The upfront price tag on a lithium battery can be double or more what you would pay for tubular lead-acid. But sticker price is only half the story.
A quality tubular battery is typically rated for 1,200-1,500 cycles at 60% depth of discharge. A LiFePO4 lithium battery is commonly rated for 6,000+ cycles at 95% depth of discharge. In practical terms, that is roughly four to five tubular replacements over the lifespan of one lithium battery.
Because tubular batteries should not be discharged past about 50-60% without shortening their life, you effectively pay for capacity you cannot fully use. Lithium's deeper safe discharge means a smaller-rated lithium bank can replace a larger tubular one.
Tubular batteries need regular water top-ups and are sensitive to being left in a discharged state — both add real time and risk over a decade of use. Lithium batteries with a built-in battery management system need essentially none of that.
When you account for replacement cycles, usable capacity, and maintenance, many households find the total cost of ownership favours lithium over a 10-year horizon — even though the day-one invoice is higher. Tubular still makes sense for tighter budgets or homes easing into solar in phases.
We size and quote both options during every audit, so you can compare the real numbers for your specific load before deciding.