Notifications
Clear all
Energy Storage
13
Posts
8
Users
8
Reactions
773
Views
22/09/2025 12:17 pm
...
It is true that you can buy a Fogstar 16kWh battery for around £1750 whilst a comparably sized Tesla Powerwall expansion pack will cost in the region of £4000-£5000 (Octopus are offering them at £3773 installed)
However, the Fogstar is not IP rated for outdoor use and has no active thermal management so will find it's usable capacity and charge rate significantly diminished in winter, just when you need it most if relying on it to power a heat pump. Not everyone has the capacity to locate a battery indoors or wants a battery inside the house (I'm looking at my wife), at which point you are going to pay significantly more for a product with IP67/IP55 rating and that has active thermal management to keep the cells in an optimum temperature range when it's -5C outside.
...
Let's also bear in mind that Fogstar supply more than one solution. They certainly do have an IP rated and heated battery solution that, half populated for 20kWh is £4,000 and fully populated to 40kWh is £7,000.
Fogstar Energy 51.2V 40.96kWh IP56 Outdoor Battery System and Cabinet
I'm certainly not providing any recommendations but it does allow for once again comparing like with like.
105 m2 bungalow in South East England
Mitsubishi Ecodan 8.5 kW air source heat pump
18 x 360W solar panels
1 x 6 kW GroWatt battery and SPH5000 inverter
1 x Myenergi Zappi
1 x VW ID3
Raised beds for home-grown veg and chickens for eggs
"Semper in excretia; sumus solum profundum variat"
1
Page 2 / 2
Prev
Latest Posts
-
RE: Say hello and introduce yourself
I suppose as the heat pump transfers heat from the outs...
By Batpred , 14 minutes ago
-
RE: Are We Sleepwalking Into Another Race to the Bottom?
I think the current requirements and installer approach...
By Temperature_Gradient , 14 minutes ago
-
RE: PV Panels on roof in Conservation Area
@colinc Do your own due diligence re reviews etc but...
By Morgan , 34 minutes ago
-
RE: Heat Pump Installers: Competence, Illusion and the Hard Truth Homeowners Must Face
So true, possibly with the exception of people you woul...
By JamesPa , 54 minutes ago
-
RE: Isolating the system for a planned power cut
I hadn't realised your reason for a 100mA trip was due ...
By Transparent , 1 hour ago
-
RE: Midea ASHP – how to set weather compensation
Some things worth mentioning: (1) the Headroom Heat P...
By cathodeRay , 2 hours ago
-
RE: Heating Turned Off but Radiators Still Warm
@9jwr9 I didn't get an answer at the time and there has...
By Pipcart , 2 hours ago
-
RE: Battery storage to run Heat Pump.
@majordennisbloodnok I’m not sure you will be able to r...
By Toodles , 2 hours ago
-
RE: Renewables & Heat Pumps in the News
You've completely missed the point. Old, unpatched so...
By Majordennisbloodnok , 3 hours ago
-
RE: Ecodan Energy Monitoring Pack
@batpred that’s an idea yes. Will look into it
By Carpenterstation , 3 hours ago
-
RE: Havenwise App Help & Forum Support – Get the Most from Your Heat Pump
Thank you. I'll wait for a reply to my e-mail for more ...
By plasfron , 3 hours ago
-
-
PUHZ SW120Y & EHSC-VM2D - Buffer tank to Volumiser
Eventually I was able to find someone here in the Algar...
By DavidAlgarve , 4 hours ago
-
RE: Heat loss calculations and how they work in conjunction with heat pump sizing
@batpred There will be times when the 8 kW heat pump st...
By Toodles , 4 hours ago
-
RE: Anyone still weathering it out with Agile?
We are still on agile and it works ok'ish to charge the...
By Batpred , 4 hours ago
-
@papahuhu I did try Smart+ during the first 2 years but...
By Toodles , 4 hours ago
-
RE: New Fogstar 15.5kWh upright solution
Ah... now I can see a photo,and that changes the advice...
By Transparent , 6 hours ago
-
RE: Who has a V2G EV installation
I appreciate that it is very likely to cause confusion....
By Batpred , 6 hours ago
-
RE: What’s the modern take on advised types of insulation?
I suppose Green indeed... 😁 And everybody has...
By Batpred , 7 hours ago
