solar powered ham station presented by jim erickson kb0dbj
TRANSCRIPT
Solar Powered Ham Station
Presented by Jim EricksonKB0DBJ
Reasons to run Solar PowerSelf SufficiencySave Money on electric billDon’t need expensive power
supplyClean, Quiet PowerEquipment lasts longer, runs
coolerChallengeIdeal for remote locationsSince power is at a premium,
teaches efficient use of antennas
Negatives of a Solar Station
Not practical for high power or heavy duty cycle
Equipment can be expensiveRequires a large storage systemVoltage drops at night & cloudy
days
Components of a Solar Station:
Solar PanelControllerStorage system (battery or
batteries)
Types of Panels:MonosiliconPolysiliconAmorphous
Most efficientWorks well in low lightMost expensiveHardest to findTake most roomLong Life
Monosilicon:
Polysilicon:Fairly commonAffordableStill very efficientWorks well in low lightLong Life (25 yrs)Take Less room
Amorphous:CheapEasy to findCan be
flexibleDon’t last
longNot
efficientHave
grayish appearance
Types of Batteries:Lithium basedAGM/gelAuto startingMarine
Lithium based
Very expensiveNot tolerant to abuse, such as: overcharging, extreme temps & mishandling Excellent power density (weight to
power ratio) Excellent power curveExtreme drop off Don’t recommend unless you need to
be VERY portable.
AGM/GellGood float voltageGood power curveModerately
tolerant of abuse.Can use inside.Easy to obtain,
especially surplus.Deep cycle
models available. Heavy
Auto StartingDecent float voltage
(13v)Easy to getShould not use
inside (vents hydrogen gas)
Tolerant to abuseCannot deep cycle Decent power curve,
do not discharge past 90%
Marine BatteryLower float
voltageDeep cycleCan be abusedEasy to getShouldn’t use
insideSteep power
curve, voltage drops rapidly
Really designed for resistive loads
Controller:
Prevents overchargingUses full potential of
panelProvides pulse charge
when fully charged to prevent sulfating
Other thoughts
It’s a good idea to have a voltmeter to monitor voltageStart you system small & enlarge as you goAn inverter can be added to power small 110v items
How big of a system do I need ?
The simple answer is: enough to cover you needs. You will find that as you use your system, you will want to grow it to cover other power needs. Mine started out as 10 watt panel with a18 ah battery.
Now it’s a 20 watt panel with a 90 ah battery, powering 3 VHF/UHF radios & a Kenwood TS-50 HF rig.
THE END