Efficiency Problem

I installed three 300W Solar panels in parallel With the following electrical ratings for each
Vmp= 36 V
Imp= 8.33A
Voc=43.2
Isc=9.85A
with PWM Charge Controller to Charge two 12V 200A Batteries in Series.
Does (Vpm=36V) Mean that I need to add one more battery to the system to gain the optimum output current
if So will an MPPT charge controller solve my problem without the need to add one more battery and replace my 24V inverter ?
Thanks
Vmp= 36 V
Imp= 8.33A
Voc=43.2
Isc=9.85A
with PWM Charge Controller to Charge two 12V 200A Batteries in Series.
Does (Vpm=36V) Mean that I need to add one more battery to the system to gain the optimum output current
if So will an MPPT charge controller solve my problem without the need to add one more battery and replace my 24V inverter ?
Thanks

Comments
Some of us use MPPT controllers because of the distance between our best PV panel location and the CC and batteries. For example, our PV is 325 feet of wire distant. Using higher voltages from the PV in series saved money on wire size.
currently I am getting 24Ah Max instead of 900/24=37.5Ah (At solar noon)
its like I am wasting 1/3 of the panels power
I mean will an MPPT CC make that big different?
You asked about MPPT vs PWM controllers. You would probably gain a bit with an MPPT controller, especially in the winter. Whether the increase in harvest is worth the cost depends on many factors.
--vtMaps
Does the present CC have capacity to handle more panels? If you needed more charge power that could be cheaper than a new MPPT CC.
How long has the system been in operation? Have you been through a winter, the time of least PV power?
- Assorted other systems, pieces and to many panels in the closet to not do more projects.
The Math for a PWM controller looks more like:
- Watts Array / Vmp = Imp-array
- 900 Watts / 36 Volts Vmp = 25 Amps "high noon" current
Note, the Imp-array will be (mostly) affected by the amount of sun light hitting the panel. Battery Voltage will not matter near as much (between 12 volts and ~30 volts, the Imp-array will be about the same current).For MPPT controllers, the work on the Pmp=Vmp*Imp principle... So, on cold weather Vmp is high (Imp is about the same over temperature for our needs), Pmp will rise. In normal warm weather, the Vmp will fall by almost 20% (plus you have another ~5% loss in the charge controller).... More or less, the typical (no winter) maximum power production would be:
- 900 Watts * 0.77 panel+controller derating * 1/29 volts battery charging voltage = ~24 amps typical max output (MPPT)
- 900 Watts * 0.77 panel+controller derating * 1/24 volts battery charging voltage = ~29 amps typical max with discharged battery
A MPPT controller can give you ~10% to 15% more current in sub-freezing weather--But that is not, usually, the reason for getting MPPT controllers. The usual reason is you can get "GT solar panels" (less expensive solar panels, but more expensive MPPT type charge controller) and put the panels farther away from the battery bank+charge controller (longer wire runs)--and get very cost effective system (reduce copper wiring costs).For larger systems (say over ~800 Watt), an MPPT type system + GT panels is usually a better choice. For smaller systems (typically less than ~400 Watts), a PWM system can be a better (more cost effective) system.
Does that make sense?
-Bill