Why? A few minutes in a 700w microwave would be sufficient. I have a 560AH lifepo4 battery pack that can happily discharge 1C rating if necessary, so i'm not sure of the problem you are implying. Please elaborate?hope you've got another means of cooking yer porridge!
Simply your location - you're right though - a few mins is fine, but winter yield is just so miserable in the UK winter, and worse for Scotland. Substitute porridge for chicken broth!Why? A few minutes in a 700w microwave would be sufficient. I have a 560AH lifepo4 battery pack that can happily discharge 1C rating if necessary, so i'm not sure of the problem you are implying. Please elaborate?
Set up is for a diy camper coach, which will only be used spring till autumn. Care to comment on my fuse sizes as i'm a bit unsure on this?Simply your location - you're right though - a few mins is fine, but winter yield is just so miserable in the UK winter, and worse for Scotland. Substitute porridge for chicken broth!
The microwave would only be used very sporadically and would always be disconnected between uses. My BMS would give an indication of battery capacity or highlight any problems with the cells hopefully....so a BMS disconnection of the main inverter would set off alarms and hence you would not switch on the microwave in these circumstances. I simply felt the microwave draw was a lot to ask of the main inverter, when other items were running in the background.The only problem I see is that the inverter for the microwave has no shut off if the battery is out of spec. Low Voltage on a cell etc.
Have purchased a chargery unit....to have the relays wired directly to the remote on/off switching on the units...no need for seperate relays or contactors at all. I like the fact you have control, without all those amps having to pass through the unit....so a great back up to the victron units doing the main controlling jobs.What BMS are you planning to use?
I wonder if the second inverter for your microwave as necessary, the Victron is quite capable, and as you have already noted, Microwave usage is flexible and on demand and can be tailored to the situation. What other high power devices will you be running on your main inverter that the microwave could conflict with?
I might still do that....depending on final loads etc. Thanks.A 700W rated output microwave is going to consume closer to 1100W. They're grossly inefficient. On that modified, it might be loser to the 1500W max.
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Why not a cheap box store microwave and the mutiplus? WAY better option.
Lastly, you're not over-sizing your MPPT. 740/12 = 62A.
Have purchased a chargery unit....to have the relays wired directly to the remote on/off switching on the units...no need for seperate relays or contactors at all. I like the fact you have control, without all those amps having to pass through the unit....so a great back up to the victron units doing the main controlling jobs.
I will also be powering a macerator(400w infrequent use), two water pumps, led lighting combined with extractor fans in toilet and kitchen area(if the light is on then it is extracting at the same time...important to me to keep moisture levels low), fridge(constant draw), 400w heater (sporadic), socket for charging purposes(phones primarily), but occasionally, may run a toastie maker or very small kettle as well. Yes it could probably be managed off the main inverter, but would be a lot of faffing about?
The more i read you folks input, the more i'm coming around to the idea of having a single higher amp socket off the distribution box, which can either have the microwave/heater/toaster/kettle plugged in. The water pumps are low wattage(22W) and only need operate when running fresh tap water or using a recirculating shower....so again sporadic use. It would also mean i keep the discharge rating lower at any given time as well....Thanks for the input.So long as you would be willing to not use the microwave, toaster, and kettle simultaneously, I suspect you could use any 1 of those devices with the rest of your loads at the same time. Particularly if your fridge and micro are efficient inverter style units. Though the water pumps are wildcards, what sort of pumps/power draw do you expect?
The victron multiplus 3k can handle 2400W continuous, 3000W for 30 minutes, 6000W for up to 2 minutes (surge rating, not meant for normal usage).
This sounds like a good idea!The more i read you folks input, the more i'm coming around to the idea of having a single higher amp socket off the distribution box, which can either have the microwave/heater/toaster/kettle plugged in.
I'm curious to hear more about the recirculating shower if you don't mind sharing. I've been considering the pros and cons of this sort of system recently.The water pumps are low wattage(22W) and only need operate when running fresh tap water or using a recirculating shower....so again sporadic use. It would also mean i keep the discharge rating lower at any given time as well....Thanks for the input.
I totally agree, which is why I love this forum and others like it!Sometimes simply discussing these things with folks makes choices much clearer.
Are you recirculating the actual water, or just the heat? Is it to save water or power?I'm curious to hear more about the recirculating shower if you don't mind sharing. I've been considering the pros and cons of this sort of system recently.
The recirculating shower is simply to use as little water as possible, but still have more the a two minute shower. The run off from the shower is passed through a basic canister sponge filter(each user has there own sponge & disinfected in milton between uses). A small pump simply pushes the water flow back through the shower head. If you start off with 0.6 litre of water boiled from microwave and you add it to 1 litre of cold water, you can then prime the whole system with approx 1.5 litre of 40 deg c (approx) shower spray. After a days hiking in the hills, a spray down and a rub with a sponge using nice warm water...is a luxury....lol. You can stay under the shower till the water turns too cold, or you can have a jug of warmer water in the shower to 'top up' the heat. Not perfect....but beats carrying gallons of water for showering.This sounds like a good idea!
I'm curious to hear more about the recirculating shower if you don't mind sharing. I've been considering the pros and cons of this sort of system recently.
I totally agree, which is why I love this forum and others like it!
Joey, if you could indicate the wire sizing for the inverter to battery (say 600mm length) i'd be grateful. I was thinking of using 600A welding cable, but wasn't sure of the continuous use rating? I dont expect to draw anywhere near that current, but i'd rather spend a bit extra on wiring than be unsure. ThanksProper wire sizes are essential.
If you share we can vet.
Recirculating shower refers to the water supply in my experience.Are you recirculating the actual water, or just the heat? Is it to save water or power?