Looking for Answers about UPG Sealed Lead-Acid Battery - AGM-type, 12V, 250 Amps, Model# UB-8D?

This is a 250 amp hour battery, specified at a 20 hour rate. This means a battery with 250 Ah capacity will operate at a discharge rate of 12.5 Amps (250 Ah/20hours) for about 20 hours.

The ampere hour(Ah) of a battery tells how much energy can be stored inside. More batteries means more energy stored. The number of solar panels will determine how fast you will charge those batteries. More panels means faster charging. The system also would require a charge controller between the panels and the batteries to prevent overcharging(1 amp for every 15 watts of panels). The inverter will convert the 12 volt power of the battery into 120 volt power to use. The size of the inverter determines how much power can be pulled from the battery at any one time. How long it will power your item(s) will depend on how much power is available in the batteries. Based on how much energy needed to run your item(s) and how long you want to run them each day, you could then determine how many panels and batteries would be needed.

The recommended max charge will differ due to the temperature at the time of charging. However at 25 degrees Celsius and 77 degrees Fahrenheit the set point for the charge voltage per cell is 2.40 and would vary between 2.37 to 2.40 with a max charge current of 0.20.