Shoehorn has a relatively modest engine – a 35hp, three cylinder Barrus Shire – but one that is perfectly adequate for its size and location. The batteries – one engine start battery and three deep cycle 135aH leisure batteries – are located on the aft portside locker.
Though Shoehorn is a live-aboard, the original owner was very energy conscious, therefore did not have a large power requirement. The engine has twin alternators, a 110amp unit to charge the domestic battery bank, and a 70amp unit for the engine and bow thruster batteries. A Sterling four step 20amp charger is used, as well as a Sterling 1800w inverter for 230v AC supply.
There is also switchable shore power, and the high demand washer/drier is wired to this circuit only. As well as the multi-fuel stove, there is Webasto central heating system, with radiators in the saloon and cabin, plus a heated towel rail in the bathroom.