diy solar

diy solar

LFP charging parameters

Finca Life

New Member
Joined
Oct 5, 2022
Messages
54
Location
Murcia, Spain
To cut a long story very short, can I charge a 12v 100Ah Lfp battery with a pwm charger? The battery has it's own bms . The system is for a friend and I have both pwm and mppt chargers available. The pwm is a Must 80A 12/24 volt and the mppt is an Epever 8145. The Must pwm is much smaller and more practical (and a lot cheaper) to install in a camper van but will it do the job? The solar panel is 24V 200W. TIA
 
Thank you and explained very clearly. The Epever it is :)

to clarify...

12V and 24V solar panel terminology is a throw pack to PWM and pre-PWM days. Basically, it's the size panel needed to charge that voltage battery.

12V panels have 36 cells and are around Vmp 18-20 and Voc 20-24
24V panels have 72 cells and are around Vmp 36-40 and Voc 40-48

If the 200W panel has a Voc of around 24V... it's a 12V panel... :)
 
to clarify...

12V and 24V solar panel terminology is a throw pack to PWM and pre-PWM days. Basically, it's the size panel needed to charge that voltage battery.

12V panels have 36 cells and are around Vmp 18-20 and Voc 20-24
24V panels have 72 cells and are around Vmp 36-40 and Voc 40-48

If the 200W panel has a Voc of around 24V... it's a 12V panel... :)
Brilliant and thanks again. So, if it's a 12 volt panel (which I now suspect it is - I haven't seen it yet lol) I am ok to use the pwm?
 
The pwm is a Must 80A 12/24 volt and the mppt is an Epever 8145. The Must pwm is much smaller and more practical (and a lot cheaper) to install in a camper van but will it do the job? The solar panel is 24V 200W.

Are we talking about 80A controllers for a single 200w panel? I assume 8145 is a typo for 8415.

So, if it's a 12 volt panel (which I now suspect it is - I haven't seen it yet lol) I am ok to use the pwm?

I'd try it to see if it's sufficient. If so, money and space saved. If it's unable to keep up a 20A MPPT would be appropriate for 200w of panel on a 12v battery bank.
 
Back
Top