Shorai battery size?

[sofadriver]

I'm planning to use a 12v Shorai battery to power my bike's water pump, digital exhaust temp. gauge and possibly a digital tach. It will be a total loss system. The little pump uses 1.7 amps.
Assuming I run it 20 times for 5 minutes, what battery rating do you figure I'll need?

[revolutionary]

assuming the others bring the total draw to 2 amps

20 x 5 = 100 minutes = 1.67 hours

2*1.67 = 3.34 amp hour rating

That will allow you to draw 2 amps over 1.67 hours at which point the battery should reach the point of needing to be recharged (~10.5v). Knowing that batteries tend to lose some of their gusto after being charged over an over again, I would double that at least. You can pick up some nice 12v 10 ah batteries for cheap.

[sofadriver]

Excellent. Thanks, Rev.

[Stainless1]

Bring a charger... the salt will help drain your battery power, you can always find some power if you don't bring some.  Small HF generators can be had for a $100 or less.  Put the largest battery on the bike that you have room for.

[bak189]

IF you plan on using a Shorai battery (we were sponsored by Shoria on our LSR sidecar) they are truly outstanding (not cheap to buy) when fully charged they will last a very long time......we were running the engine, fuel pump, electric shifter, on total loss........we ran the whole week without a charge at the BUB event, with 2 runs a day..........they will not loose a charge when sitting parked.......our sidecar is going to the National Motorcycle Museum and has been sitting in the shop for the last 10 months......10 months ago after the last run, I charged it up....it showed 13 volts when charged..............today it showed 13 volts.
However, it should be noted that it is best to use their special charger............................no low price battery....but certainly a outstanding product.................................................................................
 

[bak189]

One thing more.........................the Shoriai can be mounted in ANY position..................

[racefanwfo]

you can get a charger from Shorai for there batterys.

Shorai Charge and Store Battery Management System which includes STORE MODE for maximum battery life during long-term storage, CHARGE MODE charges, balances, and performs cell diagnostics.  Also features a retractable hook to hang from grips, frame rails, or seat straps.  Operating Specifications: 100V~250V 50/60 Hz AC Input; 2A max charge rate.


While standard lead-acid chargers can be used with Shorai LFX when needed, the BMS01 is specifically designed to charge, store, maintain, balance, and diagnose your LFX battery.

msrp for the charger is $84.95

SHORAI INC.
845 STEWART DR., SUITE D
SUNNYVALE, CA 94085

 

TOLL FREE: 888-477-4848
TEL: 408-720-8821
FAX: 408-720-1537

Business hours: M~F 8:30 a.m. to 5:30 p.m. PST

[manta22]

I'm not familiar with a Shorai battery but if it is an AGM type, I wouldn't recommend using an ordinary battery charger on it. AGMs are somewhat different and can be damaged by incorrect charging.

Regards, Neil  Tucson, AZ