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Author Topic: A few more batteries  (Read 1508 times)
kdmnx
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« on: March 26, 2020, 03:46:04 PM »



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12x JA Solar 340Wp panels (total 4080Wp)
Lux Power inverter charger
5x PylonTech 2000 2.4kWh batteries (total 12kWh (11kWh usable))
Solarchaser
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« Reply #1 on: March 27, 2020, 05:30:50 PM »

Nice, what are you up to now?
I think Nowty is the one to beat (as if)
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nowty
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« Reply #2 on: March 27, 2020, 07:19:27 PM »

I thought last year that I had gone completely over the top with the batteries but now I am heating my house with a heatpump and charging the EV, I now find the battery bank about the right size in comparison to my PV size and loads.
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12kW+ of PV installed and 60+ MWh's generated.
Home battery storage of 40+ kWh's.
Hot water storage of 15+ kWh's.
Heat storage of 15+ kWh's.
6kW Ground source heatpump.
EV BMW i3 (another 30+ kWh's of storage).
300,000+ litres of water harvested from underground river.
dan_b
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« Reply #3 on: March 27, 2020, 08:11:49 PM »

How much for 4-6kWh of these batteries plus a suitable inverter/controller and some sort of control unit/sensor/software?
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3.06kWp SolarEdge system with a split array:
2.18kWp 10x South facing, plus 4x West facing 880W

Mk1 ImmerSUN DHW diverter
4kW PowerVault Battery

Tesla Model 3 Long Range
pantsmachine
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« Reply #4 on: March 27, 2020, 09:53:41 PM »

About 2.5 grand Dan. Would get you a couple of batteries and a hybrid charge controller. After that it's hook up costs only. That's going on my set up only, there may be better prices on the controller....
« Last Edit: March 27, 2020, 09:56:47 PM by pantsmachine » Logged

7.07kWh PV system with Solar edge
7.2kWh Pylon tech battery storage
18kWh Heater Storage
Solar I boost charging 12kWh 210 ltr OSO system tank
Deep insulation, air leak controlled home
Zoned & Balanced CH wet system
Hive 2
Low energy bulbs
24 kW Leaf
Masanobu Fukuoka garden & wooden hot tub
billi
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« Reply #5 on: March 27, 2020, 10:52:31 PM »

Quote
How much for 4-6kWh of these batteries plus a suitable inverter/controller and some sort of control unit/sensor/software?

Quote
About 2.5 grand Dan


so the answer is including  the  rest of the gear ?
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1.6 kw and 2.4 kw   PV array  , Outback MX 60 and FM80 charge controller  ,24 volt 1600 AH Battery ,6 Kw Victron inverter charger, 1.1 kw high head hydro turbine as a back up generator , 5 kw woodburner, 36 solar tubes with 360 l water tank, 1.6 kw  windturbine
kdmnx
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« Reply #6 on: March 28, 2020, 08:22:00 AM »

These are 2.4kWh each, 2.2kW of which you can use. They are c. £800 each, but delivery can be expensive because they weigh 25kg each. I paid £2300 for the three, delivered, which I think is a good deal. I already had 2 so already had the inverter-charger. This brings my usable storage capacity to 11kWh and allows my inverter-charger to push/pull its max 3.6kw.

Previously with 2 batteries a sunny day looked like this:



You can see I'm running on grid power overnight, then by 11am the batteries are full and I'm exporting to the grid, and by 9pm the batteries are empty again.

This is what I have now:



Basically no grid power required (0.2kWh in, 0.2kWh out). Not bad for March! I installed an extra couple of panels yesterday bringing my array up from 3400kWp to 4080kWp.

I have a plugin-hybrid car on order (would be here by now but there is some kind of "bad cold" going round), that will use some additional power. The plan is to switch to Octopus "Go" in the winter so I can charge the batteries/car in the cheap hours when there isn't much sun around.
« Last Edit: March 28, 2020, 10:00:54 AM by kdmnx » Logged

12x JA Solar 340Wp panels (total 4080Wp)
Lux Power inverter charger
5x PylonTech 2000 2.4kWh batteries (total 12kWh (11kWh usable))
pantsmachine
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« Reply #7 on: March 28, 2020, 08:50:48 AM »

Quote
How much for 4-6kWh of these batteries plus a suitable inverter/controller and some sort of control unit/sensor/software?

Quote
About 2.5 grand Dan


so the answer is including  the  rest of the gear ?

I kept it vague as each person has different existing gear/needs/skills/discount access. I'd say about £3.25k to have an autonomous maintenance free 4.8 kw set up installed and functioning? Further capacity can be added to at a later date as a few have done and finances allow. As an aside, If I had realised the implications when system was specced along with the arrival of Octopus and their clever tariffs I would have bought the 5kw version of the Goodwe hybrid controller instead of the 3.6kw version. The rating dictated the maximum discharge capability of the unit. It doesn't affect us much but if i was in a younger continual washing machine/tumble dryer environment i'd enjoy the extra capacity of discharge before going to the grid.   I hope this helps, cheers.
« Last Edit: March 28, 2020, 10:25:39 AM by pantsmachine » Logged

7.07kWh PV system with Solar edge
7.2kWh Pylon tech battery storage
18kWh Heater Storage
Solar I boost charging 12kWh 210 ltr OSO system tank
Deep insulation, air leak controlled home
Zoned & Balanced CH wet system
Hive 2
Low energy bulbs
24 kW Leaf
Masanobu Fukuoka garden & wooden hot tub
brackwell
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« Reply #8 on: March 28, 2020, 10:13:15 AM »

No wonder you need all those batts when you are drawing 600-800W 24/7   (600W x 24hr = 14.4kwh/day )
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kdmnx
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« Reply #9 on: March 28, 2020, 11:18:01 AM »

No wonder you need all those batts when you are drawing 600-800W 24/7   (600W x 24hr = 14.4kwh/day )

I know. My “baseload” is pretty high. I have a big American-style fridge-freezer, CCTV cameras and the fileserver they save to (as well as UPS), and a fish tank with heater, pumps, etc., all running 24/7/365.

I need to have a hunt round to see if there are any parasitic loads I might be missing...
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12x JA Solar 340Wp panels (total 4080Wp)
Lux Power inverter charger
5x PylonTech 2000 2.4kWh batteries (total 12kWh (11kWh usable))
kdmnx
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« Reply #10 on: March 30, 2020, 10:56:26 AM »

Definitely charging faster than before:



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12x JA Solar 340Wp panels (total 4080Wp)
Lux Power inverter charger
5x PylonTech 2000 2.4kWh batteries (total 12kWh (11kWh usable))
pantsmachine
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« Reply #11 on: March 30, 2020, 12:18:51 PM »

You should be charging at 3.6kw as well depending on your stack temperature and bms software. I have been surprised at the 'fluidity' that the 3rd battery brought.
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7.07kWh PV system with Solar edge
7.2kWh Pylon tech battery storage
18kWh Heater Storage
Solar I boost charging 12kWh 210 ltr OSO system tank
Deep insulation, air leak controlled home
Zoned & Balanced CH wet system
Hive 2
Low energy bulbs
24 kW Leaf
Masanobu Fukuoka garden & wooden hot tub
kdmnx
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« Reply #12 on: March 30, 2020, 12:49:51 PM »

You should be charging at 3.6kw as well depending on your stack temperature and bms software. I have been surprised at the 'fluidity' that the 3rd battery brought.

Yeah, with a 4080kWp array, and a "baseload" power consumption of 400-600W the 3600W max charge should be more than enough. If the sun actually comes out for more than 5 mins I'll try to catch it charging even faster...

How deeply do you discharge your batteries? And, do you know what the difference is between the U2000 and U2000 Plus is?
« Last Edit: March 30, 2020, 12:59:27 PM by kdmnx » Logged

12x JA Solar 340Wp panels (total 4080Wp)
Lux Power inverter charger
5x PylonTech 2000 2.4kWh batteries (total 12kWh (11kWh usable))
pantsmachine
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« Reply #13 on: March 30, 2020, 01:16:01 PM »

I discharge to 90% when it gets that low. The 2000 is I think limted to 80%. 90% is personal choice though, I think most people stop at 80% for longevity. Same here for sun, excellent minutes at a time then clouds back over, seeing around 10 kwh off panels with a monthly high of 15 kwh.  Trending upwards! Smiley
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7.07kWh PV system with Solar edge
7.2kWh Pylon tech battery storage
18kWh Heater Storage
Solar I boost charging 12kWh 210 ltr OSO system tank
Deep insulation, air leak controlled home
Zoned & Balanced CH wet system
Hive 2
Low energy bulbs
24 kW Leaf
Masanobu Fukuoka garden & wooden hot tub
kdmnx
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« Reply #14 on: March 30, 2020, 01:37:57 PM »

I discharge to 90% when it gets that low. The 2000 is I think limted to 80%. 90% is personal choice though, I think most people stop at 80% for longevity. Same here for sun, excellent minutes at a time then clouds back over, seeing around 10 kwh off panels with a monthly high of 15 kwh.  Trending upwards! Smiley

I've been discharging to 90%, have just set it to 85% for now. Will see how it goes. Have WAY more capacity than I need on grey days. I'll have a plugin car delivered at some point (some sort of "bad cold" going round has delayed it), that will use up some daytime power. I'll see how I go in winter, when I'll be charging from cheap overnight grid power.
« Last Edit: March 30, 2020, 02:29:44 PM by kdmnx » Logged

12x JA Solar 340Wp panels (total 4080Wp)
Lux Power inverter charger
5x PylonTech 2000 2.4kWh batteries (total 12kWh (11kWh usable))
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