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    DIY 200ah LFP underperforming

    Hi, I built a 200ah LFP battery at the start of the year (see other post on here) and it's been performing pretty well. It lives in my camper and it's recharged by 350w solar and a 30a dc-dc charger. It has a constant load of around 2a as well as the fridge which pulls an additional 5a for a...
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    Lfp volt drop at high load

    Hi, I've recently finished building a 200ah battery. It's a 12v battery in 4s config. I tested an induction hob via an inverter which worked, but I noticed the cells dropped by around 0.3v under load (it was around 100a) - is this normal or have I done something wrong? Thanks in advance...
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    DIY Flight case style battery box build

    Hello! I thought it's about time I give something back to the forum. I searched high and low for DIY battery boxes, but couldn't really find anything I liked. I'm in the process of making my own. in the style of a flight case. I've gone for the rugged industrial look. I'm no carpenter or...
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    Top charging from bench PSU

    I've got 4 of these cells which i believe need to be top charged to 3.6v before I build my pack. I set this PSU to 3.6v and connected to the first cell over 14 hours ago. When first connected, the voltage showed 3.4v, rising to 3.5v after about an hour. I just want to double check that I'm...
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    4S heater location

    Hey folks! I'm planning to build a box for these LFP cells tomorrow. I'll be building it out of plywood. The BMS comes with a single heater. where is the best place to mount it? It seems like all my options will heat one cell more than the rest or heat things unevenly. I'm wondering if some...
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    Positive shunt for monitoring alternator output?

    Hello, I'm l to add an amperage monitor to my alternator. Reason being is that there's a chance it could be overpowered if several rare conditions are true, and I'd like to monitor this and switch accessories off whilst driving if it happens (a monitor with a relay or buzzer that will trigger at...
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    DIY 4S LFP Battery Enclosure

    Hello again! I've searched the forum but can't really find an answer. I've got 4x 3v cells with dimensions of 30x20x8cm HxWxD Per cell. Giving me a total pack dimension of 30x20x42 (Allowing for some foam between cells) I'd really like to enclose the cells and BMS within an enclosure. I had...
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    12V 4s Separate port smart BMS recommendations?

    Hi All, I know this has been asked a thousand times but I've had a look through previous posts and can't find what I'm looking for. I'm planning to build a 200ah 4S pack. I already have 4x cells and am now looking for a BMS. Daly seem popular but I've also seen/heard some bad things about...
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    Do I really need a DC-DC or can I go with a high power alternator?

    So I'm still looking at the best way of charging my 200ah LFP aux battery in my camper conversion. The more research I do, it seems like all a DC-DC charger really does is limit the current from the alternator to protect it. From what I can tell, it seems like if I had an alternator that was...
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    Smart BMS with Wall mounted monitor?

    Hi Everyone, I've just purchased 4x 3.2v 200ah LifePo4 cells which I'll use to make a 12v bank. I've not decided on a BMS as of yet, I'm not convinced on the DALY and have seen some no brand 'designed for medical' ones on ebay which look good. this will be for my campervan and one main...
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    Using existing MPPT Charger instead of DC-DC Charger for two way vehicle charging.

    Hi all, I've recently decided to replace my lead acid aux battery with a LifePo4 pack in my campervan. My current setup charges the Aux batt from the alternator, if the main batt reaches fully charged level. And it will charge the Starter batt from the solar if the aux batt reaches charged...
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