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Author Topic:   Battery Box
wbullwin posted 04-21-2013 06:24 PM ET (US)   Profile for wbullwin   Send Email to wbullwin  
Is there any reason not to use a battery box? I have been looking at a new boat, and under the seats in the stern is loads of storage. The batteries are also there, but not in boxes, just clamped to the floor. I'm thinking that if someone throws something in there and has any metal on it, it could hit the terminals and short out. I'm not sure why the manufacture wouldn't put them in boxes.
Hoosier posted 04-21-2013 09:10 PM ET (US)     Profile for Hoosier  Send Email to Hoosier     
As I understand it it's only the Positive Terminal that needs to be covered, so your lack of battery boxes may be OK as long as the terminals are covered.
jimh posted 04-21-2013 10:59 PM ET (US)     Profile for jimh  Send Email to jimh     
There are most likely recommendations from the ABYC and also regulations from the USCG about battery boxes. The battery box contains the battery so that any acid in the battery cannot spill. The battery box covers the electrical connections. These are both valuable functions of the battery box. If you have a sealed battery you might be able to forego the battery box to contain the acid. You still need to cover and protect the connections.
jimh posted 04-22-2013 08:31 AM ET (US)     Profile for jimh  Send Email to jimh     
The American Boat and Yacht Council says:


E-10.7.1 If the mounting surfaces of components of the boat in the immediate vicinity of the battery are of a material attacked by the electrolyte, a mounting means shall be provided that is made of material that is not damaged by electrolyte.

E-10.7.2 Provision shall be made to contain leakage and spillage of electrolyte.

E-10.7.3 Fasteners for the attachment of battery boxes or trays shall be isolated from areas intended to collect spilled electrolyte.

E-10.7.4 Each installed battery shall not move more than one inch (25mm) in any direction when a pulling force of 90 pounds (41kg) or twice the battery weight, whichever is less, is applied through the center of gravity of the battery as follows;

E- vertically for a duration of one minute, and

E- horizontally and parallel to the boat's centerline, for a duration of one minute fore and one minute aft, and

E- horizontally and perpendicular to the boat's centerline for a duration of one minute to starboard and one minute to port.

E-10.7.5 No battery shall be installed directly above or below a fuel tank, fuel filter, or fitting in a fuel line.

NOTE: This does not prohibit a battery from being installed directly above or below an uninterrupted fuel line. However, if a metallic fuel line is within the 12 inch (305mm) envelope of the surface of the battery, it shall be shielded dielectrically as required in E-10.7.8.

E-10.7.6 Batteries shall not be installed directly below battery chargers or inverters.

E-10.7.7 To prevent accidental contact of the ungrounded battery connection to ground, each battery shall be protected so that metallic objects cannot come into contact with the ungrounded battery terminal and uninsulated cell straps. This may be accomplished by means such as;

E- covering the ungrounded battery terminal with a boot or non-conductive shield, or

E- installing the battery in a covered battery box, or

E- installing the battery in a compartment specially designed only for the battery(s).

E-10.7.8 Top Terminal Battery - Each metallic fuel line and fuel system component within 12 inches (305mm) of a battery terminal, and above the horizontal plane of the battery top surface, as installed, shall be shielded with dielectric material to protect against accidental short-circuiting. See Figure 1.

E-10.7.9 Side Terminal Battery - Each metallic fuel line and fuel system component within 12 inches (305mm) of the terminal side of a side terminal battery shall be shielded with a dielectric material to protect against accidental short circuiting. If the battery has side terminals, the horizontal plane shall be considered to begin below the side terminals. See Figure 1.


1. Terminal insulation or battery covers do not comply with this requirement since, during installation or removal of a battery, these protective devices are usually removed in order to connect the cables.

2. Any non-conductive material may be used for shielding as long as it is durable enough to withstand accidental contact by a tool or the battery terminals during servicing, installation or removal.

E-10.7.10 A vent system or other means shall be provided to permit the discharge from the boat of hydrogen gas released by the battery. See ABYC H-2, Ventilation Of Boats Using Gasoline.

E-10.7.11 Battery boxes, whose cover forms a pocket over the battery, shall be vented at the uppermost portion of the cover.

NOTE TO E-10.7.10 and E-10.7.11: These requirements also apply to installations of all batteries whether they employ removable vent caps, non-removable caps, are "sealed" or "maintenance free" batteries, or have pressure regulated valve vent systems with immobilized electrolyte (gel batteries).

E-10.7.12 Batteries shall be charged by means of an automatically controlled device, that is capable of supplying the current and voltage appropriate to the type of battery being charged. See ABYC A-20, Battery Chargers, and ABYC A-25, Power Inverters.

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