It’s finally done, my big ‘ol suitcase full of lithium batteries, inverter, and charge controller.
The specifications are:
-100w PV array
-0.75kWh lithium battery storage
-300w pure sine inverter
-Volt meter showing 3 decimal places (28 = full, 20 = dead)
-SunSaver MPPT charge controller
-Internal circuit breaker and power switch
Let’s take a closer look:
The 100w array opens up and has built in tilt legs, made by Renogy. I re-wired this nice pre-built portable solar array from parallel to series as this project is a 24v system.
The solar suitcase contains the batteries and electronics and can be shaded by the solar array.
120vac outlet for anything 300w and under.
Easily monitor battery capacity and because of the 3 decimal places easily see how fast charging or discharging is taking place.
Simple DC banana jack for connecting PV array
The fun stuff! At the top of the image you see 3 paralleled 0.250kWh 24v lithium batteries in parallel. There is a circuit breaker and power switch. To the right is the pure sine 300w inverter, and at the bottom is the charge controller.
This replaces my previous build of a self contained power system, which because of the lead batteries didn’t have much capacity and weighed too much (see project here). This project was inspired by a portable power supply I built in my teens which also had lead acid in it (see project here)…this suitcase is actually the same exact one given a second life!