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I think these two "wordings" are for the same feature. I had my built battery sitting for two months at about 40% discharge (reading here that storing at 100% SOC was bad on cells). No external loads were on the battery during the two months. The Bluetooth was on as I checked in on the...

I wanted to thank this forum for all the support. Especially Michael B. Caro for his infinite patience in my first purchase with China during extended shipping delays and of course Will for all his great video tutorials. NO way could I have done this without those. Here are my almost final...

I've skimmed through this thread, but its mainly about actually keeping the battery warm. I'm more interested in the why? And specifically... I'm wondering about storage. I'm on another boat forum and I share some of what I learn from this forum with them. Someone over there posted the...

I have a Lishen 272 Ah battery using a Overkill Solar BMS. This will be going into a boat. During the boating season, it will be used more heavily. My question is for the off-season. Say for four months, it will be sitting idle. It will likely have a small fan and maybe some electronics...

Trying to be as thorough as possible, I've Top Balanced and Capacity Tested my first battery build. I received the cells on 2/11/21. My cells did not come as consecutive numbered items (see table below). I'm assuming this is a sign that they were hand-selected as being similar to each other...

I've received my (4) Lishen 272 Ah cells and have started my first Top Balance. Normally, I know one typically has a single positive post and a single negative post. I have a limited volume for mounting my system in a boat, but will have ready access to the top of the battery. Consider, that...

I'm using the Blue Sea's gauge calculator. When I use the defaults with simple setting, I get an answer, but it also says in fine print that its capacity is a lot higher. For example, if I use 12 VDC, 5 amps, 30 feet, I get an answer of AWG 12, but in fine print it says, "Capacity per ABYC...

I'm not looking for the obvious answer. So, please bear with me... There is the easy (obvious) answer. A very large battery bank and a equally appropriate (huge) solar panel array in a stationary setting with clear view to the sky... say in Arizona. The batteries are deeply discharged...

I've seen many posts and pictures on the forum of people taping their large cells (280 Ah) together using the fiber packing tape. Unfortunately, I didn't find any one thread specifically addressing this topic. I've also seen posts here and on other forums and blogs saying the cells need to be...

Thought someone DIY minded might be interested. https://www.hackster.io/news/new-off-grid-solar-inverter-design-reaches-99-5-peak-efficiency-75eb22fad017

I know this isn't really a common Inverter size for most people on this forum. Someone might find it useful. Got the 300 watt Giandel pure sine wave inverter in and wanted to test it. The premise was that if it really got 95% efficiency running low wattage items (< 100w) I could justify having...

I'm looking at pure sine-wave inverters in the 300 watt range. These two seem to top out the Amazon selection and both have MANY good reviews. Far more than can be explained by "cheat" reviews. Thanks for the reference. Giandel 300 watt or Bestek 300 watt

I'm doing a small off-grid system for a small sailboat. I want to utilize every amp-hour I can generate and store efficiently. Most things like lighting, marine electronics and even USB charging will be on 12 VDC. For large, temporary loads like an inverter microwave or blender I will be...

In retrofitting a small sailboat, I will be buying my first Inverter. Probably a GoWISE that Will recommends. I notice some brands tout GFI AC outlets. I'd have to add one to the boat external to the GoWISE. What is the safest concepts and are the ramification of doing this on a boat and in...

Preamble I am going to be doing some wiring in a sailboat. From large gauge for the Inverter and Windlass down to tiny stuff needed for LED lighting. The boating industry has somehow gotten into its head that all wiring must be tinned, which seems strange, since apparently soldering a lug on a...

I received the 300 V/100 amp, volt, current, watt meter that Will recommended in one of his videos for capacity testing and I am using it to test my Aspenora fridge in another thread. I think I understand all the fields... BUT... there is a resistance field (circled). What is that suppose to...

I'm renovating a small sailboat and will be installing a full solar system from what I'm learning on this forum. For this post I wanted to show-and-tell what I came up with for a small refrigerator/freezer. I probably should have asked for advice first, but made the jump without a net. I...

I am looking at the GoWISE brand Will is recommending and found it on Amazon. On Amazon's page are two versions that imply to me one is a newer version or one with extra options. The normal one like in Will's videos and a second one with a few extras. The second one has the same specs, is...

I'm looking at Will's Classic 400W System. A couple of questions came to mind. Why does the 50A circuit breaker mount after the 100-250A main fuse? If my inverter draws too much current and pops the fuse, the solar panels will not be able to charge the battery. I would have thought it...

I'm putting together my first system and would like to ask a basic Inverter question. I'm going to use the Overkill Solar 12V/120a BMS. It should be able to drive a 1500W inverter. Would there be any advantage to getting a 2000W or 3000W inverter? I know the BMS will trigger long before...

Building my first system and looking into charge controllers and have a few basic questions. Most of these controllers claim 99%+ efficiency. All seem to have huge heat syncs. One said it needed to be in an open area with 9" clearance because of the heat it generates. I've heard of wood...

First post, but I have been doing a lot of reading on the forum and watching Will's videos to educate myself. I want to put together my first system for my small sailboat. This is merely to replace two deep cycle lead acid batteries (one to start motor, one house). I'll try to primarily run...