SUN 435W Modules Grade-B, with MorningStar SunSaver mppt charge controller.

pyana1 · November 2014

im interested in purchasing this "SUN 435W Modules Grade-B" with a MorningStar SS-MPPT-15L SunSaver mppt charge controller but dont know if they're compatible. can someone please help?

the specs reads :

$/w 0.64
Cell Type Mono
Connector type MC4
Frame Anodize Aluminum
Spec Download Now
Watts 435
Cells 128
Panel Vmp 72.9
Panel Imp 5.97
Panel Voc 85.6
Panel Isc 6.43

url to panels ---- http://sunelec.com/sunpower-435w-modules-grade-b.html

the morningstar sunsaver mppt charge controller specs reads:

•Peak Efficiency
97.5%
•Nominal Battery Voltage
12 or 24 volts
•Max. Battery Current
15 amps
•Battery Voltage Range
7-36 volts
•Max. PV Open Circuit Voltage
75 volts
•Nominal Max. PV Input
12 volt battery
200 Watts
24 volt battery
400 Watts
•Output Rating
15 amps load control
•Self Consumption
35 milliamps
•Transient Surge Protection
4 x 1500 Watts

url to mppt controller --- http://www.morningstarcorp.com/wp-content/uploads/2014/02/SSMPPT_ENG10_1111.pdf

additional information for application: go power 1500 pure sine wave, 4 trojan 6 volt batteries.

Cariboocoot · November 2014

Re: SUN 435W Modules Grade-B, with MorningStar SunSaver mppt charge controller.

Welcome to the forum.

No, those two items are not compatible. Here's why: Voc (Voltage open circuit) on the panel is 85.6 whereas the maximum PV open circuit Voltage of the controller is 75.

What is more that 435 Watt panel could produce about 28 Amps on a 12 Volt system and the charge controller is only rated for 15 Amps.

Basically that panel would be instant death for that controller.

If you want to use that panel I'd suggest you get a MidNite Kid charge controller for it: http://www.solar-electric.com/inverters-controllers-accessories/chco/misoclchco/midnite-solar-kid-mppt-charge-controller/midnite-solar-kid-mppt-solar-charge-controller.html

$60 more but can handle up to 150 Volts input and 30 Amps output.

You might want to rethink that panel though, as the down-conversion from 72 Volts to 12 is not very efficient and it is bound to be a very large and unmanageable unit.

pyana1 · November 2014

Re: SUN 435W Modules Grade-B, with MorningStar SunSaver mppt charge controller.

thank you very much @Cariboocoot

SUN 435W Modules Grade-B, with MorningStar SunSaver mppt charge controller.

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