I use a Genasun GV-5 and a Bioenno Power 4.5 Ah LiFePO4 battery to power
my KX2. I agree with Jim. These components work great together--but
with one exception: I can't float the battery with the GV-5. When the
battery approaches full charge, its internal monitoring disconnects the
battery from the circuit, causing the GV-5 to go to open circuit voltage
of >= 18 V in full sunlight. According to Elecraft, this would fry my
radio. So, as a work around, I use a DPDT switch to keep the solar
panel and the load on separate circuits, selectively connecting one or
the other to the controller. This way, when the panel is connected and
the controller signals an over voltage error (according to Bioenno, this
doesn't harm the battery), I know that my battery is fully charged. I
then disconnect the panel and connect the load by flipping the switch.
I don't mean to hijack Harry's thread--hopefully this post adds value
for him. But I wonder if there is any other combination of small,
lightweight MPPT controller and LiFePO4 battery that would permit
floating the battery.
On 3/17/2017 9:16 AM, [email protected] wrote:
Message: 15
Date: Thu, 16 Mar 2017 21:48:53 -0700
From: Jim Brown<[email protected]>
To:[email protected]
Subject: Re: [Elecraft] Who sells a small RF quiet solar charge
controller?
Message-ID:
<[email protected]>
Content-Type: text/plain; charset=windows-1252; format=flowed
On Thu,3/16/2017 6:11 PM, Harry Yingst via Elecraft wrote:
I'm looking for a small RF quiet solar charge controller to charge a battery
for my K2.
Genesun, Genasun, Genasun. They work very well and they are quiet. Make
sure you get the right model for the battery chemistry you're using.
They make models for lead acid, LiPO4, and Li Ion.
73, Jim K9YC
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