Crossy

Yeah, but they really are men!

General wisdom is that an AC rated switch can handle about a tenth of the AC voltage rating on DC. These knife switches have a large contact clearance so are probably capable of a much larger AC voltage than they're rated for (insulation notwithstanding). Move it briskly when swapping and give it a try.

Yeah, no issues doing that. You could also run the two poles in parallel for extra safety margin.

Great minds and all that carp ???? It's not rated to actually switch DC, but if the load is small when you switch, I reckon it will be the cheapest way to go.

Daft thought. Do your BMS's have an on-off switch you can use to isolate one or other pack?

Also, do you have a separate charge controller and inverter or an "all in one" inverter and charge controller?

Are you intending charge and discharge via this switch? Manual changeover or auto? Will it need to switch whilst under load?

It's worth noting that our OP has LiFePO4 batteries.

Yeah, if the drain is blocked and you have a shop-vac (wet-n-dry) you can sometimes clear by sucking on the outside end of the drain. Do not blow or you may end up with a load of stinky water in your room ????

We listen to our members ???? Sometimes Same place, just a different name.

Menu here https://magicpin.in/Hyderabad/L-B-Nagar/Restaurant/Eat-Cock-Resto-and-Jail-Mandi/store/448637/menu/

My friends at https://www.facebook.com/groups/thai.species.id/ say he's a Cox's Mud Snake (Homalopsis mereljicoxi) not dangerous.

I'm 99% sure it's 2.4 x 1.2 m or thereabouts in a myriad of thicknesses and qualities ranging from "marine" to "shuttering". You really need to go and look at what they have and pick something suitable. @sometimewoodworker is your man.

I'll move this to The Pub I think.

Probably older than I am ... University lecturer - "Have you completed your experiments with pendula?" Student - "Yes, we are now sat on our ba, doing our sa". Fetching my coat ...

Many moons ago I was working in the RN calibration lab, at Monks Park in darkest Wiltshire, calibrating AVOs. We had an AVO come in for cal. still in its "leather" case, slightly unusual but not unknown. Upon opening the case we found out why, inside was a kit of parts that had been, at one time, most of an AVO. It turned out that Jolly Jack Tar was servicing a radar antenna and had "accidentally" dropped his AVO off the mast. Contact with the rather unforgiving steel deck converted said unit into a kit. It was apparently less career-limiting to just send it for cal. than to report it damaged.

Just to confuse: - The MEA area (Bangkok) is 230V nominal. The PEA area (everywhere else) is 220V nominal. Both are supposed to be +-10%.

No worries, these things happen. It wouldn't be the first time someone has been misled by faulty test gear (this t-shirt I have). But 238V is still rather high (220V +8%) so it's worth keeping an eye on it a low load times (middle of the night), just in case it gets excessive.

https://www.lazada.co.th//products/i2054292693-s6700658526.html

I before e ???? But the main reason is that we in the west, are really over-cautious on the "kill-everything remotely harmful" front, so when something remotely-harmful comes along we get sick. Meanwhile, after a few years in the far east / tropics we become used to the local bacteria and they don't affect us, whilst the poor tourists spend their holiday in the bathroom** ** Useful fact, I found the bathrooms in the Museum Inn, Bangalore had an ideal design. You could sit on the pan and throw-up in the sink without moving. It would seem that India has rather different bugs to those found in Thailand

A couple of posts removed. Do I really (really) need to say why??

On recommendation from another forum, I bought one of these $70 chaps. https://www.aliexpress.com/item/1005003755306962.html Believe it or not this little guy is a 3kW (yes you read that right) power supply cum battery charger. Got a 5A charger? Pffft! This chap will bang out up to 60A (assuming of course your pack can handle that charge rate). Available with various pre-programmed voltages (all around a nominal 48V although I understand there's a 24V version) or set it yourself via the CANBUS interface up to 60V. Built like the proverbial brick outhouse these are designed for long service, not new but for the $$$ buy two.

Yeah, those really tiny ants like electric fields for some reason, and crushed ones are a pretty good insulator when they get inside switches.