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We managed this in April-May:

Maybill.png

This is on a H1-5.0-E, so no grid pressure setting is available. Instead, it's just using Feed-In First from 05:30 to 20:30, force exporting from 20:30 to 23:30 and force charge between 23:30 and 05:30.

Pretty much all of that peak rate usage is from ...

In my experience the battery will only charge if it drops below 97%. Otherwise it would be constantly trickle charging it which can't be too good for it.

That sounds about right. Mine are 26 months old and are currently at 91% SOH.

That's with 597 cycles so far.

This has caught me out before.

I usually force charge and then run from grid when the battery is full from 23:30 to 5:30 (Octopus Intelligent Go). I deliberately set this to 23:30 to 04:30 yesterday evening in anticipation of it not changing and sure enough it ran until 05:30 - an hour longer than ...

I suspect this undersizing is rather common unfortunately. My installer only installed a 20A breaker on my H1-5.0-E.

It hasn't tripped in 2½ years but isn't ideal.

No, it won't as you can't be in two work modes at the same time. If you were for example force discharging then it will send out all PV and whatever is required from the batteries to get to the inverter AC maximum.

For example, if you are generating 3kW and have a 5kW inverter, it would send out ...

Thanks again Dave, that works perfectly.

Thanks Dave.

Rather annoyingly it's dull and generation has stopped, so I can't see if it's working yet. Fingers crossed!

I have two arrays, so currently get live data from those direct from my H1-5.0-E (sensor.pv_power_h1_5_0_e) and the second (sensor.h1_5_0_e_ct2_meter) as well as a custom sensor (sensor.total_pv_power) which is just both added together.

I'd like to be able to see the maximum for each of those three ...

As Dave mentions above, the capacity will reduce as the batteries get colder. I have 6 HV25 batteries at 92% SOH, so about 13.2kWh usable, however at this time of year it's more like 11kWh when they are cold. Here's a trace showing how the BMS has to re-adjust the expected remaining capacity as the ...

I have essentially the same setup, a H1-5.0-E (Gen 1) and F3600 with another array attached. To see the figures for the F3000 you need a second CT clamp from the H1 to the feed from the F3000. The generation from the F3000 would then show as "Meter2power". The figure will be negative however as it ...

Is there any chance this will be made possible on the H1 gen 1 in the future? It always uses about 0.3kWh per day at the peak rate so it would save about £30 per year alone.

As mentioned above, I would be looking at the battery temperature. Unusual charging from the grid, the battery suddenly not being used etc all sound like it's too cold. What temperature is it showing in the v2.0 app?

These issues nearly always pop up for people during very cold spells.

Edit: Dave ...

The battery brackets hold them securely upright and spread the weight over each battery. They're all attached to each other by the brackets so they can't move or fall over.

I've had 5 (and 6 since August, so 164kg!) HV25s up there for 2 years now. :lol:

Mine were installed front side up by the installer, so that they span more joists. I haven't encountered any issues but its always been at the back of my mind I must admit.

I would have preferred them in the detached ...

Yes, my HV25s reduce to around 0.55kW charge rate per battery below 10C min cell temp (about 10A). With 6 batteries I get about 3.3kW charge rate. For you, with four, I'd expect about 2.0-2.2kW below 10C (as your trace shows). This will drop further if below 5C until no charging occurs at 0C.

As ...

It's a very good quote if thats including the install. Under £12k for 16 panels, 10kW inverter and 20kWh of batteries is excellent.

A single KH10 or 10.5 would serve you fine depending on how large your proposed new array is. Your existing 15x 400w panels on one roof could be split between two MPPTs, leaving another two MPPTs for your new array. There would not be an issue with your house fuse as that would only be 45A ...

A single KH10 or 10.5 would serve you fine depending on how large your proposed new array is. Your existing 15x 400w panels on one roof could be split between two MPPTs, leaving another two MPPTs for your new array. There would not be an issue with your house fuse as that would only be 45A charging ...

Do you already have EQ4800s (x4)? If so, you could just get more slaves and run the new SW array on a simple F Series inverter. As long as they are connected by a CT clamp, the H1 will see the generation of the new array and charge the batteries from it. Its the most cost-effective option. The other ...

Welcome to the forum,

The maximum charge rate is 3.68kW (Kilowatts) as shown in your image. The capacity of the batteries is 9.6kWh (Kilowatts per hour), meaning at a charge rate of 3.68kW it will take about 2½ hours to charge the battery from empty.

thanks,

ok, so lets say I buy 1kw for 7p and export for 15p
so that is 8p profit per kw
if my battery is 10kw, I leave 1 kw in reserve
I sell export 9kw in the morning=9x8=£0.72
times 365=£262.8 per year
battery cost £3000/262.8=11.4 year for the battery to pay off
and that is you do this every ...

Thank you so much for the quick response.
I have ordered the boards and should arrive by Monday. I assume all 5 sides are covered. Did you keep 30cm gap between the batteries and the insulation please?
Thank you so much once again.


Mine is about a 10-15cm gap around, but it is not insulated ...

Hi Martyn, mine done exactly the same last evening. Stopped charging around 1130pm. Looking at the graphs, it didn’t look like an occasional low power charge due to temperature but I may be wrong. If it was this then not sure why it would have suddenly stopped?
Here is the charging graph….


It ...

I have an insulating fire blanket over the cables just for a piece of mind. However in normal running they shouldn't ever get hot.

I've had this insulation on for over a year and didn't actually need to remove it over the summer as it seems the biggest challenge has been keeping the batteries warm ...