230v appliance (Incinerating toilet) with sw4048 120/240?

kakarot

mike95490 said:

Are there any trees around  ?  ( for the men ) boiling water away is a hugely inefficient way to use solar power

Yes, plainty of trees around, I got a DIY urinal for ladies.

How many batteries do you guys think?

 I currently got two 12v AGM 203 watts each.

Estragon

With 200ah@12v batteries, you could do 2 strings of 4 batteries (eight total) for 400ah@48v, ~19kwh.

That gives ~3days autonomy at 3kwh/day to 50% state of charge.  4kw of pv should be enough to recharge from 50% SOC in most climates.  Whether 3 days autonomy is enough to avoid going below 50% SOC with no alternate means of charging, I don't know.  

If the climate is such that there are longer runs of gloomy weather, the bank could be bigger and/or a generator added.  If using a larger bank, I'd use lower voltage / higher amp-hour batteries to keep the number of strings to one or two.

kakarot

So eight batteries could do it.

I plan to get lithium later.

mike95490

kakarot said:

So eight batteries could do it.

I plan to get lithium later.

I'd say look into the loveable loo :

https://www.treehugger.com/lawn-garden/a-composting-toilet-for-195-the-loveable-loo-video.html
https://www.milkwood.net/2012/08/17/building-a-jenkins-style-lovable-loo/ 

  There are free plans for many loos built around a 5 gallon bucket, using sawdust, peat moss or other materials.

After years of alternatives and trying all sorts of ideas, the bucket, a seat platform, and a scoop of dry carbonaceous is the real deal,

until you get a flushing septic system in place.

littleharbor2

mike95490 said:

kakarot said:

So eight batteries could do it.

After years of alternatives and trying all sorts of ideas, the bucket, a seat platform, and a scoop of dry carbonaceous is the real deal,

until you get a flushing septic system in place.

From experience I might add, If you can acquire a 7 gallon bucket you might prefer it to the shorter 5 gallon variety.

kakarot

Now I got 8 x 110Ah AGM batteries.

 I will make two 48v banks   and then connect them in parallel

48v 110 Ah x 2    = 48v 220Ah

 I guest that would give me 10kwh

More than enough to run this toilet by 3 people every day.

kakarot

Update:

I've got 12 Gel batteries

12v each

110Amp  each

All setup to make 3 banks of 48v  = 330Amph @ 48v

330Amp x 48v =15840kwh

15840kwh / 2  = 7920 kwh

7920kwh at 50% of battery use

I've got the cheap chinese inverter/charger  5kw, 80amp, 48v

tested the toilet  which is at 230v, all is working it burns a banana to ashes so i guess all good.