Solar PV battery options

Do ESBN ever check what's on the form Vs what is installed 🤔

Hi Mr Q

Do you have a link or a code for these. I didn't spot on their website.

Tks a million

i have followed your DIY experience on the many threads - and if im honest - i have a similar SOlis Inverter - i expect that I would run into a lot of the same issues you have - if i tried to build DIY. it puts me off totally trying to build a battery. Ill probably be hammered for this but its true. In 2 years ive not had to look at my system - its simply ticks over every day saving me money.

I got lucky - bought a battery at a reasonable price 2 years ago with my system - and i have paid less then a few 100 euros in 2 years in total for all my electric bills. Part of that is ofc becuase of the gov grants - but the way I look at it - trying to engineer a battery to "get to zero" costs is a giant waste of my time and money. MY system is already 2 years in and it wont be too many more years before my investment is cleared. (i took out a loan from a credit union to make the original investment which is coming to an end very soon anyway!)

A freind recently got a quote for a sysem with a 5 KWh battery from an installer and the price was much closer (still higher) to my total system cost so maybe things are starting to get back to normal soon.

TLDR; dont over engineer people! do your OWN maths!

@poker--addict - "People also need to ask why they want a battery. There is no financial logic to pay average or above average prices when FIT is 22-24 cents."

That's a good point, the exact reason I advise most people who ask me, not to bother with a battery

Crucial point of order here though. Do not buy a premade battery, they are terrible value for money and with a generous FIT, they will never pay for themselves. Unless you do it for green reasons / to stabilise the grid, etc. But don't do it for your pocket. On the other hand, building your own battery from quality cells costs less than half, particularly if you are a big electricity user and / or there is a big difference between day and night rate. Personally I am hoping for variable rates coming soon, then I will actually make substantial money from my big PV and battery setup, but there's also quite a bit of work in it, as @yankinlk alludes to. Unless you automate the lot, but there is even more work in that 😂

I received an email directly with the prices from libby@docanpower.com

It’s either the huawei Luna battery as you have mentioned. Or an LG Chem battery; it’s mentioned in the documentation; but I’ve never seen this implemented; and according to the documentation the performance of the inverter is reduced slightly when paired with the LG battery. Not sure they can even be got anymore.

I have the 6kwh sun 2000 paired with 10kWh of Luna. Happy to answer any other questions.

My main limitation is the rate at which the battery can charge; this is capped by huawei to 3kwh when charging from the grid; even though the unit is capable of charging at 5kWh from solar.

So because I’m on the night boost where I get cheep rate between 2-4 am; at 3kwh charge rate the most I can get into the battery is 5kWh 1kwh of lost energy in the conversions from AC to DC.

The good thing; and one of the points that made me go for Huawei is the sustained 5kWh discharge rate from the battery.

According to the documentation it has a 10 year warranty or 13.17mWh limit which in real terms would mean 2634 full 0-100 % charge cycles; which would be 7.2 years if you did a full cycle 7 days a week. 10.1 years if you only did a full cycle 5 days a week.

This is my battery SOC from this week; it’s 10kWh:

No. It’s performing as per the data sheet; it’s mentioned that grid charging is limited to 3kwh.

There are some other versions of the inverter they when combined with the battery do allow the full charge rate from grid also; but not the one I got unfortunately.

I would like to know what the reason is; it could be possible to hack the settings and increase it; as it seems to be a software limitation rather than a hardware one.

The inverter can comfortably pump out 6kwh for hours on end with out derating itself when we get a sunny day.

Even from PV?

Thoughts on this value ?

I'd go one step further and can't wait to get a smart meter. And hopefully a serious delta between night rate and FIT so I can load up at night and dump into the grid during the day

It's better for everyone if I did this rather than my current sending excess to run crypto mining rigs, when I don't need the heat they gave out (like in summer)

NEW Dyness A48100 solar battery.

Power: 4.8 KW

10 years manufacturer warranty.

All accessories / wires to connect the battery to inverter included.

Brand new sealed.

6 available.

Specs in the last picture.

1700€.

Limerick.

Hi folks - I’ve recently gone with a 20 panel 8.4kw system with Huawei Hybrid 6kw inverter EDDI / HARVI / ZAPPI but no battery as we have two EV’s in the house generally one always plugged in.

I think I’d like to get a battery to soak up excess (6kw inverter loses 2.4kw DC - correct??) and to get through the winter (charge with night rate) - I know ROI might be tight due FIT but if low enough I’ll do it.

I’m not going to go DIY but would love to know am I pigeonholed with certain batteries with my Huawei or can I get anything that comes to market at a good price?

Dyness for example??

Love to hear your thoughts…

Stuck with Huawei and possibly LG not sure if any others suit it.