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Installation
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DC Components
Batteries
The MS2000 can be installed to operate with two different battery systems—a
house battery and an engine battery. Each system may be a single battery or a
bank of several batteries connected in series, parallel, or series-parallel.
House battery The house battery is the large capacity, deep cycle battery that is connected to the
inverter/charger’s main DC terminals. The MS2000 requires the house battery to
provide the DC current that the inverter converts to AC power. The house battery
is a 12 volt, lead-acid deep-cycle battery or group of batteries, all of a flooded, gel,
or AGM type.
Engine battery The engine battery is the battery connected to the Echo Charger output. Typically,
this will be an engine starting battery or an auxiliary battery for loads other than
the inverter.
For general information about batteries, see “Battery Information” on page 40.
For detailed information about specific brands of batteries, you’ll need to consult
individual battery manufacturers.
DC Disconnects and Over-Current Devices
The DC circuit from each battery to the inverter/charger must be equipped with a
disconnect and over-current protection device. (Refer to your applicable
installation code.) This usually consists of a circuit breaker, a “fused-disconnect,”
or a separate fuse and DC disconnect. Do not confuse AC circuit breakers with
DC circuit breakers. They are not interchangeable. The rating of the fuse or
breaker must be matched to the size of cables used in accordance with the
applicable installation codes. The breaker or fuse and disconnect should be
located as close as possible to the battery in the positive cable. Applicable codes
may limit how far the protection can be from the battery. For recommended fuse
sizes, see Table 2 on page 12.
DC Cabling
DC cabling includes all of the cables and connectors between the batteries, the DC
disconnect and over-current protection device, and the inverter/charger. All
installations require multi-strand insulated cables as well as disconnect and over-
current devices. DC cable sizes are indicated by AWG notation. Under the AWG
standard, a larger gauge number indicates a smaller size diameter. Wire size is
usually marked on the cables.
See Table 2 for required DC cable size and required fuse size for the MS2000.
The DC cables must be copper and must be rated 90 °C minimum.
Important:
Avoid excessive cable lengths to ensure optimum system
performance.