Lead-acid batteries have a lower upfront cost, but shorter cycle life and stricter depth-of-discharge limits — you typically can't use more than 50% of the rated capacity without shortening their lifespan.
Lithium iron phosphate (LiFePO4) batteries cost more per kWh initially, but allow deeper discharge (often 80-90%), last several times longer in cycle count, and need essentially no maintenance compared to lead-acid.
Over a 10-year ownership period, LiFePO4 often works out cheaper per usable kWh once you account for lead-acid's shorter replacement cycle.
The right choice depends on budget flexibility today versus total cost over the system's life — worth running both numbers for your specific usage pattern.
A practical look at how monthly electricity bills translate into system size, investment and payback.
What net metering means for a grid-tied system and what to check before commissioning.
Battery Energy Storage Systems can shave peak-demand charges for commercial sites.
Get a free site survey and a system sized right for your roof and your bill.
