Changes

For the [[HouseBank|house bank]], although traction batteries are sometimes used, what we really need is a true [https://en.wikipedia.org/wiki/Deep_cycle_battery deep-discharge] (DD) battery. Unlike an SLI, a DD provides high levels of current for a long period, and re-charges very quickly. Traction batteries have a slightly lower cost, but overall efficiency and performance will be better with DD batteries.

* Fuse the [[HouseBank|house bank]] internally as well as externally. This will keep a battery gone bad from shorting and discharging the entire bank. Some batteries are built so you can replace individual cells.