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I'm hoping to move forward on replacing my 4 dead 12V AGM sealed lead acid batteries. I have found some in the Solar Products area on this web site but I'm not sure if I can switch out my current batteries with LiFePO4 ones. My system is small, 900W of solar panels, 4 @ 12V 100AH batteries...

I want to replace my 12V AGM lead Acid batteries and am not sure of sources. Is there a list of sources in this forum somewhere? I'm thinking I'll just stay with what I've got instead of switching to LiFePO. Too complicated for me.

Thanks for your suggestion but I already bought the 24V inverter about a year ago so no option for 48V. My question then is still what kind of batteries will work on my small system. I can call SunGold or some other vendor but was hoping to get some ideas from this forum.

I built a small 600W system using Will Prouse' website 5 years ago for my off-grid cabin. I used 4 100AH AGM lead acid batteries that now need replacing. I'm thinking about 4 LiFePO batteries. I'm a novice and am not sure that is a good idea. My 5 year old MPPT charge controller has a 1030W...

Good to know more about the power saver. I did turn on one light when I first tried to turn on the inverter and nothing happened. That made me wonder whether the the power saver suggestion had much potential to solve the problem. But, your suggestion gives me some hope. Thanks!

Good suggestion. Thanks. I've learned from watching a video of this inverter that "AC input: Abnormal" simply reflects the lack of grid or generator AC input neither of which I have so that error is irrelevant to my system. I haven't managed to get the inverter to power up yet but I took a...

I switched out my Giandel PureSineWave Inverter (2000W/4000W surge/24V) for the SunGold one at my small off grid cabin. Here are the other components in my solar setup: 900W from 9 100W solar panels Epever 24V Charge controller (max 1040W at 24V) 4 @ 12V -100 amp sealed lead acid batteries...

Thanks. That's so easy. I'll order some. There is a place to select "Lot number" from 1-100. I have no idea what this means. I will send an email to them but if you know please let me know. I'm thinking I just need one on the positive line of each string, correct?

Ok, will do. I've had trouble finding DC breakers. Do you have a source or suggestion?

OK, 10A fuse on each string (all are 5A) that can handle 60V before connecting to MC4-3 to 1 connector. Would I just put an in-line fuse on the positive wire or both? Are there MC4 connectors that have fuses in them? That would be the easiest I think but I"ll google in-line fuses. I'm using...

Thanks Jim. I'll watch the video. I found one on the web already and watched it so think I'm getting the message. Appreciate you help. Dot

I currently have the wire from the panels attached to a 15A breaker before it goes into the CC. I'm not sure where and what size fuse to put on each string. Would you mind giving me details or a photo of that. Might have to live with a voltage drop because pulling new wires in my underground...

Oops, I confused myself. I'll have 15A not 20A and 54V so I 10 ga wire even more okay unless the distance is any issue.

Thanks for replying so quickly Maddy. I do indeed have a 24V system so it looks like I will be okay adding 300W of panels. Good to know that if I add another group of panels that I'll need to get another CC. My panels are about 40 ft. from my CC and I'm using a 10ga. wire to connect the two...

I have 600W of solar (2 strings of 3 panels each (100W, 5.7A, 18V) in series connected in parallel = 10amp&54V)) going into my 40A Epever MPPT CC. I want to add 3 more 100W panels for 900W total (3S3P=a total of 9 panels, 3 panels connected in series X3 and those 3 connected in parallel to each...

Here's a photo of my setup. Would you mind telling precisely where to run the shunt? That would be so helpful if you have the time. Many thanks!

Thanks for you thoughts. The batteries have only cycled hard (below 50%) 2 times and for short periods of time. My understanding is that would not cause too much damage to them. I'm going to try turning the inverter off at night to see if they hold a charge better when it is not pulling on...

Batteries are only 2 years old. The whole system is 2 years. I'll look into the tool you suggest. Thanks.

No problem with panels. They fully charge batteries easily every day, even when shady. I'll check connections.

Hi there! I'm a Texan too. Lived in Austin for 10 years in the 70s. Sadly, I don't have a shunt. I built this system for my cabin using Will's website info and didn't add a shunt. If I have unplugged the line from the inverter to my circuits then the only 2 things that could draw current...

When there is no solar power to my 600W panels at night and no electrical draw on the batteries (24V and 400 ampH), my Giandel inverter alone is reducing the voltage well below the 50% level for the batteries. When I turn the inverter off, the voltage returns to a reasonable level. In other...

Interesting about the mate notifying me. I'm not sure I have the patients to figure that one out! Someday perhaps. You raise a good point about my cabin system. Since I have the remote switch for the inverter and the BMS and Optocoupler are pretty cheap, I'm going to think about this a...

Thanks again. That makes total sense to me. I have an off-grid cabin on solar and I notice how the volts jump around when there is a draw on and off the system. I'll change the LVC as you suggested. Wish I could figure out an alarm so I'll look into that. Since we are on this topic, I...

Thanks you so much for this info! I'll reprogram my LVC to 48. I'm surprised that the solar installer who put the system in set it so low. It's a big company. They should know better I think. Anyway, appreciate your help!

I have 4 Outback Energy Cell 200 NC batteries in my grid tie/battery backup system. I've finally forced myself to learn how to use the Mate to reprogram or check settings by necessity (after 12 years!). We had a serious winter storm this week that took out my AC power for 3 days and that...

If I understand what you're suggesting, I select "user" instead of "sealed" and then fill in the parameters with a zero for equalization. I'll check the manual to be sure about the other parameter values as you suggested. Is that correct? I hadn't thought of customizing to my specific...

Is there another option? They weight too much and there are too many to load in a car. I don't think I'll be charging them often with something other than solar but should have a backup plan.

My small 600 watt system is up and running after a hard 6 months of pulling everything together with very little electrical know how. I'm putting in lights and fans after 25 years of living off a single battery that I lugged back and forth to my other house in town. I don't think I could have...

Hello - I have 4 six mo. old sealed AGM batteries that I don't think need to be equalized every month. (Right?) When I choose the "sealed" setting on the MT50 they will be equalized on the 28th of every month. Can I reprogram the MT50 to stop equalization? In a youtube I watched, someone in...

So sorry to bug you about this given your situation. Thanks for even bothering to reply. I've got it figured out. Take care as much as you can.

Hey JeepHammer- I've come a long way since this earlier post but now want to understand a point you made in your post. I had my electrician run my10 or so 12 awg romex circuits into a breaker box which I intended to power directly from my 24V 2000W inverter. Your post suggests I might need a...

Thanks. I will email solar epic now and see what they say. I watched a youtube yesterday where someone chose not to select sealed even though their batteries were sealed just to avoid the equalizing that the CC does with sealed ones. So I think the chart of how batteries are treated...

Hi again - I'm just about to get my solar system running and need to set up my charge controller. It's the one recommended on Will's 24V off grid small system. I have 4 100Ah AGM batteries. In the settings menu the battery choices are: 1) sealed 2) gel 3) flooded and 4) user. AGM is not an...

Ok, I'll add to my HD list. There are no solar stores in Baton Rouge and electrical store sales folks little to nothing about DC. Everything has to come from HD or online. Makes putting this system together even more challenging! Thanks so much!

Thanks Steve. This is helpful. I had located the lay-in-lugs at ISPCO but had to buy 100 when I only need 6. So I didn't. I found something like it at home depot but it isn't as hefty looking but maybe ok for my small system. Do you have a source for buying the one pictured above...