Solar for Beginners [ask your questions here]

Dr Robert

I'm not a noob to solar, but I've a question regarding these dyness batteries. Are they plug and play, or is there anything else to do bar hook up to inverter? I've previous experience with plug and play pylontech.

Thanks

https://www.nkon.nl/en/dyness-powerbox-g2-51-2v-10-24kwh-thuisbatterij.html

Liam2021

Currently have a 10 kw battery which usually charges from 10% to 100% in 3 hours, while this is charging the EV will be charging, the hot water will be heating, the dishwasher and washing machine is running all within the cheap ev electric rates. No issues with any of it.

Dr Robert

Thanks.

I was more referring to the setup. Is the battery I posted plug and play out of the box?

magicbastarder

https://www.boards.ie/discussion/comment/123938703#Comment_123938703

What's the main fuse for the house?

I think that if you've a 63A fuse you won't get full charging to the battery and the car while heating water and using the other appliances?

Calahonda52

https://www.boards.ie/discussion/comment/123939551#Comment_123939551

Lets guess

Battery 3

EV 7.6

Immersion 3.0

Dishwasher 2.1 intermittent

Cloths washer 2.1 intermittent

That looks like 17.8 so 74 @ 240 so I suspect the car charger is intelligent to keep it below 63

If V is 220 then 81, or like I saw here 205 recently gives 88 [ zappi shut down at the 205]

However never a good idea to be pushing 63 for several hours, be interesting to put a thermal imaging camera on the panel, with the cover off

magicbastarder

yeah, you won't be able to pull more than about 15kW on a 63A fuse; my car and battery pull in 12.5 when combined - not much headroom for multiple other (especially water heating) appliances above that.

magicbastarder

my initial assumption is that this weird quirk in the graph is solis switching from DST to GMT, but i'm not sure why it happened at 10am our time, which would be 5pm in China?

naughtysmurf

https://www.boards.ie/discussion/comment/123935342#Comment_123935342

I’ve quoted my own post to show what I’m getting installed later this week, I’ll also be switching suppliers on Nov 13, last 12 months we consumed 7,400Kwh, we’ve GFCH

Anybody with solar have an idea if I’m better switching to Yuno or EI in my situation?

The EI nightboost rate is attractive, I could charge my battery during that period but the standing charge is a lot higher & their day & night rates are higher as is their gas.

Bonkers say Yuno by a good bit but they are not factoring in the new panels so not sure what’s best, there is also two WFH so that impacts day usage so leaning towards Yuno

Yuno - DAY-25.84, NIGHT- 13.53, PEAK- 29.17 SC- 245.24. Gas- 7.84, SC- 150.03

EI. - DAY- 30.52, NIGHT- 15.05, NIGHTBOOST- 8.83, SC- 328.54 GAS- 9.78, SC- 155.96

TIA

Geuze

I am thinking about getting solar panels. I am at the stage of learning about them.

The front of the house points more or less south.

A neighbour has solar panels, see photo below.

One thing is that the houses have an apex (I don't know the correct term), see below, which reduces the possible number of panels.

There are eight panels on the house below, not all visible in the photo.

My question: is it possible to mount a single panel on each side of the apex, i.e. one pointing east and one pointing west?

This would mean 10 panels in total.

Geuze

If I am thinking of getting better attic and wall insulation, and also solar panels, which should be done first?

I also want to get boards nailed to the roof joists so it's possible to walk around the attic.

Thanks.

Dufrain122

First night with 3 x Dyness PowerDepot H5B 5.12kw batteries

So 15kw in total

Charge/discharge limit of battery 50a

I’ve a Solis inverter capable of 5kw 100a charging.

I’m on Energia EV rate so 2-6am.

I set the battery to charge last night 2-6am

It kept charging for the full 4 hours but the battery only charged from 11% to 85%.

Is this correct or should it have got to 100%?

Thanks for any help

BMS settings from Solis inverter. Are these correct or with 3 batteries should the charge limit be 150A?

Time of use settings from Solis app

Battery settings on Solis app:

Solis inverter details:

graememk

https://www.boards.ie/discussion/comment/123950466#Comment_123950466

Can you look up the app for the charging power (battery power) graphs.

But yeah the 3 batteries should be giving a max discharge and charge of 150 amps

I think @SD_DRACULA had this when they had dryness?

Dufrain122

thanks for reply.

4.50am not much else but the battery on at this time.

3085w pulling from the grid.

But 958w looks to be going to battery.

Where the other 2kw going?

graememk

https://www.boards.ie/discussion/comment/123950502#Comment_123950502

3kW is roughly 50 amps once you take house load into account.

900w is likely been reported by one of the batteries. Last time I used the solis it logs the power from the BMS and what it uses.

Is there communication between the dryness batteries?

You may need to run it in user defined mode.

Dufrain122

Thanks for that I’ll check it out.

Any idea how long it should take to charge from 10% to 100% for the 15kw of batteries?

I’m currently on Energia EV rate 2-6am.

But I was hoping to change to Pinergy EV 2-5am.

If setup properly should I be able to charge these from 10% to 100% in a 3 hour window?

Or am I way off?

Thanks

SD_DRACULA

https://www.boards.ie/discussion/comment/123950614#Comment_123950614

Just under 3 hours, assuming you have the inverter to charge at 100A

Not sure if still the case but the Solis inverters were terrible for keeping 100a for more than 15 mins, they would drop to 60-70a after so maybe you could just about fill it in 4 hours then.

Dufrain122

thanks @SD_DRACULA

I’ve 3 Dyness batteries to a total of 15kw. Max input/output for each battery is 50A.

This is what the BMS is showing on my Solis inverter. Are these wrong set at 50A and 40A?

Should they be higher?

SD_DRACULA

https://www.boards.ie/discussion/comment/123953378#Comment_123953378

Yes change it to 100a for both

Tandey

Have most folk here renewed with Energia despite the price rise?

My contract is coming to an end shortly and checking with energy pal suggests pinergy but not sure I want to be in a 24mo contract.

ECO_Mental

https://www.boards.ie/discussion/comment/123969345#Comment_123969345

Its 12 months…i switched recently and the agent said it was 12 even though website says 24. You can csll them to confirm also.

Dr Robert

Can the Dyness 10kw batteries charge at 100a?

Or is it 50a per battery? So two can charge at 100a combined.

Tandey

https://www.boards.ie/discussion/comment/123969564#Comment_123969564

Good to know cheers. How are you finding them to deal with. Was the switch straight forward and do they have a decent app/site to check usage bills etc?

Dufrain122

https://www.boards.ie/discussion/comment/123969671#Comment_123969671

I’ve got 15kwh Dyness battery made up of three 5kwh batteries.

I’ve a Solis inverter and charge at 100a

The batteries charge from 10% to 100% in 3 hours.

JohnySwan

https://www.boards.ie/discussion/comment/123970465#Comment_123970465

Sorry to be a pedant, but kw is power and kwh is energy. Battery energy is measured in kwh.

Dufrain122

https://www.boards.ie/discussion/comment/123970548#Comment_123970548

Spot on thanks

Dufrain122

Question on discharging from a battery.

Is it better to discharge from a battery at 50A than say 100A or does it make any difference?

Slow and steady or dump it as quick as possible?

Thanks

Dr Robert

https://www.boards.ie/discussion/comment/123970465#Comment_123970465

Does it take the full 3 hours?

100A x 51V = 5.1kW. Should it not be closer to two hours, plus 10% of the battery isn't usable.

I'm wondering wouid 2 x 10.24kWh get charged in 3 hours, so 18.43kWh usable?

ECO_Mental

https://www.boards.ie/discussion/comment/123970644#Comment_123970644

The recommended charge rate for the Dyness PowerBox is 0.5C, which is (100 amps at 51V) or 5.1kW. This means it will take approximately two hours to fill from zero.

Having 2 PowerBoxes in parallel, you could charge each at 5.1kW (for a total of 10.2kW). So, if you had an inverter big enough, you could charge at 10.2kW, and both would charge in about two hours.

BUT, the batteries aren't the bottleneck; it's your inverter that is probabaly the limiting factor. I am assuming it can charge only at 5kW, so to fill 18.3kWh (their usable capacity) will take ~3.66 hours (give or take!).

Me I have 3 Dyness PowerBoxes all ready to hook up and ready to go (30.7kWh in total), but I have an inverter that can charge them at 200 amps (which is ~10.2kW) so I should be able to charge these in three hours…

You can alway add a rectifier to add another 2kW charging power, there is another thread in here all about that..

m4r10

I'm in the process of getting a solar PV system installed, with a Solis S6-EO1P5K-48-EU inverter. One query that I have is whether the system would be able to run an electric shower from the battery (Dyness Powerbox G2) during a power cut? If not, would going for a bigger inverter solve that issue, provided that a bigger inverter is even allowed to be installed in a residential system?

To note that I have requested an S6 inverter rather than the older S5 model that was initially offered.

deezell

https://www.boards.ie/discussion/comment/123977143#Comment_123977143

With a quick look at the data sheet, that inverter has a max 5kwh output, even in off grid mode. You need 8-10kw for some of those showers. It can be combined in off grid with a second unit, a mix of battery/solar might get you there.