Jump to content
Sign in to follow this  
Féte

Inverter and batteries for coffee van

Recommended Posts

Hi just wondering is any one can help me. 
we run a coffee van which we use an Generator atm and mains power but we are looking at getting an inverter and running it off 12v batteries. I’m just wondering if any one can help or Recommend batteries and inverters. Our coffee Machine is duel fuel so runs off gas so there’s not much being pulled from that a  mazzer major grinder which is about 850 I think fridge , freezer and flow jet water pump and lights but there only led 

we are running around 2500 watts at one time 

 

thanks in advance for your help 

Share this post


Link to post
Share on other sites

First you need to work out how many Amp hours of battery capacity you are going to need. Amps = Watts / Volts. Look at how many hours everything is going to be running for and how you are planning to charge the batteries. The fridge/freezer may only be running around 20% of the time, depending on the model. If the van is regularly driving long distances, charging the battery off the alternator is simple and cheap to set up. If you are going to be using it in the same place for a while without driving long distance or having a mains supply, you are going to need to charge the batteries by the generator or some other means (e.g solar).

If you go for a lead acid or AGM battery, you will kill the battery if you discharge it more than 50%. You don't really want to be discharging more than 30% regularly so you'll have to size your capacity accordingly.

If you get a LiFePO4 battery, you can use close to the full capacity without damage. On the downside, you must keep the battery above 0°C at all times when charging or discharging or you'll damage the battery. Also, they are a lot more expensive to purchase but also smaller and lighter.

For the inverter, work out what your peak wattage is going to be, then build in a bit of spare capacity. Expect the inverter to be about 90% efficient. The peak wattage of some appliances when starting up may be a lot higher than the continuous wattage so make sure you plan for the peak. Make sure you get a pure sine inverter rather than a modified wave inverter if you plan to use any sensitive appliances. This may include grinders, I'm not sure. There are lots of reports of cheap inverters failing well below their stated wattage or breaking after a few months.

I use an Edecoa pure sine wave inverter in my campervan and have been happy with it but my use is very different to yours so I can't really offer advice on specific inverter or battery models for you. In normal use, I run a grinder a few times a day, some LED lights, charge a laptop, phones, speakers and a few other bits and bobs. I also have solar panels and can charge off the alternator so I don't really have to worry about running out of charge (I don't have a mains hookup). I have also run drills, jigsaws, circular saws and sanders off it with no problems.

Don't forget to make sure all your wiring, fuses etc are also up to the job. You'll probably also want a suitable charge controller with something to monitor your battery levels and input/output.

The guys over at www.12voltplanet.co.uk are always really helpful at talking through which options would be best suited to your needs. There are cheaper shops though. Self build campervan forums and guides are useful too.

Hope some of that was helpful, apologies if it's teaching you to suck eggs.

  • Like 1

Share this post


Link to post
Share on other sites

Hi thanks for you reply! 

im thinking I’m going to need a 2000w to 4000w peak I’ve worked out I will be running around 2500 watts on and off for around 3/4 hours a day what would the best ah battery’s be that could handle that time frame with out dining one me 

ive been looking everywhere :( 

 

thanks 

Share this post


Link to post
Share on other sites

I have a similar set up with a dual fuel machine. I use a leisure battery manufactured by Leoch. I think it is 150 amp hour of the top of my head.

It works well although I only run the machine and grinder from it so I will not have as high of a draw as you will.

I made the mistake of buying a cheap inverter and cheap charger. Big mistake they soon failed.

Just pay up and look big for the good stuff first time around! It will be less expensive in the long run.

SDM has given you some great advice, perhaps speak to the company he suggested and get them to spec up a system for you. They will know exactly what is what.


www.blackcatcoffee.co.uk

Coffee | Equipment | Accessories | Service & Repair

Fracino | Eureka | Motta | IMS

Share this post


Link to post
Share on other sites

I've just set up and have a dual fuel machine. I'm trying to work out the power requirements, the machine is 3000W but we will use as dual fuel so I expect the machine to be using a lot less power. I'm not sure how much to factor into my calculations though, Black Cat Coffee - what do you factor in?

 

 

Share this post


Link to post
Share on other sites
8 minutes ago, thesmartcoffeeco said:

I've just set up and have a dual fuel machine. I'm trying to work out the power requirements, the machine is 3000W but we will use as dual fuel so I expect the machine to be using a lot less power. I'm not sure how much to factor into my calculations though, Black Cat Coffee - what do you factor in?

 

 

The machine does not draw an enormous amount when on gas, perhaps 50w. The Flojet draws 50w. The machine pump top out at 300w then factor your grinder, mine is a Compak K6 and is 240w.

Total 640w.

Plus some overhead.

We went with a 1000w continuous 2000w peak inverter.

After our initial crappy quality inverter died we haven't had any problems with this specification using quality stuff.

 


www.blackcatcoffee.co.uk

Coffee | Equipment | Accessories | Service & Repair

Fracino | Eureka | Motta | IMS

Share this post


Link to post
Share on other sites

thanks so so much that's really helpful.

when you say the machine only draws 50w when on gas  - do you mean when it is stationary and not in use? then additional 300w when in use?

have you factored in 640w being at total capacity? as opposed to using a % based calculation depending on when the machines are in use?

 

what battery do you use with the inverter?

 

Share this post


Link to post
Share on other sites
17 hours ago, thesmartcoffeeco said:

thanks so so much that's really helpful.

when you say the machine only draws 50w when on gas  - do you mean when it is stationary and not in use? then additional 300w when in use?

have you factored in 640w being at total capacity? as opposed to using a % based calculation depending on when the machines are in use?

 

what battery do you use with the inverter?

 

The machine draws very little when on but idle say 50w. When running on gas all the machine draws is power for the pcb, solenoids and flow meters so not a lot. The 300w figure is for when the pump kicks in and the machine is brewing or refilling the boiler.

640w is for me my total possible draw. I cannot comment what yours will be as you would need to find the wattage of your grinder.

I use a Leoch LAGM 130 battery.

Perhaps have a chat with some specialist who can properly advise you. You do not want to end up with stuff that is unsuitable.


www.blackcatcoffee.co.uk

Coffee | Equipment | Accessories | Service & Repair

Fracino | Eureka | Motta | IMS

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

  • About
    Coffee Forums UK is the UK's premier coffee forum Started in June 2008 by Glenn Watson, we now have more than 24000 mainly UK based members, and welcome more than 3000 members and visitors from around the world each day! With strategic investment and digital expertise from the Jackson Lockhart team (Tait Pollack and Adam Bateman), we are taking Coffee Forums UK to the next level, and are delighted to share the journey with you.

    New Members:
    We are often referred to as the friendliest forum on the web and we look forward to welcoming you onboard. Please read our Terms of Use. We stick by them, existing members please familiarise yourselves with them.

    Advertising

    Coffee Forums Media Kit

    Click Here To Buy Advertising Space 
    £100 p/m when paid yearly, up-to: 690000 banner impressions per month!

     

    coffee-subscription-mini.png

    Become a friend of CFUK
    Buy Us A Monthly Coffee (massive thank you!) 

     

    Donate / Sponsor

    Click Here To Donate (big thank you!)

    Get Your Supporter Badge Today (per year)

    image.png



    Coffee Forums Logo
     

×
×
  • Create New...