Close to all of it. A LiFePO4 pack can run to a deep depth of discharge cycle after cycle, while a lead acid or AGM battery is generally held to about half its rated capacity to protect service life. A 100 amp hour lithium battery replaces roughly 200 amp hours of lead acid in practical terms, and it accepts a much faster charging rate on the way back up.

Start with your daily watt hours, divide by the system voltage to get amp hours, then add margin for inverter losses and the days of autonomy you need. Lithium changes the math against lead acid, since you can plan around most of the rated capacity instead of half of it. Our solar calculator totals the load for you, and our guide to designing a commercial off-grid system walks through the full sizing sequence.

Match the bank to the inverter, and let system size decide. A 12 volt bank suits RVs, work trucks, and small backup systems. Moving to 48 volts cuts the current for the same load, which means smaller cable, smaller fuses, and less loss on long runs, so larger commercial builds usually land there. Our 48 volt inverters pair directly with the industrial grade packs.

Most installs need three things beyond the battery itself, cable sized to the load and a properly rated fuse on the positive run, at minimum. Undersized cable is the most common install problem we see on the phone. Browse our UL listed battery cables and inline fuse kits, or start from a battery kit that ships with the cables and hardware already matched.

No. Different chemistries have different charge voltages and internal resistance, so wiring them together means one bank constantly charges or drains the other and both wear out early. Replace the whole bank at once, or keep the AGM bank on its own circuit with its own charge source.