Goombah111
New Member
- Joined
- May 14, 2021
- Messages
- 73
Can I charge a 20ah SLA at 7a?
Gonna take that as a yes. YOLODepends
Okay I'll let these batteries become test subjects to this fast-charging until I take the plunge on these LiFePo4's.you will pay for it on the back end with a longer absorb period.
Im just gonna let my MPPT do it's thing and hope it doesn't explode. In full sun its gonna be 7a 24v with 2 sets of 2 batteries in parallel so will be exceeding the "initial current" rating by 1a."MAX 3.0 A" looks pretty clear to me. At least try to stay at the low end on voltage (14.5) if pressing the amps.
Im just gonna let my MPPT do it's thing and hope it doesn't explode.
I will keep that in mind, thanks for the tip.If you care about preserving it, set bulk/boost/absorption/float to 13.8V. At the lower voltages they can often take more than rated, but it will take a longer time to eventually fill. You might not get to true 100% charge in a solar day.
"I managed to get 4 of these for 40$ so I'm using it with 1 panel as a secondary 24v side-system."you didn't mention more than one
They all had the same voltage so i went with it. Heard bottom balancing is better.I would have personally charged each one up individually before assembling into a bank
Ive had em out there for only 4 days now, will continue to keep a close eye on them. Im obsessed with checking everything constantly when I get a new system, i get a weird enjoyment out of it. These are like my toys and I love playing with them.keep your ears open for rice-crispies that first time out,
Definitely. Trying to learn and upgrade as I go slowly incorporating more expensive and dangerous setups when I feel comfortable. One day i hope this hobby turns into a practical financial endeavor.appears to be a fun learning experience kind of thing,
"I managed to get 4 of these for 40$ so I'm using it with 1 panel as a secondary 24v side-system."
They all had the same voltage so i went with it. Heard bottom balancing is better.
Never said empty. Heard bottom balancing, especially LiFePo, is better but that doesnt mean empty, it means 3.2v per cell. In this case it'd be 2v per cell as SLA shouldnt be drained past 50%.You heard horrifyingly wrong. There's never a reason you actually want to take a lead-acid battery to empty. Ever.
Im constantly checking the voltages etc, will make sure it's good don't worry thanks for the concern.I second @Substrate 's recommendation to top charge all 4 individually or at least in parallel to peak voltage.
I got one of those iMax B6 chargers, I may do that at some point.Anyway, you spent only $40 on the batts, but do yourself a favor and grab one of the small $20 2A "trickle chargers" and charge each one up. Then go to town.
Mine is undoubtedly one of the fake ones but has served me well over the years. It is a little off on the voltage though, I'll give calibrating it a try.there are a lot of counterfeit iMax chargers. If so, you may be able to calibrate it: