So, you have in hand the Prepper 20 Watt SSB/CW transceiver and 12V, 10 Amp LiPo battery. Now you need a charging system for the battery. I turned to Copilot and specified a location and typical operation.
When sizing a charging system you have to know stuff. So, before you simply rush in and flash the plastic first flash the brain. Things you have to know include the load (20 Watts PEP with a 50% duty cycle), how much you will operate on a daily basis (1 hour per day) and your location.
The location is a key factor like Yuma; AZ has 4000 hours of sunlight a year which is more than 10 hours a day every day. Port Townsend in WA, I swore had 4000 hours of rain a year. Location also plays a part in the tilt angle that you set the panels to garner the most energy generation. Solar panels are terribly inefficient like maybe 20% so every bit counts. Panel direction is also paramount. Find your old Cub Scout Compass and face the panels SOUTH.
In a apocalyptic scenario operating times may be limited but you also want the system sized so you get more than 15 minutes per day. You also must figure in the charging of phones and laptops.
Realistically I invoked the Chu Lai standard: MRE's, no lights at night and warm beer. Thus a 10 Amp battery was OK. You might think about building a crystal set as no power is required and you can run that 24/7 without batteries.
In my system I have included a small inverter to intermittently power devices that need 115V AC but no more than 70 watts. The inverter is good for 150 watts and has a single outlet and a USB charging port... get an adapter for USB B to USB C.
The answer was astonishing and the price was less than $50.
🌄 Best Specific Model for POTA/SOTA
Why this is the right choice for portable ham ops:
🏕️ Field‑Ready for POTA/SOTA
• 30W panel is the ideal size for backpack/portable ops — enough to recharge your 12 V 10 Ah LiPo after a day of SSB activity without being bulky.
• Lightweight and compact, easy to strap to a pack or deploy on a summit.
• Weather‑resistant for coastal or mountain environments.
🔋 Perfect Match for Your Load
Your 20 W SSB radio uses:
• 4A peak, 50% duty, 1 hour/day → 2Ah/day (≈24Wh/day)
A 30W panel in SoCal coastal sun produces:
Even derated, that’s 5–6× your daily consumption, giving:
• Fast battery recovery
• Margin for fog, shade, or short winter days
• Ability to operate longer if needed
⚡ Controller Included
• Comes with a charge controller suitable for 12 V LiFePO₄/LiPo systems.
• Protects your pack from overcharge and keeps things simple in the field.
🧰 Practical Advantages
• Works great with Powerpole adapters or ring terminals.
• Easy to mount on a tripod, lean against a rock, or lash to a pack.
• Affordable and widely used by portable operators.
10 Amp Battery and Inverter
For my location I point it South and set the tilt angle to 35 Degrees.
My actual radio is a KX3 @ 15 watts so the system will be loafing along.
This brings up another key point and that is the radio power output level. The siren's song is the $250 Xiegu or a Usdx. That is like the blonde with fake boobs. Nice looking but still not full bodied. The minimum power is 15 watts with 20 watts a better choice. Likely in the apocalyptic scenario the hex beam didn't survive the negative peak air overpressure, and you have a wire in a stump. You will need a bit more than 5 watts to be heard with a wimp of an antenna.
Them that know... survive.
73's
Pete N6QW











