Solar PV battery options

Good afternoon,

I'm adding a battery to my solar PV system and would like to confirm this setup is compliant with the national rules.

I have a Solis hybrid inverter S5-EH1P6K-L: https://www.ginlong.com/energy_storage_inverter5/3_6k_s5_l_en.html

I'm adding the following:

• Pylontech US5000 4.8kWh 48V: https://eu.nkon.nl/pylontech-us-5000-48-v.html
• Enclosure (I still have to find which one)

And between the battery and inverter:

• Projoy Battery Isolator 160V 125A DC MCB: https://www.projoy-electric.com/Products/Circuit-Breaker/PEBS-L-DC-Miniature-Circuit-Breaker/PEBS-L-Series-160V-125A
• Projoy DC MCB Weatherproof Empty Enclosure 4 Module: https://www.projoy-electric.com/Products/Circuit-Breaker/PEBS-S-DC-Miniature-Circuit-Breaker/Weatherproof-Enclosure

I'll use the EPS/back-up port of the inverter in the future, but for now I only want to connect the battery.

Am I missing something? Any recommendation?

Thanks!

Me too. I only have a few of them so far, honest! 😂

Just to nail my colours to the mast, I'm not desperate for another set, it's just I'll add if a sensible opportunity presents itself. I'm willing to spend €500 for a set of 16

This is very interesting,

When will NaFePO4 come to the market? and what should we be paying for EVE 280K grade A batteries? I want to purchase another 160 cells?

Thank you

@jumpin jack - "When will NaFePO4 come to the market? "

I don't know but I am following this with interest. I'd expect it to be at least 2 years away before we can get them for half price of what we are paying now for LiFePO4. But don't quote me on that 😂

For the folks with the Huawei Sun/Luna system, how do you find the efficiency of the unit?

I see a review here on YT saying that it is losing out on output on the Huawei compared to Solis (and another brand) which is can add up.

I'm about to pull the trigger this week, so I'm curious to get your feedback to see how it is performing

@HotSwap , I see you mentioned "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."

Is that amount of loss considered normal do you know? Effectively losing maybe around 1.5-2 kWh for a 10kWh battery per night if you discharge them all daily. That kinda adds up over the course of a year (548kWh pa). I wonder if other inverter like Solis would be similar during conversion

When going from AC to DC and back yeah this is normal. However sometimes you’ll be charging your battery directly from DC so you will only have the loss on the way out.

I understand the higher the load; the better the efficiency; so while my inverter is capped to only charge at 3kwh it can discharge at 6kwh; which would be operating more efficiently.

I’ve seen that video before; it would be very hard to make these comparisons unless you split your array 50/50 and sent one half to one inverter and the other half to another. Very few of these kind of comparisons exist. I’ll rewatch that video later and let you know what I think.

Yeah. But I spend a lot of time down at the 5-10% load range.

here is the curve for my inverter:

But you’re right to point that out; I’m atcually most efficient at 3kwh and drop off slightly as I get up to 6kwh. I didn’t expect that.

Hi folks,

Thanks to @graememk for mentioning fogstar.co.uk, I'm ready to place an order for Seplos Mason kit and 16 Grade B LF280K EVE giving me 14.3kWh, so before I place the order, I wanted to get anyone's thoughts/advice.

My inverter is solis 6kw 5g model so I'm pretty much ready to go with batteries.

I'm going for the horizontal box so that I can stack a second box and I might even get a second kit if fogstar do a deal, I'd then have 28.3kWh and the job would then be done for quite some time.

do you mean cables from the inverter to the battery?

Ahh I just checked and its a screw down terminal which is handy 👍️ but I'll wait and see what actually arrives.

Also They're telling me the BMS is bluetooth but the batteries will be in my garage so well out of range of BT -- has anyone changed/upgraded this to wifi?

I'll be monitoring things through the solis & myenergi apps but would like to monitor the BMS via my phone as well.

already have 18 panels; 6kwinverter and 10kwh battery huawei.

Let’s say I had 2k to play with for a DIY setup; what can I expect to get out of it.

@graememk has posted a link a few times about a Seplos kit with 280Ah grade B cells, available in Northern Ireland for a bit over £2k. That's 14kWh. Would be a massive upgrade of your system for relatively little money. It is a kit though, you have to build it up yourself. But it's pretty straight forward and there are vids on YouTube about it

I honestly don't know. I'm open to offers