One question about fuses is that if a battery has it own BMS capable of 100A or 200A what is the purpose of so big fuses?

Thanks, Nick

Hi, thank you for sharing and making clear some points. I could be wrong on the battery capacity sizing your formula would not be: 6500 wh+(6500 wh*0.8* 1.25), 80%?

🎁 Free Diagrams: cleversolarpower.com/free-diagrams/ 📖 My Best-Selling book on Amazon: cleversolarpower.com/off-grid-solar-power-simplified My done for you service: cleversolarpower.com/product/solar-system-review-service/ 12V 200Ah battery from Redodo. cleversolarpower.com/go/red12v200ah use code 'clever' for a 5% discount

bravoo

Thanks for the great video. Practical question. I have 2x 20a mppt i want to connect them to a 250ah battery. How should I practically do that? Connect both mppt's to the battery-poles? Or first bring them together, and then with one set of wires to the battery?

ขอบคุณสำหรับข้อมูล

Really great overview! Generally efficiency and idle consumption should be taken into account. Often the manufacturerers are not very honest with the specs esp. on idle/stand-by consumption! Some hybrid inverters take energy from the grid when idle - which is not acceptable imho!

I'm a dog

I've been off grid now for over 5 years, and built my entire system myself, including all upgrades. This is such a classic example of a video made by someone that knows all the theory but has none of the practical life experience to actually help people make the right decisions before beginning. Sure, there is plenty of information here, but practical application of that information is a whole different story.

Just use the max size cable the controller can take... that way if you add solar in the future you should be OK...

Full appreciation for your great effort, except calculation mistake for battery size, for 3 days autonomy, multiply by 3×24 ,please confirm.

are you sure to wire the panels in series? Doesn't it add up to the voltage?

Thank you!!! Great education

Ok. What about a motorhome/caravan fridge? They work differently to a domestic fridge. 🤔

My friend had 4 golf cart batteries Lives in van , use power for couple led lights and charge phone ! Charged with Generator or start van. Even after 4 hours never had a them charged totally…. After 2.5 years batteries won’t hold charge very long. Now only 2 batteries charges fine in 4 hours!

Great video . I have to say i got your book off of Amazon and when he got here I was very impressed on how thick it was and I'm about two chapters in and it is great reading and I'm starting to learn and understand the solar power system once I'm done reading the book I will comment

Now tell me how KZfaq knew I was thinking of this concept? I live in the tropics with an unreliable national power provider.

Do you have the soft copy of your book so I can just pay and download?

I noticed you didn't use the C-rate in your calculations for your battery capacity. Is there a reason???

About a 4 panel of 100 watt ???

Really clear videos with zero fluff, thank you!!

0:38 TV = 150W x 9:30pm 🧐 🤭

The solar panel slide you said 3 will be used but the cost slide you calculated for 10 solar panels.. Am I not understanding something or it's a little mistake?

What about 24v or 48volt systems? with a 3000watt invertor powering a standard household fridge/ freezer?

Then upsize as big as you can. All the items can be found at more competitive price points as well.

That victron 12/800 is 800 VA ,not watts. The wattage of a victron 12/800 is 560 watts, and the phoenix 12/1200 is 850 watts

Great analysis. 👍

Should be called, "charging lithium battery with lead acid"...

I need to install 1000 wat sostem 1 kw natery storage lothium please jelpe how to prosode woth dhe stiif i meed to by

Thank you very much for this eye-opening review. But apart from inverter idle power consumption, don't you think that charge controllers ~ especially MPPT,~ consume power from the batteries too? So, the charge controller energy consumption should be taken into consideration ,

In india high frequency inverters are much more expensive approximately twice as expensive

what is the fridge model # that uses 182kwh for 365 days ?

The biggest restriction is the battery config you have, fine if you are on 12, 24 or 48V, screwed on anything else.

Thanks for the video, i enjoyed it. I have 4 x 240ah 12v Lifepo4 batteries in parallel. Ive come across another 12v 300ah lifepo4 battery(same manufacturer). Would it be safe to add it to my battery bank? Thanks

i have a 2013 chevy volt which i put 2x 100w flexible solar panels on. they feed directly into the 12v system which imo is the most efficient way to do it. almost all EV's have about a 200-500watt loss through the 12v system when turned on, mostly to run the big beefy high voltage contactors, lights, infotainment, ect. they just go straight through a PWM charge controller for now, im pretty sure at low voltages a pwm is actually more efficient since the voltages are already at the right value. I added a 4kwh lifepo4 battery, which normally would be a bad idea. it has a little 15w heater and thermostat wired directly in to keep it above freezing, and no BMS, just an active balancer. the chevy volt is one of the only cars that uses a high voltage battery to start its engine so no need to worry about starter surge current. the volt doesnt do a good job of matching the lifepo4 battery since it looks like a floating lead acid most of the time, which is actually a feature. the solar panels keep the lifepo4 topped up and avoid the ~15% loss from stepping down from high voltage to low voltage (350v high voltage battery to 12v system) this being said, they only add about 4 miles of range per day (unless i drive much longer and start using up the lifepo4 battery which is rare). the thing is, the volt normally gets about 30mpg, and that's equal to about 8kwh. so by saving about 800watts per day= 0.13gal gas saved = $0.54 in my area. the solar panels cost 70$ and paid for themselves in about 4 months. now theyre just free and keep saving me gas.

Can i use two different type of scc on a 200 Ah lifepo4 batteries if so do you have diagram ? And how to calibrate?

how would you conect one solar panel 30V, max 13A and one panel 20V max 8A in paraler ?

not true !! I run one deep freeze and one frige on 3x 500 watt DJ pannels conected parelell and one 3 k watt 24 volt Mecer inverter with 4x80 amp 674c lead acid car battries.Freezer is a model DD1-33-2 A++ Upright 212 litre volume and 190 watt hour. Refrigerator Defy A++ model DL1-45-2 volume 335 uses 106 watt per hr.

Only 3 days without sun? Clearly you've never been to Seattle.

Is that the required battery sizes if you run the inverter at max power? If your load is only say 200A (a fridge and some lights) you won't place a big draw on the battery, mostly inverter on idle.

Good share Bro!

Excellent video on the difference between high and low frequency inverters. Low frequency make a much better choice for real world use.

One reason the low freq inverter is "better" for heavy inductive loads is that the big heavy power transformer, being a huge ball of wire, is nearly indestructible from a short overload. If the device trying to start ( ie: air conditioner, table saw, freezer, etc.) approaches the output limit of the inverter, a voltage sag will be the result and a trip condition may result. A hi freq inverter, when subjected to a similar load, will try it's hardest to fight off the surge and make the device happy while actually failing and blowing up all it's MOSFETS trying! No different than vacuum tube circuits VS transistor counter parts!

Can you use a bigger inverter if you add more batteries in parallel

Very professional and good information. Thoughts on a Precision Circuits LI battery isolation manager vs B2B??

I like it

Are you working for victron?