Using a ebike battery as a mains power supply

[Bruce6789]

Hi all,
I've a couple of 12Ah 36v Yose power batteries and was looking for a contingency plan just in case the utility companies can't do their math right (know what I mean?). Seems to me it would have occurred to a few other people and there might already be a thread some where... I'm aware of stuff like this :
WGE 36V DC Power Inverter To 220V AC Converter, AC Socket Car Inverter,500W : Amazon.co.uk: Electronics & Photo but was thinking it looks a bit iffy with a dc-dc converter on the front end. Also concerned about how it would handle start up current on things like fridges and central heating pumps. Anyone mulled this one over?
Cheers,
Bruce.

 

[Benjahmin]

The sums just don't stack up. A 36v 12Ah battery is 432Wh, so 2 batteries will give you 864Wh, nominal .
Allowing for conversion losses in any inverter you're going to see 800Wh maximum, and that would be draining the batteries - never a good idea if it can be avoided. So a useful output of 600Wh.
Central heating pump about 40W but what about the boiler and the motorised valves - these are permanantly taking power when open.
Fridge freezer 100-150 W.
Given the cost of inverter etc and the inconvenience of connecting said items !?
It's something I've been looking at in this thread

Investigating Lithium battery generators

Given the increasing possibility of power outages this winter, and possibly beyond, I have decided to start looking at some sort of power backup so I don't loose all the lovely garden produce I've managed to freeze this summer. Firstly, I'm aware that these things are mis-named in that they are...

www.pedelecs.co.uk

 

[Bruce6789]

Thanks for the link, I'll follow that thread.