engine management system drawing power, the charger
can identify that as a load and will stay in boost mode for
the entire set period, which can put too much energy into
“You can see this in your car battery if you attach it to a
charger,” he said. “If you don’t watch it, you’ll hear the bat-
tery boiling. That happens frequently with gen-set batter-
ies because they stay in the boost mode for too long.”
By automatically adapting to each individual gen-set,
battery capacity, dc load, and battery state of charge, the
MicroGenius 150 charger operates without the risk of over-
charge damage, Kaewert said.
“Because it has a microprocessor, it can take all those
measurements and determine each and every time how
much energy you need to put back into the battery,” he said.
Kaewert said the charger is so efficient, the 6.0 Amp rated
MicroGenius 150 can more completely charge a starting battery than units rated 10 Amps.
He also said the unit, which is designed for emergency generators, complies with new California Energy
Commission rules on battery charging systems. Those
rules, which went into effect last year, cover devices from
cell phones and electric razors to golf carts and forklifts.
Industrial chargers are required to meet the standards
beginning in 2017.
Kaewert said National Fire Protection Association (NFPA)
rules require that a gen-set inform the operator of charger
voltage and current, along with starting battery alarm state.
This meant that the charger had to be installed so that
meters are visible, he said, and that alarm wires needed to
be run to multiple signal relays. The MicroGenius 150 charger
has an optional J1939 communications port that enables
gen-set controller access to NFPA-required alarm and meter
data through a two-wire connection. This allows the
charger to be located anywhere in the gen-set system, which
can simplify installation and reduce cost, he said.
MicroGenius 150 offers field-selectable 12 or 24 V output
voltages and accepts any ac source from 90 to 265 V, 50
or 60 Hz. Chargers can be configured with or without an
optional accessory board that contains an LCD display,
Form C alarm contacts and a J1939 CANbus communications interface.
The charger is packaged in a weather-resistant enclosure constructed of IP22 powder coated aluminum. Open
frame units are available for manufacturers and packagers
looking to embed the charger in a larger housing.
The enclosed version weighs 3 lb., while the open frame
model is 2. 3 lb. It can operate in temperatures from - 4° to
122°F at full output and withstand temperatures from - 40° to
158 °F at reduced output.
Production quantities will be available in the first quarter,
with evaluation units available now. dp
January 2014 DIESEL PROGRESS NORTH AMERICAN EDITION 55
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Smallest 6 GPM Check Valve Ever!
• Save Space – Most Compact
Design in its Class
• Low Leakage Metal-to-Metal Seat
• 100% Performance Tested
• Easy to Install
Innovation in Miniature The Lee Company
2 Pettipaug Road
Westbrook, C T 06498 USA
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