Thanks for the comment and for taking the time to watch the video. Changing the battery in the Goal Zero Yeti isn't terribly difficult, but seeing as how the battery is nearly 100 pounds it will give some people some problems. I can change the battery in as little as 20 minutes.
I looked at the weights and costs of several options for 20W+ for HF SOTA/POTA including the 857D, KX3 plus amp and tuner, Icom 7100, etc. Since I already owned the 7300 and it will tune up to 3:1...or better in emergency mode (reduces power to 50W or less), it was an easy decision. I don't have to carry the 939, the LNR end fed quad does very well on 10, 15, 20, 40 with the 7300 internal tuner. If I were to pack into a site instead of driving to the proximity and then short hiking...I'd get an external backpack frame and mount the radio bag to it, with tent and camping gear below. Both ALPS and Eberlestock make very nice external frame packs. I like Eberlestock because they have a wide variety of modular systems you can tailor to your hunt...be you hunting DX or critters. My next purchase from Bioenno will be their 28 watt solar panels and low noise charge controller.
As one of their FIRST ham radio op to purchase their battery, I can close my eyes and recommend their batteries. They battery I bought so long ago still outperforms any battery I have ever purchased. The lightweight 12Ah version has powered my 857D portable rig without issue for a few years. http://k4ecd.com/cq/k4ecd-portable-equipment/ One of the best companies around.
This will sound like a dumb question--but can you run the panels AND the battery at the same time? I was told by someone at HRO that you can't transmit off the battery with the panel charging it. So what then--use two batteries and switch back and forth?
Using the setup I posted earlier thats not a issue, battery just keeps getting topped off as you discharge it, the controller in fact keeps track of amps used and amps put back as well as charge amps ...
Legit question. I don't know. Please ask Kevin and let us know. I asked about doing that with the charger and here's their reply: From: Bioenno Power <sale@bioennopower.com> Sent: Sunday, June 3, 2018 11:45 PM Subject: Re: Website Inquiry Yes, that's fine. Kevin Bioenno Power kevin.zanjani@bioennopower.com Direct +1 714 336 2953 On 6/3/2018 5:02 PM, you wrote: Hi, May I charge my 20ah, 12v LiFePo with the 4A wall charger at the same time that I’m using the battery to power a transceiver?
At (-) 4F it looks like LiFePo is down to about 70%. If you apply a resistive load and warm it up gently, the outside air temperature won't have as great an effect. Lead acid appears to do worse...but read the links and draw your own conclusions. https://uwspace.uwaterloo.ca/bitstream/handle/10012/7350/Lo_Joshua.pdf?sequence=1 https://www.batterystuff.com/kb/art...sport-batteries-cold-weather-performance.html https://relionbattery.com/blog/lithium-battery-cold-weather https://en.wikipedia.org/wiki/Lithium_iron_phosphate_battery