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Or look into evacuated tubes and a cylinder setup if there is just two of you, you could maybe get by with both of you sacrificing some shower time etc you’d probably need an unvented engineer with solar experience though.

I think you’re correct could be making the motor work that bit harder.

Yeah that is true it surprises me as well, it’s tagged at 550watt on the fan but shows more on the clamp meter, it’s not even that old either.

Ok awesome advice thank you. I take it I can get 8S BMS’? I’ve only used 4s which was the same as the overkill branded one

Yeah I agree I could diy two 12v batteries with their own BMS’ I have some experience with it so shouldn’t be an issue, just cost and wait times. My planned system voltage is 24v Also I’ve added the links into the post above

I never even knew about high frequency and low frequency inverters, managed to find this one 9kw peak for a a few seconds. https://www.ebay.co.uk/itm/112496420845 Also just found this one which is similar but need to look at reviews etc...

That’s a really good point, I overlooked that, thank you.

It’s not massive but it’s bigger than what you see in average domestic setting. It has a 6” duct on it which goes over the exhaust of the car to expel fumes while the cars warming up.

If I DIY the battery which is a possibility if I go lithium I could potentially have a look in the BMS settings. But I think for ease and more of a fit and forget, I might go acid. Do we have any recommendations for an inverter?

Oh course the efficiency makes sense. so would my inverter have to have a continuous rating high enough to cover the surge of the motor? My inverters going be huge.

Ah I never knew that, would I find that in the specs of the battery chemistry?

With regards to the surge current, do the batteries have to be sized to suit the temporary discharge from batteries because of the surge? For example a 170ah battery at minimum to cope with the 1c discharge of a 170A surge

What’s the conversion factor if you don’t mind me asking? I haven’t picked an inverter yet, thinking a 3kw with a 5kw surge should be plenty. I’ve seen an epever upower which should fit the bill but I’m always open to any better suggestions.

Hi again I’m back, I got a surge current clampmeter and it’s confirmed the motor surges up to 14A on startup before dropping down to 4A on 230/240v So that gives me a 3.5kw surge Which off a 24v battery bank is 140A? Am I correct in this? Any help appreciated

thank you, as im waiting for this clamp meter ive been having a look about online and im not convinced im going to get an inverter that can handle these motors. The really big inverters seem to be for 48v systems. Potential costs are rocketing. re: LED lights, yeah i thought that aswell, clamp...

I’ve ordered a budget inrush meter to measure and will add 15-20% as well. Thanks mate Does everything else look correct? I’ve seen some 385watt panels that I’m thinking I could use, I can use them on a 24v system if my SCC can handle the VOC, right?

Thanks for your reply, do I have to be this precise could I not add a factor in with an equation to cover it? The 1200watt exhaust fan has a rated wattage of 550watt but when I clamped it it’s pulling a steady 4.6A at 240v.

Hi guys, new here, have a bit of experience building small systems but would like to run some numbers through you guys if you’d be so kind to read through them and point out where I’ve gone wrong or could be designed better So basically this system is to run a detached garage for a car The...