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We use up to about 100A at 24v. It's spread over a pair of lithium batteries with their own fuses. A tiny loss. Most of the time the loads and charging currents are way less.

Get your alternator tested. Then you will know

We have a 27 litres hot water tank with a 1200w 220v immersion heater installed. The boat AC wiring is 220v. We have 740w of solar installed. To heat hot water we use a very cheap 110v inverter. If you feed a 1200w 220v immersion heater with 110v the immersionn heater element only takes 300w...

Interesting. I am on a boat. We have a 280Ah 24v battery with JK BMS. I was think of building a second, smaller battery with another JK BMS and running them in parallel. We charge via 920w of solar and a pair of Victron MPPTs. It sounds like I could add a 100Ah battery in parallel with little...

I just installed a Siba Nh00 gG industrial fuse on my second lithium battery. Like class T but more easily available in Europe and cheaper.

I just made my busbars from copper bar. I drilled and tapped for M8 metric bolts. Busbars mounted on nylon bar at each end. Works nicely and way cheaper

What about calendar aging? What about temperature? 6000 cycles is quoted at 25degC. We are in the Tropics with batteries constantly around 30degC. Poor for lifePO4 cycles but better for calender aging. Who knows what life we will get. Lots of people on boats get 8 years out of 6v Trojan T105s...

We haven't gone the wakespeed regulator route yet for our soon to be fitted 24v 155A alternator. We are on a boat somthe 450cc twin cylinder diesel genset can kick out over 100A at 24v for less than 2 litres per hour

Opinion based on experience ?

Have you thought about hanging some panels on the guardwires? They act as spray dodgers at sea and fold them up to horizontal to catch the sun or what ever angle the sun is at

No, some have a braking system. By no means all.

I will swap the windlass over to the start batteries. It's easy to do. I plan to build a second lithium bank in the next 12 months. I will use the same JK 200a BMS. Halving the load will be useful and provide some redundancy. Thanks for your input, much appreciated

Thats w That is what I use. A fraction of the cost of class T but they do the job perfectly with the same AIC capability. It just shows what a rip off Class T fuses are

The ones a purchased were originally from RS conpnents. Bar code on the box backs this up. Like I said. £8

It may depend on how you use your batteries. Those living aboard a boat and doing electric cooking, charging off high output chargers, run the risk of unbalanced cells. Doing this with Cheap drop in batteries with passive balancers and no Bluetooth to the BMS may end in tears. I have friends who...

hmm, my 44ft boat is 41,000lbs fin and skeg, 7 ft 2 inch draft. we have done 37,000nm in here in the last 11 years with 3 Atlantic crossings. We dont get jolted by waves. We have never been knocked down.

Why do you feel the need for marine rated? What does that mean? Are you talking IP rating? Is the full electrical installation IP rated? Engine, alternator, starter motor? I think its more importent to consider where batteries are located. Don't stick them under the floorboards! On my boat, the...

My little lifepo4 batteries I diy built, have mech vent 24/7. Seems like it's the right thing to do. Not so easy on drop in batteries. So DIY can be safer than very expensive closed cased batteries ?

All the talk by manufacturers of numbers of cycles. Who has actually done a few? I am new on the lithium scene. I built my 24v 280Ah bank for my boat 3 months ago. We have done a massive 23 cycles? Is there anybody out there that has done a few thousand?

In the sailing world, Victron has the MPPT market sewn up. Nothing else comes close. 5 year worldwide warranty and Bluetooth to your phone or tablet. What's not to like. Who wouldn't be without the Victron smart shunt on a sailing boat. If you have a land based system, there is lots to choose...

For an RV, bluetooth and active balancing is not such an issue. If your battery has a shut down. You get to go and eat at the pub? On a boat, you may be entering a harbour in bad weather at night. Your battery shuts down and the navigation lights on out, the radar and autopilot stops working...

The intention isn't to save anything. It's to have better cells and BMS than a cheap battery. It's to have an active balancer not a passive balancer inside a battery case creating possible hot spots on the cells that will cause premature cell failure. Its having a BMS i can adjust and see what...

Storm in a tea up. Its fixed with new software update. Andy wouldn't make much money if his videos were boring?

Have a look at 18650 Battery Store. Grade A cells

No. That uses way too much power. We have a mattress cooler instead. Like aircon for the bed?

This is what I am using. A fraction of the cost of class T and similar or better AIC. EBay in the UK is full of NH00 fuses and holders

With regard to your installation in the engine room. What we know about lifepo4 and heat. 25degC is perfect for lithium. 35degC constant ambient temperature will half the life. 45degC will half it again. We cruise the Caribbean in winter and the batteries sit at ambient most of the time plus a...

First question, why do you have AGMs? Is this a legacy from pre lithium? If the answer is yes, then you are very unlikely to use those batteries once you have the lithium set up. Charge the lithium with all the solar. It will have way more efficiency than the lead batteries. Wasting some of your...

No, I am retired. 60 next year

My 24v built is 100L fridge freezer with lots of insulation, uses a 45w compressor running 20 mins in the hour. Less that 0.5kWh/day. In the heat of the Caribbean