Hallberg-Rassy KEWA, Руководство пользователя

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KEWA Manual © Copyright 2016 Page: 56
56
The principal charging method at and away from the dock is the chargers unless, of
course, we are motoring. The two chargers are controlled by breakers in the aft
passageway AC panel – one each for 24v and 12v. The 24v breaker allows the 230v
Magnum control panel to then start, stop and change charging parameters for the 24v
house bank. The 12v breaker simply turns on/off the dedicated 12v charger, which
charges the 12v house bank and the 12v aux battery via two charging outputs.
The Magnum control panel allows limits on the amperage drawn. Under Setup / 03
Charger setup, the AC Input Amps can be adjusted. I presently have it at 12a which puts
a maximum of about 70amp into the 24v house if it is depleted.
Note: As of 8/3/2017, during peak solar time, when, depending on the state of the
battery, the solar panels may be achieving at or above 25.6v, the Magnum won’t charge.
Removing the yellow auto fuse in the fuse holder under the solar panel kill the solar input
and allows the Magnum system to not get confused due to high voltage as to the battery
state, enabling the Magnum to properly and fully charge the batteries.
When charging the batteries at anchor via the high-output alternators on the Yanmar
auxiliary engine, I run the engine at about 1200 RPM, which provides about 90A to a
discharged battery bank.
Charging Details
AGM batteries require a different and more carefully controlled charging process than
traditional open-cell lead acid batteries. To accommodate this requirement, a new 12v
Balmar alternator with external three-stage regulator was installed to replace the original
Hitachi alternator with its internal single-stage regulator.
The single stage 12v alternator and regulator on the genset are designed to charge a start
battery but ramps up to about 15v. This is a little high for AGM batteries. The regulator
and alternator may be disconnected entirely, and the Echo Charger will then charge the
12v start battery when the 12v battery charger is turned on. The Echo Charger, however,
drives too low a voltage and very little current to the second (starter) battery. If the
genset alternator and regulator are disconnected, the genset would then utilize the start
battery to operate and thus would drain it slightly (about 0.1 to 0.3a) during operation,
unless, as would normally be the case, the 12v charger is turned on while the genset is
running.
Lifeline Battery Charging Guidelines per Lifeline Documentation
Bulk/Absorb 14.2 – 14.4 (28.4 – 28.8)
Float
13.2 – 13.4 (26.4 – 26.8)
(at 77ºF +/- 10ºF)
Discover AGM Charging per Discover documentation
@ 77 degrees F: CHARGE = 14.20v to 14.72v (std to max)
Commented [WK7]:
Check – I think changed to 100a
Commented [WK8]:
Make this a task to change
Commented [WK9]:
Is this still current?