How can I compare a battery bank?
A battery bank is compared with other battery banks by the amounts of available voltage and amperage in each. On this page you will see examples of battery banks where the voltages and amperages are listed, according to what our supplier has told us.
Example:
As an example of small household item capacity: First you need to decide how much voltage and amperage that you need. The common household voltage is 110 to 120 volts for small items, so we say for calculations 120 volts. Then you need to decide how much amperage that you need. The common household breaker-box has a 100 amp rating for small items, so we say 100 amps. At this point you can go directly to the charts below and figure what you need, within reason, and we say "within reason" because the charts are estimates and can be changed by adding or subtracting batteries from the charts. Let's say that (for example) someone needed 120 volts and 100 amps, using Table BBP04 should be able to handle that. We multiplied the voltage (120 volts) by the current (100 amps) and got 120 x 100 = 12,000 Watts (or 12kilowatts, or 12KW, or 12 kilo volt amps, or 12 kva, or 12 KVA). How long do they want that backup supply to last? Let's say 4 hours is sufficient. That is a full load of 100 amps drawn at a continuous 120 volts for 4 hours. That would be row number 6 of that table,
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6
|
18
|
4.83
|
80
|
12,000
|
5,760
which shows the maximum available wattage at 18 Kilo-Watts, the maximum estimated time for full draw on the batteries at 4.83 hours, the number of batteries required is 80, the price of the batteries (alone without anything else, and in the Frederick, Maryland area) is (according to our supplier as of August 15, 2008) $12,000, and the total weight (without shipping crates and packing) 5,760 pounds.
Further example:
Let's say that someone had an electrician put in a 60 amp breaker panel. That is less than 75 amps, so table BBP03 would work, and if they wanted twice the amount of hours (now 8 hours) of backup then row 8 of that table would work for the same price (estimated).
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8
|
9
|
9.67
|
80
|
12,000
|
5,760
As you may have noticed, we estimate the amperage requirement higher than the need. Our battery supplier has informed us that we should overestimate a little because batteries vary in output under various conditions.
This is a battery bank comparison using deep draw batteries purchasable locally (Frederick County) in Maryland.
The prices listed are OUR costs as of August 15, 2008, and are subject to change. If you order these, our supplier (not we) will be making the sale and might have to add shipping and handling. These are heavy duty and VERY HEAVY in weight.
If you order 10 or more batteries, and the shipping to address is in Frederick County, Maryland then our supplier says that the shipping is FREE.
The following
does not include installation at your site. But we CAN build a full battery backup for you AFTER and ONLY AFTER you have purchased a Wind Powered Generator from us. Wind Powered Generators come first. Buy at least one Wind Powered Generator from us and THEN we can give you a price for a full battery backup system. If you ask ahead of time, the answer is "no."
We do not manufacture these batteries. We do not guarantee these batteries. We have chosen these batteries because they seem to be the most reasonable for power backup at their price.
If you are uncertain of these prices, please check out the prices on the internet of other suppliers. We did and we found other places that were much higher in price.
We at reasonablepower.com do not know of anyone (other than us), at this time, that satisfies us with their grid ties, therefore we consider using batteries to be a reasonable storage of some of the wind power generator's energy until it is needed.
