I have put together a system without the tedium of using 18650 cells which for me was a hell of a lot of work.
I have used 8 LFP or LiFePo4 cells which are in alloy cases in a prismatic form and are readily available for under $1 an amphour plus postage or freight to you from china.
The system has been running well now for 18 months.
The nominal voltage for these is 3.2V and cutoffs are high 3.55V and low of 2V. The BMS is sealed and waterproof.
8 cells gives me 28.4V max and this runs a 24 V Inverter of 500 watts nicely.
I run my 55 inchTV and a light and my security lights at this time to prove the effectiveness and longevity .This approach is rapidly being installed by Boaters and RVers.
With everything turned on there is less than 7 amps at say 27V flowing into the inverter so I am using a quarter of its potential
I am charging it with two normal house panels of 260 watts and can run the TV 24 / 7 if the sun permits . The battery feeds the system for about 10 hours without charging.
I have used 8 LFP or LiFePo4 cells which are in alloy cases in a prismatic form and are readily available for under $1 an amphour plus postage or freight to you from china.
The system has been running well now for 18 months.
The nominal voltage for these is 3.2V and cutoffs are high 3.55V and low of 2V. The BMS is sealed and waterproof.
8 cells gives me 28.4V max and this runs a 24 V Inverter of 500 watts nicely.
I run my 55 inchTV and a light and my security lights at this time to prove the effectiveness and longevity .This approach is rapidly being installed by Boaters and RVers.
With everything turned on there is less than 7 amps at say 27V flowing into the inverter so I am using a quarter of its potential
I am charging it with two normal house panels of 260 watts and can run the TV 24 / 7 if the sun permits . The battery feeds the system for about 10 hours without charging.