Anyone want to share costs on batteries?
I am looking at beefing up my battery storage as the ASHP loves power, my solar is big and I have a cheaper overnight tariff.
I've been reviewing batteries and settled on the Seplos Pusung 5kw batteries - https://www.seplos.com/sale-14177418-pusung-s-stackable-household-lithium-48v-100ah-lifepo4-10kwh-off-grid-3kwh-5kw-battery-power-home-so.html
They are LiFePO4, so very stable, they have good storage, 5kw and they can charge/discharge at 100A@51v so 5kw peak in and out. They are also stackable, so I could get 2 and have 10kw etc.
I've also spoken to them and they've told me its $2100 (£1500) per unit for 1, $1800 (£1325) per unit for 6, and $1200 (£900) per unit for 12 plus $350 USD shipping per battery to the UK. If I get them in a big order, it works out very reasonable from a good supplier. I will also need a 5kw hybrid inverter, and this will be £600-£1000
My question is... is anyone else thinking about batteries? If you are, would you consider a bulk order to lower the costs? Using Octopus Go, I could realistically charge 20kW overnight at 5p/kW
One thing to note would be if Octopus goes under or removes the Go tariff you would be left with a system that would only really work in summer provided you can fill all the batteries with excess solar and have expensive batteries doing nothing in winter.
Mitsubishi Ecodan 14kw ASHP + 500l Cylinder
@george there are plenty of other time of day tariffs and EV tariffs from many major firms. Currently my 14kw batteries provide 32% of all my power use. If you can buy them at the right price they make better financial sense than solar panels - which only work when the sun shines and if you don't use the power you give it away to the network operator
I’ve been seriously looking at battery storage, had a quote for Huawei 10kw and 19 405w panels at £14k. Just about to point out to the solar company that the panels won’t fit. There is a market for a decent national solar company.
what inverter are you planning on using?
@mattengineer I've got a Sofar 3000 however that only charges/discharges at 3kw. Ideally I'd like 5kw to take full advantage. Then I'd have 8kw peak capacity. Also if I went 25kw I'd only get 20kw of storage at 80% DoD so I'd need 5kw to fill it at 5p octopus go
@batalto Are you able to parallel two sofar inverters? Giv energy ac coupled inverters can be paralleled (up to 3) but the ramp up of house loads takes a while (c15 secs) so you’re still drawing off the grid.
I’ve got two 80 amp supplies(in phase) coming in to the house, annoyingly western power wanted over £10k to upgrade to full 3 phase which would have been great for inverter choice and ev chargers etc. That could be 4 hours at 80a x 240v could be 153.6kw just need some grid scale batteries. (Wonder if they sell them 2nd hand).
@mattengineer yes from what I've seen you can have up to 3 in parallel.
You would 100% need grid scale batteries. Most inverters take batteries up to 52v at 100A (so 5kw). However they are usually limited less. It's all about the wire sizes as you would know as well as other things.
I looked at 3 phase - they wanted £5k to bring it across the road. Should have bought a house on the other side!
@batalto Curious western power gave me a similar explanation (excuse) that they would need to upgrade the whole ABC from the transfer on the other side of the road.
If I had the time I would build a 16 prismatic cells (280ah) in series to give a 51.2v nominal battery c11.5kw at 80% depth of discharge.
@mattengineer all those batteries are basically exactly that. Just in a nice box with a BMS attached. Pretty sure Seplos actually sell a DIY kit
https://seplos.com/sale-14412229-meka-25-6v-135ah-3456wh-lifepo4-battery-diy-kits.html
@mattengineer not for the DIY ones. However I assume it's pretty similar given the weight. $350 per unit and 2-4 weeks in shipping. Could be more now
This is interesting as an alternative to battery storage and potentially cheaper in overall cost.
https://www.ovoenergy.com/guides/electric-cars/vehicle-to-grid-technology
- 25 Forums
- 1,438 Topics
- 30.1 K Posts
- 36 Online
- 1,223 Members
Join Us!
Latest Posts
-
RE: Are Octopuses Slowing Consumer Adoption of Heat Pumps?
@jamespa My actual gas usage is 16500kwh & electric...
By Davesoa , 1 hour ago
-
RE: Spacing for roof fixing bolts ?
@heat-pump-newbie I don’t see why they shouldn’t show a...
By Mars , 11 hours ago
-
I have been watching, with interest, the rebuild and re...
By iantelescope , 11 hours ago
-
RE: Noise problems with newly installed Samsung 8kW ASHP
@elton, @kenbone has a lot of Samsung ASHP experience a...
By Mars , 11 hours ago
-
RE: Making best use of Agile with a battery and ASHP
On the subject of automating battery charging schedules...
By jamesw , 12 hours ago
-
RE: ASHP sizing - value of Heat Transfer Coefficient
@jamesw It is very unlikely, if not almost impossible...
By Derek M , 15 hours ago
-
Safety update; RCBOs supplying inverters or storage batteries
BEAMA have issued a safety update (March 2024) regardin...
By Transparent , 18 hours ago
-
RE: Incorrect Billing of Customers with a Smart Meter
Yes, that's the point I'm making in this topic. The B...
By Transparent , 22 hours ago
-
@editor I might offer them plates of Air Sauce to heat,...
By Toodles , 1 day ago
-
RE: Home energy storage & battery register
Hanchu ESS - Home-ESS-LV9.4K (9.4kWh)
By IRMartini , 2 days ago
-
RE: Insulation of flow and return Heat Pump piping
@dr_dongle I saw a YouTube presentation from one of ins...
By Toodles , 2 days ago
-
RE: Jokes and fun posts about heat pumps and renewables
@editor Oh Mars, just as I was becoming interested … To...
By Toodles , 2 days ago
-
Are You Getting the Most Out of Your Renewable Energy?
This article is aimed at you if you have recently taken...
By Majordennisbloodnok , 3 days ago
-
It is certainly possible, using a modbus connection. If...
By cathodeRay , 3 days ago
-
I did another reconnection/ reconfiguration session wit...
By Abernyte , 4 days ago
-
RE: Recommended ASHP installers in Hampshire
@benson After my initial enquiries with Octopus, we had...
By Toodles , 4 days ago
-
RE: Air source heat pump roll call
To help bolster the rather small number of NIBE owners ...
By Steve D , 4 days ago
-
RE: A beginner's journey into DIY home energy storage - no solar!
@editor All good here! I'm happy to say that the system...
By KoRWraith , 4 days ago
-
RE: Say hello and introduce yourself
@fse_bec welcome to the forums, and it’s very generous ...
By Mars , 5 days ago
-
RE: Meter Readings - What are theses meters telling me?
@transparent Hi, I am the landlord of the property, we ...
By Potatoman , 5 days ago
Heat Pump Humour
Latest Topics
-
Spacing for roof fixing bolts ?
By heat-pump-newbie 2 days ago
-
ASHP sizing - value of Heat Transfer Coefficient
By jamesw 2 days ago
-
Incorrect Billing of Customers with a Smart Meter
By KoRWraith 4 days ago
-
Home energy storage & battery register
By Mars 5 days ago
-
Meter Readings - What are theses meters telling me?
By Potatoman 6 days ago
-
Have Octopus Energy discovered a way to Narnia?
By Davesoa 6 days ago
-
Making best use of Agile with a battery and ASHP
By jamesw 7 days ago