|
|
Post by oguz on Jan 11, 2021 8:40:39 GMT
Hi all,
do you know the power consumption specs of the fridges in J51 for a) galley fridge b) utility room fridge c) cockpit fridge
Thank you very much
Oguz
|
|
|
|
Post by jy51 on Jan 11, 2021 10:32:52 GMT
Hi all, do you know the power consumption specs of the fridges in J51 for a) galley fridge b) utility room fridge c) cockpit fridge Thank you very much Oguz A lot! Sorry I really don’t know the precise figures but on my J51 I have the utility room top loader fridge, the galley front door opening fridge with ice box and a draw freezer, all running on 12 volts supplied by three lithium batteries and a 216W solar panel. At anchor our normal daily usage, includes an inverter to run a coffee machine, orange squeezer (fresh orange juice everyday) and a hair dryer. Other 12 volt items include electric toilets, water pumps, instruments, lighting, phone and iPad charging. To maintain our Lithium at a level of fully charge, it takes an hour plus of running our generator, every morning, which is convenient because at the same time we make water to top up the tanks and can heat the water for our long showers. |
|
|
|
Post by oguz on Jan 11, 2021 10:54:03 GMT
Thank you.
I have 3 lithium batteries as well. and a solar with capacity of 345W. I have 3 refrigerator; one in galley w/o a freezer compartment, one top loading in the utility room and 1 in cockpit. Do you happen to know yours Amp/h or daily usage or Watt specs. I am assuming they will run all day and trying to calculate how much they would drain theye batteries.
I also like to install a watermaker but thinking about 12V spectra and specs are 19Amph. I need to run this 2h/daily to top up my tanks.
My goal is to run generator every other day or even every 3days if possible and run as long as possible on batteries. hence i am trying to carefully calculate teh power consumption to understand if I need to add more Lithum capacity ?
|
|
|
|
Post by Zanshin on Jan 11, 2021 11:55:03 GMT
The power consumption depends very much on where you are. I am in the Caribbean and the refrigerator and freezer are, by far and away, the biggest power consumers. The freezer is keel-cooled, but the waters are 27°C so there isn't as much efficiency as there would be in colder waters. The units are designed with european use in mind, plus insulation adds costs and takes up valuable room. I did some measuring of power consumption here. That also shows when I charge the batteries using engine, generator or solar. The Spectra watermaker is surprisingly efficient, but it is much better to run it less frequently but for much longer. If I run it for 2 hours it makes about 120l, but then flushes away at least 12l of that during the cleaning. That is a loss of 10%. If I run it for 4 hours then my loss is only 5% of product. |
|
|
|
Post by jy51 on Jan 11, 2021 12:41:46 GMT
Thank you. I have 3 lithium batteries as well. and a solar with capacity of 345W. I have 3 refrigerator; one in galley w/o a freezer compartment, one top loading in the utility room and 1 in cockpit. Do you happen to know yours Amp/h or daily usage or Watt specs. I am assuming they will run all day and trying to calculate how much they would drain theye batteries. I also like to install a watermaker but thinking about 12V spectra and specs are 19Amph. I need to run this 2h/daily to top up my tanks. My goal is to run generator every other day or even every 3days if possible and run as long as possible on batteries. hence i am trying to carefully calculate teh power consumption to understand if I need to add more Lithum capacity ? Sorry again, I do not yet have the equipment to monitor to this level. But I do have the French made water-maker called Dessalator duo, it runs on 12 volts or 220 volts and produces 60 litres per hour. To keep my water tank more or less full I need to run my generator for one hour every day. Alternatively, when passage making and running the motor, I always make extra water to keep the tank full. We are not full time live-a-boards, but spend about 5 to 6 months cruising every summer, running my generator for one hour each day is not a big issue for me and it is sufficient to cope with all my needs. My solar wattage was dictated by the size of the space forward of the mast, I didn't want a structure fitted at the stern and I didn't want panels stuck on top of the bimini. By chance, I found a solar panel made by an Italian company called Solbian, the range I chose was their Super Rugged flexible marine. Their 216W panel 1364 x 996 fits perfectly on the area forward of the mast with the cables running down the same deck fittings as those that come out of the mast. (This might be a solution for you to increase your solar) |
|
|
|
Post by jy51 on Jan 11, 2021 13:34:13 GMT
The power consumption depends very much on where you are. I am in the Caribbean and the refrigerator and freezer are, by far and away, the biggest power consumers. The freezer is keel-cooled, but the waters are 27°C so there isn't as much efficiency as there would be in colder waters. The units are designed with european use in mind, plus insulation adds costs and takes up valuable room. I did some measuring of power consumption here. That also shows when I charge the batteries using engine, generator or solar. The Spectra watermaker is surprisingly efficient, but it is much better to run it less frequently but for much longer. If I run it for 2 hours it makes about 120l, but then flushes away at least 12l of that during the cleaning. That is a loss of 10%. If I run it for 4 hours then my loss is only 5% of product. Zanshin, you talked about the back wash on your water-maker, is this an automatic operation? On the Dessalator duo, the fresh water wash is a manual operation that can be preformed at any time for any duration. If I am cruising, then the water-maker gets used almost every day, therefore no need to wash out the system. If I spend long periods in a marina I flush the water maker with fresh water for at least an hour which with a shore water connection is not an issue. When laid up for the winter I use a winterising solution. |
|
|
|
Post by oguz on Jan 11, 2021 14:03:26 GMT
Thank you. I have 3 lithium batteries as well. and a solar with capacity of 345W. I have 3 refrigerator; one in galley w/o a freezer compartment, one top loading in the utility room and 1 in cockpit. Do you happen to know yours Amp/h or daily usage or Watt specs. I am assuming they will run all day and trying to calculate how much they would drain theye batteries. I also like to install a watermaker but thinking about 12V spectra and specs are 19Amph. I need to run this 2h/daily to top up my tanks. My goal is to run generator every other day or even every 3days if possible and run as long as possible on batteries. hence i am trying to carefully calculate teh power consumption to understand if I need to add more Lithum capacity ? Sorry again, I do not yet have the equipment to monitor to this level. But I do have the French made water-maker called Dessalator duo, it runs on 12 volts or 220 volts and produces 60 litres per hour. To keep my water tank more or less full I need to run my generator for one hour every day. Alternatively, when passage making and running the motor, I always make extra water to keep the tank full. We are not full time live-a-boards, but spend about 5 to 6 months cruising every summer, running my generator for one hour each day is not a big issue for me and it is sufficient to cope with all my needs. My solar wattage was dictated by the size of the space forward of the mast, I didn't want a structure fitted at the stern and I didn't want panels stuck on top of the bimini. By chance, I found a solar panel made by an Italian company called Solbian, the range I chose was their Super Rugged flexible marine. Their 216W panel 1364 x 996 fits perfectly on the area forward of the mast with the cables running down the same deck fittings as those that come out of the mast. (This might be a solution for you to increase your solar) you are rıght this maybe the solution for additional Solar power. do you have by any chance picture of your solution. Also another question have you considered adding additional Lithium batteries on top of the 3 you have. Has anyone done that I wonder if space allows it and current alternator can cope with 6 of them together. I have upgraded to additional 60Amph charger |
|
|
|
Post by Zanshin on Jan 11, 2021 19:01:20 GMT
The Spectra has an automatic "flush" after running. I have 250W of Solbian panels on my dodger, and another 250W on top of the bimini, and another 250W glued on the forward deck. All are Solbian panels and each is on its own PWWM controller.    |
|
|
|
Post by oguz on Jan 12, 2021 7:40:15 GMT
Thank you for the pictures . very nice setup. I will definitely consider
|
|
|
|
Post by jy51 on Jan 12, 2021 9:25:22 GMT
I can’t see any reason why you can’t increase your lithium battery domestic bank.
I am thinking of using the free space beside the three installed by the factory to add a fourth.
I suppose the space under the VIP berth dedicated to more AGMs could facilitate two more Lithium batteries. But considering the price per battery, is it worth it? To take full advantage of 6 of these Lithium batteries, with their ability to discharge further than normal wet batteries, will require a considerable amount of recharging, especially if you intend to take advantage of their ability to maintain full voltage at a low state of charge.
I too have upgraded to the 60 and 40 Amph battery chargers but I sincerely believe these and your solar would not be sufficient if you had six of these lithium batteries.
As long as your current batteries can cope with a nightly discharge and recover to a fully charged state with the solar charging during the day you don’t have a problem any short full to be made up by the generator. If I doubled my solar I believe I would only need to utilise my generator every other day but then I would still need my generator to make water.
Once I find the picture and learn how to up load it I will send the one showing the solar panel installation.
Im a little surprised with the Spectra water maker having only the automatic back wash, it seems like over kill to me and a waste of water.
|
|
