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recommend them. With isolated negative output alternators, remember that instrumentation
and other loads grounded directly to the engine block will not be measured unless their
negatives are relocated to the load side of the Battery Shunt.
Special high current shunts are really the right solution and may be ordered from
Xantrex Technology Inc. A separate engine starting battery whose negative is connected
directly to the engine also solves the problem. The Xantrex Technology heavy duty shunt
is Part Number 84-2013-00.
6) We have shown several wires connected to the load side of the battery shunt in the wiring
diagram. If more than a few wires must be connected here, it is best to use a 2/0 jumper
from the shunt to a good negative bus. We recommend that no more than two, or at a
maximum three, connections per large bolt be made on the negative bus side of the shunt.
The negative bus should be a solid copper or brass bar with many threaded screws under
which the negatives for all of the loads may be secured. It should be fed with a conductor
of sufficient size so that there is no appreciable voltage drop even under full load.
7) We are frequently asked about battery isolators. We don't recommend them. The reason
is that battery isolators have a noticeable voltage drop across them which may be greater
than 0.5 V. In most instances, a better solution is to use a battery combiner which keeps
a starting battery charged without a voltage drop.