Xantrex Link 2000 Manuel d'utilisateur télécharger pdf (Page 28)

Surrette and Rolls Batteries

Model Volts Res. Min. 20-Hr. Rating "n"

EHG-208 6 345 208 1.42

EIG-225 6 350 225 1.54*

EIG-262 6 395 262 1.72*

24/90 12 165 90 1.16

27/12M 12 190 112 1.23

30H/108 12 230 108 1.08

HT/4D 12 348 170 1.15

HT/8D 12 450 221 1.20

*Use Max allowed "n" of 1.50

TYPICAL PEUKERT'S EXPONENTS

log t

- log t

log I

- log I

n =

log 20

- log 7.45

log 25

- log 11.25

1.301

- 0.872

1.398

- 1.051

= 1.24

CALCULATING PEUKERT'S EXPONENT

Example of using Reserve Minutes @ 25 amps

and the 20-hour rate to calculate "n".

First convert Reserve Minutes to hours, then find the discharge current

at the 20-hour rating. Finally use a calculator to solve the arithmetic.

Trojan T-105:

Reserve Minutes = 447 min @ 25 amps.

= 447 min = 447/60 = 7.45 hrs

= 25 amps

20-Hour rating = 225 Ah

= 20 hours

= 225 amp hours/20 hours = 11.25 amps

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Xantrex Link 2000 Manuel d'utilisateur Page 28