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Grape Solar

Model GS-MPPT-320W

Internet #202959980

320-Watt MPPT Solar Charge Controller

$174.98 /each

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Product Overview

The GS-MPPT-320W solar charge controller keeps batteries regulated and prevents them from overcharging and discharging. Applying an intelligent MPPT algorithm. It allows the GS-MPPT-320W solar charge controller to extract maximum power from the solar array by finding the maximum power point of the array.

  • Works with higher voltage panels
  • MPPT means higher power conversion efficiency
  • Digital display shows instantaneous power production
  • Ideally suited for Grape Solar panels 320-Watt and less
  • Allows for series connections of smaller panels
  • Maximum solar module open circuit voltage inputs: 50-Volt
  • Maximum solar module power input: 320-Watt
  • Maximum input current: 18 Amp
  • Nominal battery voltage output: 12-Volt
  • Works with sealed lead acid, vented, gel and NiCd batteries
  • Maximum charging current output: 25 Amp
  • Standby power consumption: 2-Watt
  • 3 stage charging method: bulk, absorption and floating

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Warranty / Certifications

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Customer Questions & Answers

21 Questions28 Answers

Customer Questions & Answers

320-Watt MPPT Solar Charge Controller
320-Watt MPPT Solar Charge Controller

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3 answers

Is this a true mppt controller. Or a fake .

This question is from 320-Watt MPPT Solar Charge Controller
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July 14, 2016
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Asked by
Wisconsin
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Home Improvement Profile: DIYer
August 8, 2016
Answer: 
Yes, it IS an MPPT controller. Ours arrived 2 weeks ago and it is exactly as advertised here. It's stamped on the front of it as well.
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July 15, 2016
Answer: 
YEs, this is a real mppt solar charge controller.
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Asked by
Illinois
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Home Improvement Profile: DIYer
July 15, 2016
Answer: 
If you are referring to the Grape Solar 320 MPPT Controller, unfortunately it is not. Someone handling the advertizing either on Grape Solar's end or Home Depot's end misque'd. It is a 320 watt PWM controller. I had the same question and finally talked to a Support Technician at Grape Solar. He told me that they do not at this moment have any 320 watt MPPT controllers on the market. Their factory in Read More
If you are referring to the Grape Solar 320 MPPT Controller, unfortunately it is not. Someone handling the advertizing either on Grape Solar's end or Home Depot's end misque'd. It is a 320 watt PWM controller. I had the same question and finally talked to a Support Technician at Grape Solar. He told me that they do not at this moment have any 320 watt MPPT controllers on the market. Their factory in China is trying to get them made, tested, warrantied, and delivered to Home Depot in the next two months. Probably by the end of August. If you need a controller for a current project this PWM version will do fine. If you are using Grape Solar's 160 watt Mono panels this controller will only recognize 12 vdc systems so be careful how you wire your components. Smoke is not good.
Grampa Bud Read Less
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3 answers

i want to have 2 160 watt panels run in series can this controller handle it.

This question is from 320-Watt MPPT Solar Charge Controller
Asked by
ventura ca
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April 30, 2016
my battery bank is 12 volts
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Asked by
Wisconsin
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August 8, 2016
Answer: 
Yes, that is exactly why we bought it. We are starting with ONE 160 watt panel but wanted this controller in case someday we want to buy a 2nd 160 watt panel.
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May 2, 2016
Answer: 
Yes, that will work with this controller.
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May 1, 2016
Answer: 
No, this model can only handle one panel.
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2 answers

Will this controller handle 3 GS Star 100W panels

This question is from 320-Watt MPPT Solar Charge Controller
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OHIO
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January 17, 2016
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Asked by
Wisconsin
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August 8, 2016
Answer: 
It is a 360 Watt controller, so we figure it handles any combination of panels up to 360 watts.
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January 18, 2016
Answer: 
Yes, as long as they are connected in parallel in a 12-volt system.
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2 answers

Can I connect a solar panel to electric boat motor with this

This question is from 320-Watt MPPT Solar Charge Controller
Asked by
Maryland
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August 24, 2015
I have an electric trolling motor on my canoe. I think it draws about 20 to 60 amps depending on speed while running at 12 volts. Can I connect a 12 volt 200 watt solar panel directly to my trolling motor with this mppt controller? It would be ok if I had to also have a small lead acid battery in the circuit.
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Asked by
Wisconsin
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August 8, 2016
Answer: 
If I follow you correctly, and knowing how large our 160 watt grape solar panel is, and also owning a canoe, your 200 watt solar panel would most likely take up over half of your canoe. I suppose it could be done but would look hilarious! If it were me, I'd have at least two marine batteries....one on the canoe, and one or two back at camp, hooked up to the solar panel and controller, being charged. Read More
If I follow you correctly, and knowing how large our 160 watt grape solar panel is, and also owning a canoe, your 200 watt solar panel would most likely take up over half of your canoe. I suppose it could be done but would look hilarious! If it were me, I'd have at least two marine batteries....one on the canoe, and one or two back at camp, hooked up to the solar panel and controller, being charged.
When I did some research to learn what we needed, every place I read you needed to have the same size and type of battery hooked up in series. IE. you can't hook a 6 volt battery and a 12 volt battery, or two different types of 12 volt batteries up. The controller has a setting for the type of batteries you have. Read Less
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August 26, 2015
Answer: 
Hi Nocantdo,
Thank you for your interest in solar. Unless your motor is designed for it, you generally need to connect your charge controller to a battery and then connect that to the motor.
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Customer Reviews

Rated 4.3 out of 5 by 3 reviewers.
Rated 5.0 out of 5.0 by We love it, it does the work it's supposed to do! We purchased this with the Grape 160 solar panel and found installation was a breeze. My boyfriend who I convinced to purchase this loves how it shows him the battery levels among all the other features it does. We knew it was a little "overkill" as it's twice what we would need for our solar panel but figured this way if we purchase another panel down the road, we already have a controller that can handle it with ease. It's nice to know it's there helping our panel do the best job it can and protects our batteries from over charging. August 8, 2016
Rated 3.0 out of 5.0 by Product OK ; Home Depot Advertizing Incomplete. Home Depot's advertisement says this is a 320 watt MPPT controller. It may be, but I have a 24vdc system on my camper with two 12vdc deep discharge batteries in series. No where does Home Depot tell you that this is only meant for 12vdc battery banks. I had to return it because I didn't want to produce $183 dollars of smoke. July 5, 2016
Rated 5.0 out of 5.0 by Works very well very fair price. Support was superb. Works very well very fair price. Support was superb. If you dont need 500 watts then this 320w unit has all the bells and whistles you could want and the eppt maximizes your solar rays. Good stuff. August 9, 2014
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