Off grid and SOTA, solar power

[DK3IT]

My DC/DC boost converter

DC-DC Step-Up Converter with Filters for MTR and other QRP Rigs

Hi all, Mountain Toppers and other popular QRP rigs need 12 V DC to produce full 5 W output. Most people either use combination of cells (e.g. 8 x 1.5 V batteries, 10 x 1.2 V NiMH cells, 2 - 3 LiPo cells, etc.) for this purpose. This has two problems, however: Because the cell voltage has quite a range during the discharge cycle, you have to factor in some safety buffer for fully charged cells and their higher voltage (e.g. 3 x Lipo can have 3 x 4.3 → 12.9 and more when fully charged). Y…

should also work from the 5V output of most USB power-banks, which in turn can be conveniently charged from many modest solar panels.

I got one from Anker but don’t have the model number at hand.

73 de Martin, DK3IT