Acid Agm
A look at what is currently available on eBay
 12V 1.2AH SLA SEALED LEAD ACID AGM BATTERY UNIVERSAL US $16.00 
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 UB12220 12V 22Ah Sealed Lead Acid (SLA) AGM Battery US $53.95
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 TWO UB12120 12V 12Ah Sealed Lead Acid SLA AGM Battery US $62.95
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I'm building a solar panel (70-100 Watts) and i don't know what size battery makes sense to use?
Please recomend one of these batteries in which to store the power generated by my solar panel.
http://search.greenbatteries.com/search/Category-Rechargeable_Batteries--SubCategory-rechargeable_lead_acid_batteries_-_SLA%2C_AGM%2C_deep_cycle--_autodone-http%3A%2F%2Fstore.yahoo.com%2Fgreenbatteries-store%2F--catalog-greenbatteries-store--keywords-deep_cycle_12V--x-0--y-0
PS the panel is 12V
Generally, the larger the battery, ie, the amp-hour rating is higher, the better you are, as you can store more energy. So it's a trade-off of capacity versus price and size. You have to decide that trade-off, you know the parameters, I don't.
You may want to get a battery rated for deep discharge. Most lead acid batteries (auto type) cannot be completely discharged without damaging it. These are sometimes referred to as "marine batteries".
100 amp-hour is about the biggest, and your 100 watt panel will take about 12 hours to charge it.
You will need a panel output of 15 volts in order to charge a 12 volt battery, 12 volts is not enough.
You will also need a charge controller of some sort to avoid overcharging the battery and damaging it. A good one will use a DC-DC converter to increase the voltage to that needed to charge the battery.
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October 18th, 2007 in
Uncategorized | tags: acid, agm, agm lead acid, agm vs lead acid, batteries, battery, lead, sealed, sealed lead acid agm, sla