I’m finalizing the wiring plan for a high-power install in Croydon (100A DNO service) and wanted to get some community feedback on the topology. I'm trying to avoid bottlenecks and ensure maximum reliability for a 15kVA system.
The Main Question: Does it make sense to go with a Henley Block split to run the House, EV, and Solar in parallel? I’m leaning toward this so a domestic fault/trip in the house doesn't take down the Solar export or battery charging.
Specific Hardware:
- Inverter: Victron MultiPlus-II 15kVA
- Battery: 48kWh Fogstar
- Solar: 12kW Array
- EV Charger: Victron EV Charging Station (via Garo PEN protection box)
Proposed Topology:
Plaintext
DNO Cutout (100A Main Fuse)
↓
Import Meter (Landis+Gyr E470)
↓
[ CT CLAMP ] <--- (Placed BEFORE the split to see total site load)
↓
HENLEY BLOCKS (100A Parallel Split)
│
├───> MAIN CONSUMER UNIT (House Loads: Oven, Lights, Sockets)
│
├───> GARO GS8EV40PMEB (EV Protection: 40A Breaker + PEN Fault Detection)
│ ↓
│ Victron EV Charging Station (32A / 7.4kW)
│
└───> SOLAR DB (The Energy Hub)
↓
[ 63A MCB/Switch ] <--- Hardware Safety Brake
↓
Victron MultiPlus-II 15kVA Inverter
↓
(SOFTWARE SETTING: AC Input Limit = 80A)
A few points I'm weighing up:
- The 63A Breaker: I’m keeping a 63A physical breaker on the Inverter line as a "fail-safe" but setting the Victron software (ESS) to an 80A Grid Limit to protect the 100A main fuse using the CT clamp.
- Reliability: In this parallel setup, if the house main switch trips, the Inverter stays online to continue exporting/charging.
- EV Setup: Using the Garo box for PEN protection to avoid an earth rod on a PME supply.
Does this look like a solid "pro" approach, or am I over-complicating it? Would love to hear from anyone running a similar 15kVA setup. What other approaches do you recommend?
Kind Regards,
u/Acceptable_Party7361 — 17 days ago