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What about my eve cell order, I have heard nothing

Where's my money Michael?

I agree with most of what you said. I have changed my setup since. I found an industrial contactor which I control with the relay in my Victron BMV700. The BMV700 relay can be triggered by battery voltage or STATE OF CHARGE (how cool is that?) it even has hysteresis settings. So I just set my...

Another solution is to use a current sensor to turn in the second inverter. Reduce the standby losses and still have ample power when you need it.

Because of the the flatter voltage curve for LIFePO4 the MPP Solars will go to absorb and float too early on the lithium settings, maybe on 12v they're ok but the 48v are not. For example the low voltage disconnect setting for Lifpo4 is so close to the normal operating battery voltage that the...

That's how they should work but my MPP solar doesn't seem to work that way. When I reduce the bulk voltage the charge rate also reduces.

I used one I scavenged out of a old lift motor power supply.

My BMV is set at 98% which seems pretty good so far. The firmware fixes I mentioned are third party and I found them here https://forums.aeva.asn.au/viewtopic.php?f=64&t=4332

If you have a look at the spreadsheet you'll see my presumed SOC is fairly consistent over 2 months so far, I am recording these readings in view to fine tune the BMV settings if they start to deviate.

I might be wrong but if I set the capacity lower, I think the BMV will still drift as it has no reference. A SOC reset by voltage is problematic as well because charging and discharging affect the voltage at any given SOC. Is it a MPP solar inverter because I had the early float issue as...

Hi, I am using the SOC relay in a Victron BMV 700 to control a contactor which switches the pv panels to my chargers. This way I can charge my batteries with a higher voltage setting and have it stop at say 80% SOC to increase my battery lifespan. This works very well. The only issue is that I...

Hi, I am using the SOC relay in a Victron BMV 700 to control a contactor which switches the pv panels to my chargers. This way I can charge my batteries with a high voltage and have it stop at say 80% SOC to increase my battery lifespan. This works very well. The only issue is that I need to be...

Great info in those graphs

I haven't used the new firmware yet because I used alternative solutions to the MPP shortcomings. If I had know before I implemented my solutions I would definitely have had a fo at the new firmware.

https://forums.aeva.asn.au/viewtopic.php?f=64&t=4332

I have a few MS5048's and I have the same issue. What I have done is I have put a contactor on the solar input side which is controlled by the SOC relay on a Victron BMV700. It works a charm but I have since discovered there is another solution. Some folks downunder in the AEVA forum have...

Are they still for sale?

Totally different animal.

I don't know if supercaps will he If your BMS is shutting the power down to your inverter I can't see how super caps can help. The only benefit you could get by putting a bank of super caps in parallel with your batteries is that they will smooth out the power so that short duration pulses of...

Hi, I have two MPP 5kw inverters in parallel but I also want to conserve power and I only rarely need both units on. I have installed a current sensing relay to turn on the second unit when the current gets over a specific threshold, I have an additional timer relay to keep the second inverter...

I have just used the bmv700 SOC relay to turn a contactor on and off to control the PV power into the charger, works a treat. I can charge to 80% without it going to float or having to use a low charging voltage.

Just finished an upgrade to my system to optimise things a little. The goals I had were: Prevent the BMS from shutting the inverter down when it goes to high disconnect. Voltage spike caused by BMS shutting down high currents tripped the inverter occasionally. Charge lithiums to SOC not voltage...

When I say as quickly as possible, that is not over any recommended charging rates, it is as quickly as possible within allowable charge rates. The most I'd be charging at the most it would be 0.25C but would usually be closer to 0.15C. Can you point to some references in regards to charge rate...

Ideally I want to stop charging at between 80-90%. I still have the problem at 14.1v x 4 that my BMS goes over volt towards the end unless it goes to float and then it doesn't charge fast enough. I want to charge at say 14.2v x 4 at maximum amps but stop charging when the battery voltage gets to...

I think part of the problem is the charging algorithm is designed for AGM so with the flat voltage curve for lithium the float triggers earlier than we want. I wish I could find out the actual algorithm they use but I don't think that's available. I turn float off by setting bulk time to 900...

I have a similar issue, MS5048. I have tried various combinations of float and bulk voltages and there is no great combination. Either the BMS gets triggered by high disconnect or the charging rate is way too low when the float kicks in way too early and because each charging day is different...

The BMS can cut the power going into the batteries but still allow power out of the batteries. The BMS is like two switched diodes.

I have noticed the same on my system (ms5048). Float is initiated way too early and the amps are throttled. That is why I'm thinking of just charging on bulk but have the BMS control the system. The problem with this is the power spike that occurs when the charger is disconnected when it is...

I have tried using various combinations of bulk and float voltages but I found the float always kicks in way too early and even if it is set a a high enough voltage the amps get throttled the float stage progresses.

No I can't, all I can set is my max charge current and my charging voltage. Yes I want to have my charging voltage at a reasonable value so I can get the amps into the batteries but I want to stop charging at a lower battery voltage. I know with more expensive chargers anything is possible but I...

I am charging with the ms5048, there is no lifepo4 profile.

The BMS just disconnects the charging, the batteries can still supply power to the inverter

All I can set are the bulk, float voltages, bulk time and max charging current. I don't want to limit my charging current too much.

I have 7kw solar, 2x MS5048, 500 amp smart Daly, 2 amp balancer, 2P16S 280Ah LiFePO4. I am trying to keep my batteries between 20-90% SOC for longevity but I want to get to 80-90% as quickly as possible. Setting up the charging voltage at 56.8v and letting the BMS stop charging at say 53.8v or...