I understand there are govt backed loans for "green" projects) to set up a decent RE system. The idea is to create a patio that has enough solar panels mounted to provide power to at least some loads in our home.I would like to eventually move out of Houston and move on to bigger projects and learn. Incidentally, my father has a home in Port Aransas and I am trying to sell him on the idea of a small turbine. Do you have any idea on the cost to power a home of less than 1000 ft sq with modest electricity demands?Noyes Livingston----- Original Message ----
From: John Miggins <jmiggins@cox. net>
To: hreg@yahoogroups. com
Sent: Monday, October 23, 2006 9:23:02 AM
Subject: Re: [hreg] Technical questionsKim, here is a handy guide to help size the battery bank and solar system.there needs to be some judgement applied to this as to how many days of back-up you want etc...AGM batteries are less hassle since they require little maintenance, they will last from 3 to 5 years. Most large solar system used lead acid, unsealed batteries that allow you to check the state of charge and add water when needed. They last longer so cost less in the long run.Rolls Surrette, Trojan or others are a good investment. If the batteries are just for occasional use for back-up I would then use sealed ones .Google Solar batteries and you will find more info than you need.John Miggins
Harvest Solar & Wind Power
"renewable solutions to everyday needs"
Cell: 918-521-6223----- Original Message -----From: Garth & Kim TravisSent: Monday, October 23, 2006 8:57 AMSubject: [hreg] Technical questions
We are working on a back up system for our home for when the grid is
down. We have a 2500 watt inverter that for now is running off my
tractor, but I would prefer to have a battery bank for it and just
charge it from my tractor, as a first step. I have our power
consumption figured at a maximum of 18 KWH per day. How do I
translate this to watts or amps or VAs so I can size the battery
bank? If you choose to give me the answer, please be kind and show
your calculations so we can learn something.
What is the opinion of AGM batteries? Are they worth the extra
money? Garth's company has recently started using them, but not for
long enough for him to form an opinion of them. The companies
decision is not necessarily a good recommendation.