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Post by notrollsplease on Aug 28, 2018 14:34:42 GMT
I recently bought an 800 watt 24V kit, with the 40A charge controller, a 170aH LiFePo battery and a 2000 watt inverter. Before buying I called and asked if all these components were compatible and made sense. I was told yes.
Today when I was attempting to find a wiring diagram (since no information is shipped with the kit) I found a statement that said “it is not recommended that you charge a 12V battery with a 24V solar array. Doing so will result in a performance loss of 50%"
Do I need to send all the panels back?
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Post by bupkis on Aug 28, 2018 14:43:57 GMT
notrollsplease, not enough info, when say 24v kit does that mean you have 24v batteries?
The 40A controller mppt?
MPPT controller allows for higher voltage panels and or panels in series which increases input voltage, the controller finds the max power pt (mpp) and sends that amount of power to your 12v battery to charge.
Now a PWM controller with 24v panels charging a 12v battery and you will loose about 1/2 the power.
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Post by jsb2000 on Aug 28, 2018 15:04:44 GMT
Well, you could purchase a second battery and connect the two in series to obtain 24VDC.
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Post by Admin on Aug 28, 2018 15:41:20 GMT
I recently bought an 800 watt 24V kit, with the 40A charge controller, a 170aH LiFePo battery and a 2000 watt inverter. Before buying I called and asked if all these components were compatible and made sense. I was told yes. Today when I was attempting to find a wiring diagram (since no information is shipped with the kit) I found a statement that said “it is not recommended that you charge a 12V battery with a 24V solar array. Doing so will result in a performance loss of 50%" Do I need to send all the panels back? The 800W 24V kit with the 40A controller is dedicated to 24V battery banks. If you were trying to charge a 12V battery bank the max input recommended for the 40A controller is 400W. You could either: 1. Connect 4 panels to your controller and charge your 12V bank, but have 4 panels extra OR 2: Buy another battery bank to turn your system into a 24V bank. This is information that should have been presented to you. If you have other issues, please consult Renogy customer service to review your case. Renogy 2775 E Philadelphia St, Ontario, CA 91761, USA TEL: 800-330-8678 TEL: 909-287-7100 -Renogy Team |
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Post by tattoo on Aug 28, 2018 16:14:23 GMT
Why don't you set it up like it sounded like you asked Renogy for...... 24V
It's better than 12v but it cost way more....
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Post by bupkis on Aug 28, 2018 16:40:30 GMT
Hi Admin, does Renogy carry any 24v 2000w inverters?
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Post by Admin on Aug 28, 2018 16:59:42 GMT
Hi Admin, does Renogy carry any 24v 2000w inverters? At this moment Renogy does not, but it is a future development. We distribute 24V inverters from other companies, by which a 3000W is available on our website. Other inquiries the sales department should be able to help you. -Renogy Team 2775 E Philadelphia St, Ontario, CA 91761, USA TEL: 800-330-8678 TEL: 909-287-7100 |
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Post by notrollsplease on Aug 28, 2018 17:05:50 GMT
Why don't you set it up like it sounded like you asked Renogy for...... 24V It's better than 12v but it cost way more.... It turns out, according to Renogy, you can't wire the Lithium batteries in series so 12V is all you can work with. |
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Post by notrollsplease on Aug 28, 2018 17:07:18 GMT
Well, you could purchase a second battery and connect the two in series to obtain 24VDC. Apparently you can't wire Lithium batteries in series (according to Renogy) |
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Post by notrollsplease on Aug 28, 2018 17:09:04 GMT
The 800W 24V kit with the 40A controller is dedicated to 24V battery banks. If you were trying to charge a 12V battery bank the max input recommended for the 40A controller is 400W. You could either: 1. Connect 4 panels to your controller and charge your 12V bank, but have 4 panels extra OR 2: Buy another battery bank to turn your system into a 24V bank. This is information that should have been presented to you. If you have other issues, please consult Renogy customer service to review your case. Renogy 2775 E Philadelphia St, Ontario, CA 91761, USA TEL: 800-330-8678 TEL: 909-287-7100 -Renogy Team I've been told by Renogy that I can't buy another battery and wire them in series as you can't wire Lithium batteries in series. Is that correct? |
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Post by Admin on Aug 28, 2018 17:37:08 GMT
The 800W 24V kit with the 40A controller is dedicated to 24V battery banks. If you were trying to charge a 12V battery bank the max input recommended for the 40A controller is 400W. You could either: 1. Connect 4 panels to your controller and charge your 12V bank, but have 4 panels extra OR 2: Buy another battery bank to turn your system into a 24V bank. This is information that should have been presented to you. If you have other issues, please consult Renogy customer service to review your case. Renogy 2775 E Philadelphia St, Ontario, CA 91761, USA TEL: 800-330-8678 TEL: 909-287-7100 -Renogy Team I've been told by Renogy that I can't buy another battery and wire them in series as you can't wire Lithium batteries in series. Is that correct? We deeply apologize for the confusion. The 100Ah LFP and 170AH LFP battery cannot be connected in series only parallel. The information presented to you by the sales rep was incorrect. After you make a decision on what you want to do, whether it be return 4 panels, or workout a solution with the 100Ah LFP, or whatever solution you want, We recommend you present your case to Customer Service where they can be briefed beforehand on your situation. -Renogy Team |
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Post by notrollsplease on Aug 28, 2018 17:47:18 GMT
So if I return the 170aH battery and order a second 100aH battery I could utilize all 8 panels?
I just looked at the specs for the 2000W inverter I bought and it is optimized for 12VDC input. I'm wondering if that shouldn't have been sold to me either. If I get the second 100aH battery then I'll still have a 24V system which isn't going to be great with the inverter....
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Post by Admin on Aug 28, 2018 18:43:09 GMT
So if I return the 170aH battery and order a second 100aH battery I could utilize all 8 panels? I just looked at the specs for the 2000W inverter I bought and it is optimized for 12VDC input. I'm wondering if that shouldn't have been sold to me either. If I get the second 100aH battery then I'll still have a 24V system which isn't going to be great with the inverter.... The information has been centralized to provide you one final update, this will be reflecting on listings and portals as it is misleading. The 100Ah and 170AH LFP batteries can NOT be connected in series, only in parallel. Your system will not work in 24V which is how it was sold. With your current system you are able to still connect 4 x 100W panels to a 40A controller connected to one 170Ah battery and utilize the 2000W inverter (ONLY 12V). Given newly presented information, the recommendation is still the same to contact customer service and determine what kind of plan you want out of your system. Apologies for the mess, -Renogy Team |
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Post by tattoo on Aug 28, 2018 19:22:16 GMT
I didn't think that Renogy sold anything but 12v systems..... I guess I was right....
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Post by tattoo on Aug 28, 2018 19:24:12 GMT
I just looked at the specs for the 2000W inverter I bought and it is optimized for 12VDC input. You can still use the 2000w inverter..... Well that is if you stay with 12v batteries.... That's what I would go with it's way simpler and is just fine with smaller solar systems... |
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