We do offer a LiFePo battery option - read about it here - however these are still important points to consider.
“Why don’t these kits come with lithium batteries?”
That’s a question that we get asked all of the time. More specifically, why we continue to sell lead-acid batteries instead of lithium-ion in our kits. Without question, lithium-ion batteries do present some distinct advantages that other types of batteries don’t offer. However, they do have some shortcomings and disadvantages that differ from those of traditional lead-acid batteries.
Lithium-ion batteries have a lot of advantages when it comes to maintenance, energy density, and efficiency, but one of the biggest drawbacks to buying lithium-ion batteries right now is the price. Currently, in New Zealand, lithium-ion batteries cost roughly four times the amount of lead-acid batteries. You are going to get some notable differences in performance with a lithium-ion battery vs. a lead-acid, but the price difference is a very significant factor.
Lithium-ion batteries need added protection that lead-acid batteries don’t. They can be easily overcharged or discharged below a safe limit, which means you needed protective circuitry incorporated in your battery system. This is not only an added cost but an added complication as well. Our Lithium batteries do come with this advanced battery management system.
Another reason that we haven't fully converted is due to the fact that this is a technology that is still very new. Though lithium-ion batteries have been in popular use for years, much of the technology is still evolving, and we expect the price to drop as time goes on.. Lead-acid batteries are a mature and refined piece of technology that is reliable, well understood, and affordable.
Though we don’t currently provide lithium-ion batteries as standard in our kits, it is not something that we expect to avoid indefinitely. As technology improves and the cost of these batteries begin to level out, this is a product that we believe will be much more viable in our business, in the foreseeable future. For the time being, while lithium-ion batteries do have many distinct advantages over lead-acid, we don't believe this outweighs the current price difference, so will continue to use lead-acid batteries until lithium-ion becomes the superior option.