Back up power

[rusty dowell]

My new back power
I’m planning on having it to just run my return pump and siphon pump. I figure it will run for 8 hours. The pumps will be plugged in the battery and the battery plugged in all time.
Does anyone see any issues?

 

[FindinNemo]

Hey there, I don’t see any issues, I think personally this is a great system! If you want to calculate your load and how long the battery will last for I’ve attached a few quick points and formulas I used;

1. Determine the Power Consumption of Each Consumer​

• Each pump will have a power rating, usually in watts (W) or kilowatts (kW). Check the pump labels, user manual, or datasheets for the power consumption.

If the power rating is in amps (A) and the voltage (V) is known (e.g., 120V or 240V), you can calculate the wattage using the formula:

Power (W)=Voltage (V)×Current (A)Power (W)=Voltage (V)×Current (A)
If the power rating is given in watts (W), you can skip this step.

2. Calculate Total Power Consumption​

• Add the power consumption of both pumps:

Total Power (W)=Power of Pump 1 (W)+Power of Pump 2 (W)Total Power (W)=Power of Pump 1 (W)+Power of Pump 2 (W)
For example, if Pump 1 uses 500W and Pump 2 uses 400W, then:

Total Power=500W+400W=900WTotal Power=500W+400W=900W

3. Check the Backup Power Source Capacity​

• You need to know the total energy available in your backup power source, often measured in watt-hours (Wh) or kilowatt-hours (kWh). This might be listed as the battery's capacity. For example, if you have a 12V battery with a capacity of 100Ah:

Energy (Wh)=Voltage (V)×Capacity (Ah)Energy (Wh)=Voltage (V)×Capacity (Ah)
For a 12V, 100Ah battery:

Energy=12V×100Ah=1200WhEnergy=12V×100Ah=1200Wh

4. Calculate How Long the Backup Power Will Last​

• Finally, calculate how long the backup will last by dividing the total energy available in your backup source by the total power consumption:

Runtime (hours)=Energy Available (Wh)Total Power Consumption (W)Runtime (hours)=Total Power Consumption (W)Energy Available (Wh)
For example, if you have 1200Wh of backup energy and the total power consumption is 900W:

Runtime=1200Wh900W≈1.33 hours (1 hour and 20 minutes)Runtime=900W1200Wh≈1.33 hours (1 hour and 20 minutes)

Summary Formula:​

Runtime (hours)=Battery Capacity (Wh)Total Power Consumption (W)Runtime (hours)=Total Power Consumption (W)

Take care!

 

[rusty dowell]

Thank you
I plugged in the pump and the siphon pump on the battery and ran for about eight hours
I’m pretty good with that. I just wasn’t sure about leaving that battery plugged in to the power source at all time.

 

[FindinNemo]

Definitely, I know trickle chargers are good for constantly leaving a battery plugged in to keep the overall battery health high but not nesscesarry depending on the type of battery. Maybe possibly look into this?

 

[Eric R.]

My new back power
I’m planning on having it to just run my return pump and siphon pump. I figure it will run for 8 hours. The pumps will be plugged in the battery and the battery plugged in all time.
Does anyone see any issues?

A good way to test a battery backup is to just unplug the backup and see how long it runs for and monitor the tank to see how it does on just battery backup. Don’t leave anything else running that’s not plugged into the battery. Basically just a test run. Do this when you can be around the whole time to check on the tank regularly.

I just picked up two EcoFlow units on a Black Friday deal. Did you download the app to setup the battery? If so, make sure this setting is set to on, for some reason it’s set to off by default.

 

[Eric R.]

Definitely, I know trickle chargers are good for constantly leaving a battery plugged in to keep the overall battery health high but not nesscesarry depending on the type of battery. Maybe possibly look into this?

This is an EcoFlow unit. LiFePO4 batteries. Not an issue here.

 

[Eric R.]

Thank you
I plugged in the pump and the siphon pump on the battery and ran for about eight hours
I’m pretty good with that. I just wasn’t sure about leaving that battery plugged in to the power source at all time.

EcoFlow can be left plugged into all the time, that’s what they are designed for.

 

[rusty dowell]

perfect
Looks like I will have 8 hours

 

[Marcos Avellan]

What model ecoflow is that? Thank you

 

[VintageReefer]

Hey there, I don’t see any issues, I think personally this is a great system! If you want to calculate your load and how long the battery will last for I’ve attached a few quick points and formulas I used;

1. Determine the Power Consumption of Each Consumer​

• Each pump will have a power rating, usually in watts (W) or kilowatts (kW). Check the pump labels, user manual, or datasheets for the power consumption.

If the power rating is in amps (A) and the voltage (V) is known (e.g., 120V or 240V), you can calculate the wattage using the formula:

Power (W)=Voltage (V)×Current (A)Power (W)=Voltage (V)×Current (A)
If the power rating is given in watts (W), you can skip this step.

2. Calculate Total Power Consumption​

• Add the power consumption of both pumps:

Total Power (W)=Power of Pump 1 (W)+Power of Pump 2 (W)Total Power (W)=Power of Pump 1 (W)+Power of Pump 2 (W)
For example, if Pump 1 uses 500W and Pump 2 uses 400W, then:

Total Power=500W+400W=900WTotal Power=500W+400W=900W

3. Check the Backup Power Source Capacity​

• You need to know the total energy available in your backup power source, often measured in watt-hours (Wh) or kilowatt-hours (kWh). This might be listed as the battery's capacity. For example, if you have a 12V battery with a capacity of 100Ah:

Energy (Wh)=Voltage (V)×Capacity (Ah)Energy (Wh)=Voltage (V)×Capacity (Ah)
For a 12V, 100Ah battery:

Energy=12V×100Ah=1200WhEnergy=12V×100Ah=1200Wh

4. Calculate How Long the Backup Power Will Last​

• Finally, calculate how long the backup will last by dividing the total energy available in your backup source by the total power consumption:

Runtime (hours)=Energy Available (Wh)Total Power Consumption (W)Runtime (hours)=Total Power Consumption (W)Energy Available (Wh)
For example, if you have 1200Wh of backup energy and the total power consumption is 900W:

Runtime=1200Wh900W≈1.33 hours (1 hour and 20 minutes)Runtime=900W1200Wh≈1.33 hours (1 hour and 20 minutes)

Summary Formula:​

Runtime (hours)=Battery Capacity (Wh)Total Power Consumption (W)Runtime (hours)=Total Power Consumption (W)

Take care!

this is not the forumula for LiFePO4 power stations

(Watt hours of device x .85 efficiency factor) / (total watt load) = hours of runtime

Example
(600 wh station x .85) / 15 w pump = 35 hours

What model return pump is only giving you 8 hours? Is it a dc pump?

This is a 600wh backup on my 75 g reef, return pump only, unplugged from wall to simulate outage.

The station I use gets 35 hours from my return pump. It reports 39 but when it gets real low on power the estimate lowers faster

 

[VintageReefer]

Hey there, I don’t see any issues, I think personally this is a great system! If you want to calculate your load and how long the battery will last for I’ve attached a few quick points and formulas I used;

1. Determine the Power Consumption of Each Consumer​

• Each pump will have a power rating, usually in watts (W) or kilowatts (kW). Check the pump labels, user manual, or datasheets for the power consumption.

If the power rating is in amps (A) and the voltage (V) is known (e.g., 120V or 240V), you can calculate the wattage using the formula:

Power (W)=Voltage (V)×Current (A)Power (W)=Voltage (V)×Current (A)
If the power rating is given in watts (W), you can skip this step.

2. Calculate Total Power Consumption​

• Add the power consumption of both pumps:

Total Power (W)=Power of Pump 1 (W)+Power of Pump 2 (W)Total Power (W)=Power of Pump 1 (W)+Power of Pump 2 (W)
For example, if Pump 1 uses 500W and Pump 2 uses 400W, then:

Total Power=500W+400W=900WTotal Power=500W+400W=900W

3. Check the Backup Power Source Capacity​

• You need to know the total energy available in your backup power source, often measured in watt-hours (Wh) or kilowatt-hours (kWh). This might be listed as the battery's capacity. For example, if you have a 12V battery with a capacity of 100Ah:

Energy (Wh)=Voltage (V)×Capacity (Ah)Energy (Wh)=Voltage (V)×Capacity (Ah)
For a 12V, 100Ah battery:

Energy=12V×100Ah=1200WhEnergy=12V×100Ah=1200Wh

4. Calculate How Long the Backup Power Will Last​

• Finally, calculate how long the backup will last by dividing the total energy available in your backup source by the total power consumption:

Runtime (hours)=Energy Available (Wh)Total Power Consumption (W)Runtime (hours)=Total Power Consumption (W)Energy Available (Wh)
For example, if you have 1200Wh of backup energy and the total power consumption is 900W:

Runtime=1200Wh900W≈1.33 hours (1 hour and 20 minutes)Runtime=900W1200Wh≈1.33 hours (1 hour and 20 minutes)

Summary Formula:​

Runtime (hours)=Battery Capacity (Wh)Total Power Consumption (W)Runtime (hours)=Total Power Consumption (W)

Take care!

Is this an AI answer ? It feels that way. Has a lot of info but not applied to the question properly and not giving a correct formula

 

[VintageReefer]

What model ecoflow is that? Thank you

Look like either a
River 2 - 500wh
Or river 2 pro - 768wh

 

[VintageReefer]

Is this an AI answer ? It feels that way. Has a lot of info but not applied to the question properly and not giving a correct formula

@Miami Reef

 

[Miami Reef]

@Miami Reef

It’s AI, but it was made before I made my TOS thread.

 

[VintageReefer]

It’s AI, but it was made before I made my TOS thread.

So they have been doing it for a while. And it’s wrong here also

 

[Miami Reef]

So they have been doing it for a while. And it’s wrong here also

That’s why I made the thread. I checked the profile prior.

 

[VintageReefer]

Here is another setup I have on a different tank

600wh battery backup
28w dc return pump

Formula
(600wh x .85) / 28w load = 18.2 hour runtime estimate

And we check the station when unplugged from the wall simulating an outage….and it’s right on track predicting 18 hours