Solar Battery Energy Capacity: 1592 Wh

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Because the solar cells experience regular voltage sags daily, primarily because of cloud cover diminishing or interrupting power collection, the battery also acts as a buffer to provide reserve energy when needed.

If our solar cells operate at 100% of their capability for 10 hours a day, with no clouds to interfere with collection, we can collect an additional 1990 Wh per day above and beyond what the PC consumes (10 hours x (260 Watts – 61 Watts for PC) = 1990 Wh) for storage.

After factoring out the 20% power loss from the battery itself, this produces a usable capacity of 1592 Wh. This means our battery, which has a rated capacity of 1560 Wh is perfectly sized to handle excess collection without losing appreciable energy.

But of course, these are gross totals, which fail to take power losses from other components into account.

A fuse on the battery protects components from short circuits.

Because a lead acid battery of this capacity can produce extreme power spikes, we must protect all attached devices with fuses.

A wall-socket is a no-no for this PC: our first attempt at computing independent from the power grid.


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