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I decided to finally build a dual stage swampcooler (also known as indirect swampcooler) , I tested the concept of building one 2 years ago but it was too large/impractical for my van, but it did produce good results during testing. The only difference between a regular swampcooler and a dual...

I recently upgraded my astrovans solar system, I replaced the sharp 240 watt panel with a LG 365 watt panel. With the 240 watt panel in winter (southern california) I was getting a max of about 9 amps charging a 4s lifepo4, and 10 amps charging a 3s li-ion battery pack. With the new 365 watt...

I had problems with my 4s20p 110ah  lifepo4 battery pack not getting a full charge due to the BMS always tripping early due to one cell always reaching 3.65 volts while the other 3 cells where at 3.40 volts, this has been going on for 6 months. When the BMS tripped, the solar charge controller...

TK15 High Precision LiFePO/Lithium/Lead Acid Battery Tester Coulomb Counter 50A Lifepo4 battery reads about the same voltage 13.1 volts whether it's 20 percent full or 80 percent full, making it difficult to figure out what the remaining capacity is by just using the voltage as a guideline. I...

Recently I decided to build my own lifepo4 battery. I bought the 80 x lifepo4 cylindrical 5.5 mah cells. When put together as a 4s 12.8 battery pack it would be 110 ah battery pack. My original plan was to solder all the cells together like I usually do with laptop cells but the solder wasn't...