I'm planning on a 12v 280Ah system, and want to run some 240v equipment- the most demanding being a 1600w induction hob. So I'm planning on running a 2000w PSW inverter at least. Ideally I'd like to be able to run as much 240v as the batteries can safely take, but 1600w is the bare minimum.
I'm trying to work out the most cost effective way of hooking up the inverter. In no particular order, and not necessarily mutually exclusive, I think I can:
- have a suitably beefy BMS with the current running through it, e.g. 250A
- use a smaller BMS to trip a beefy relay cutting all of the loads- possibly a SSR (cheap and nasty?)
- use the BMS to trip the inverter itself, if it can do that. Or hack the switch on it if not.
- use the inverter's inbuilt voltage detection (yes i know this is not cell level, so it would just be a secondary layer of protection)
- fit a device on the 240V side of the inverter, still triggered by the BMS, to cut the output- could be nice and cheap because of much lower current- not sure what this would look like but it sounds promising.
I could also fit a couple of inverters, say a 2kw and a 1.5kw, which would make the individual relays cheaper but also makes things a lot less flexible.
So which of the above options would be best? I am hoping to use a pretty cheap inverter but I could be persuaded to upgrade that to something that has clever protection features that save me buying big expensive relays.
Thanks for any suggestions...it's easy to get overwhelmed with these decisions.
I'm trying to work out the most cost effective way of hooking up the inverter. In no particular order, and not necessarily mutually exclusive, I think I can:
- have a suitably beefy BMS with the current running through it, e.g. 250A
- use a smaller BMS to trip a beefy relay cutting all of the loads- possibly a SSR (cheap and nasty?)
- use the BMS to trip the inverter itself, if it can do that. Or hack the switch on it if not.
- use the inverter's inbuilt voltage detection (yes i know this is not cell level, so it would just be a secondary layer of protection)
- fit a device on the 240V side of the inverter, still triggered by the BMS, to cut the output- could be nice and cheap because of much lower current- not sure what this would look like but it sounds promising.
I could also fit a couple of inverters, say a 2kw and a 1.5kw, which would make the individual relays cheaper but also makes things a lot less flexible.
So which of the above options would be best? I am hoping to use a pretty cheap inverter but I could be persuaded to upgrade that to something that has clever protection features that save me buying big expensive relays.
Thanks for any suggestions...it's easy to get overwhelmed with these decisions.