Charles Francis Speakman
Member
- Joined
- May 6, 2017
- Messages
- 60
This may have been covered elsewhere, but how low of a voltage is it safe for your battery pack to get before you allow it to recharge?
My setup is 14s100p, charged from daylight to dusk with PCM60X mppt solar charger. Have a Schneider Conext SW4048 Inverter that can be used on or off grid. From daylight until dusk have turned OFF the AC grid support, and turn the AC grid support ON between 10 and 11 pm. Electricity is crazy cheap, like $0.015 per kWh between 11 pm and 7 am, so prefer NOT to allow battery pack charging from the grid except after 11 pm. Problem is that must physically flip a breaker switch to turn AC support ON or OFF.
Today was a cloudy day, and battery pack did not fully charge, so am running lowest pack at 3.4 v and highest pack around 3.6 volts right now...so how low can it go before it just shuts off? The cellmon setting in Batrium is set at low voltage of 2.90 volts, and this appears to be the default, as I have not changed it. So will it continue to discharge down to 2.9 v, and is that safe, or WAY too low.
Been watching it go down, and lights still on, but when should I pull the trigger and flip the switch??? Or should I just keep watching one night and see where it is when the lights turn off???
Very nice video. Got mine built and powering it with 12 volt computer power supply. Currently charging one of my lower voltage packs on the bench. Have it set to charge at 4.20 volts and 10 amps. Question is how long to charge, and is it safe just to let it run all night? Will it stop once the pack gets to the 4.20 volt level, and then stop? Or should I set it at 4.15 volts???
My setup is 14s100p, charged from daylight to dusk with PCM60X mppt solar charger. Have a Schneider Conext SW4048 Inverter that can be used on or off grid. From daylight until dusk have turned OFF the AC grid support, and turn the AC grid support ON between 10 and 11 pm. Electricity is crazy cheap, like $0.015 per kWh between 11 pm and 7 am, so prefer NOT to allow battery pack charging from the grid except after 11 pm. Problem is that must physically flip a breaker switch to turn AC support ON or OFF.
Today was a cloudy day, and battery pack did not fully charge, so am running lowest pack at 3.4 v and highest pack around 3.6 volts right now...so how low can it go before it just shuts off? The cellmon setting in Batrium is set at low voltage of 2.90 volts, and this appears to be the default, as I have not changed it. So will it continue to discharge down to 2.9 v, and is that safe, or WAY too low.
Been watching it go down, and lights still on, but when should I pull the trigger and flip the switch??? Or should I just keep watching one night and see where it is when the lights turn off???
daromer said:Ah that click. Can you pull them out again? If not... then they are in there
With a computer power supply you can power a DPS unit. They are killer things! They have a 20A unit that just is awesome! I did a video about it just days ago too if you check that out!
Very nice video. Got mine built and powering it with 12 volt computer power supply. Currently charging one of my lower voltage packs on the bench. Have it set to charge at 4.20 volts and 10 amps. Question is how long to charge, and is it safe just to let it run all night? Will it stop once the pack gets to the 4.20 volt level, and then stop? Or should I set it at 4.15 volts???