FAQ

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BATTERY SELECTION FOR OFF-GRID SYSTEMS Choosing the appropriate battery for the application is key to long battery life and performance. Once the load i...
Sun, 7 Jun, 2020 at 5:10 PM
To test battery health and determine if a cell may not be performing you may perform a voltage check on all batteries in the string when they beginning the ...
Sun, 18 Oct, 2020 at 4:32 PM
CCA (Cold Cranking Amps) - the number of amps that the battery can produce at 0 degrees F for 30 seconds.
Wed, 24 Sep, 2014 at 4:42 PM
Rolls batteries have been designed to provide many cycles and therefore long life. This long life, however, is dependent on the correct charging regime.  ...
Tue, 26 Aug, 2014 at 4:22 PM
DISCHARGE RATES Discharge and recharge rates should be considered when selecting and sizing a battery bank. Battery manufacturers publish multiple disch...
Sun, 7 Jun, 2020 at 4:58 PM
GRID-CONNECTED BACKUP There are two distinct uses for a grid-connected battery bank. The first, and the most common is a power backup system. The purpos...
Sun, 7 Jun, 2020 at 5:11 PM
Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points. Introducing ...
Sun, 29 Mar, 2020 at 11:43 AM
Battery capacity and battery recharge times are all based on each cell having an electrolyte temperature of 25ºC (77ºF). Temperatures below the nominal 25ºC...
Wed, 3 Jun, 2020 at 7:12 PM
Peukert's Formula, T = C / In (or C = T * In)  C is theoretical capacity (in Amp-Hours (AH), equal to actual capacity at one Amp) I is current (in...
Thu, 28 May, 2020 at 2:23 PM
RC (Reserve Capacity) - the number of minutes that the battery can deliver 25 amps while keeping its voltage above 10.5 volts. Typically a deep discharge ...
Mon, 1 Sep, 2014 at 1:02 AM