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Outdoor Battery Solutions?

 
Energy Storage
Last Post by weoleyric 1 hour ago
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 weoleyric
(@weoleyric)
Eminent Member Member
Joined: 4 years ago
Posts: 20
Topic starter 31/05/2026 8:57 am   [#3031]

I'm interested in hearing about fellow forumites experiences with IP56 outdoor battery storage systems.

For background, we've got an extensive home battery system on our small 3-bedroom semi-detached home already, including two main systems:-

* SolaX X1 Hybrid Series inverter with 2 × SolaX Triple Power 5.8 kWh Batteries for a total of 11.6kWh. This system has an off-grid backup switch, and are fed by 12 x 365W solar panels on our roof.

* 6 x Ecoflow plug-in batteries, including 2 × EcoFlow Stream Ultra X 3.8 kWh, 1 × EcoFlow Stream Ultra 1.92 kWh, 3 × EcoFlow Stream AC 1.92 kWh, for a total of 15.36kWh, fed by various DIY solar panels totalling 2.98kW.

While the SolaX and Ecoflow aren't integrated and don't "talk" to each other, we use Home Assistant, Wonder Watt, plus an Ecoflow CT-clamp smart meter, and 2 x Shelly CT-clamp smart meters to monitor and manage the home usage.

In terms of energy draws, we're running a Nissan Leaf EV, and a Hyundai IONIQ PHEV, and a Daikin ASHP with hot water tank (and Solar iBuddy).

We have an 80A grid connection, and use the Octopus Intelligent Go tariff, with an Ohme Go Commander smart charger and an Ohme (dumb) EV charger. This setup works well and gives us 2330-0530 "cheap" energy (8p kWH) and some nice bonus "cheap" slots during the day (which WonderWatt takes advantage of to top up our batteries).

This will be the first full year that we'll have had the above setup running, but in previous winters, the batteries didn't cover peak-time use of 35kWH during the day, peaking at 50kWH.

So, we're exploring options to expand our battery setup to completely time-shift energy use, even during the coldest, darkest winter days.

The challenge is:-

* We cannot upgrade the Solax battery system, as it is both loft-installed and our existing installer isn't interested in lugging any more heavy batteries into the loft or for building safety regulations.

* The Ecoflow system is limited to 6 x batteries, which we've already maxed out.

* We have no more space for batteries inside our home, so are looking to outdoor units.

Therefore, I'm wondering what our options are to add an additional 30kWh (or similar sized) IP56 rated battery system to an outside wall.

I've been drawn to the Fogstar Energy 48V 40.96kWh IP56 Outdoor Battery System and Cabinet combined with a Victron inverter, but I'm sure there are other options.

Our challenge is finding an installer who will work to combine a new system with an existing setup. Most installers seem to want "green field" sites where they can install a standalone system. Therefore, a secondary question would be, which technically competent and experienced installers (we are based in Newcastle-upon-Tyne in the North East) would forumites recommend for more complex installs.

I appreciate the above is a fairly comprehensive setup, so feedback and suggestions gratefully received!


This topic was modified 1 hour ago by weoleyric

76m² Semi-detached House in North East England
Nissan Leaf 110 kW N-Connecta, 2017 Hyundai IONIQ Premium SE PHEV
Podpoint EV charger
Daikin Altherma 3M ASHP (EDLA04E2V3)
Daikin WLAN Adaptor (BRP069A78)
Daikin 150L Hot Water Tank
Solar iBoost
P1P2 and Home Assistant
SolaX X1 Hybrid Series inverter
2 × SolaX Triple Power 5.8 kWh Batteries
2 × EcoFlow Stream Ultra X 3.8 kWh, 1 × EcoFlow Stream Ultra 1.92 kWh, 3 × EcoFlow Stream AC 1.92 kWh, 1 x EcoFlow River 2 256Wh, 2 x Anker Solix C1000X 1056Wh batteries
12 × 365 W solar panels (roof), 1 × 380 W, 1 × 400 W, 1 × 200 W, 2 × 100 W solar panels (garden)


   
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