What do you think of these panels?

Fe-Wood

I am looking at these panels- Sharp # ND-224UC9BX

They are B grade and I am wondering if they are suitable for charging a 24v battery bank.

Here are the stats.

Model Number ND-224UC9BX
STC Rating 224.0
PTC Rating 197.6
Open Circuit Voltage (V) 36.6
Short Circuit Current (A) 8.33
Frame Color Silver
Origin USA
Power % ± -5/10
(W/ft²) 12.77
Area (ft²) 17.9
Weight (lbs) 44.1
Length (in) 64.60
Width (in) 39.10
Height (in) 1.80

BB.

Re: What do you think of these panels?

The Vmp is:

Maximum Power Voltage (Vpm): 28.9 Volts
Maximum Power Current (Ipm): 7.58 Amps

Vmp for a 24 volt bank should be around 35 to 37 volt ideally for a PWM controller (and minimum voltage requirement for a MPPT controller).

So, a single panel is not high enough voltage to reliably charge a 24 volt battery bank. You would need 2 to 3 panels in series with an MPPT controller to recharge a 24 volt battery bank.

-Bill