Victron + Fronius Micro-Grid Design
When the grid is absent, unreliable, or you want full site energy autonomy, we engineer around a Victron VE.Bus inverter/charger core, DC-coupled PV via high-power MPPT chargers, optional Fronius GEN24 AC-coupled solar, and battery banks sized to your overnight and backup loads.
Victron hub
Victron MultiPlus II and Quattro units act as the AC-forming inverter/charger at the heart of many off-grid and islandable sites. Quattro adds dual AC inputs (for example grid plus generator) and split-phase options where your site needs it. Parallel and three-phase scaling is available for larger bus and farm loads.
Compact inverter/charger with VE.Bus control, strong charger current for battery recovery, and proven integration with Venus OS, DVCC, and modern lithium BMS signalling.
Manufacturer warranty: 5 years from purchase; up to 10 years when the unit is registered on Victron Professional within the required window (per Victron published programme — see datasheet).
Victron support & downloads
Step-up when you need two AC sources, higher power classes, or split-phase delivery. Common choice for rural homes, workshops, and dairy support loads where sequencing between grid, generator, and battery matters.
Manufacturer warranty: 5 years from purchase; up to 10 years with Victron product registration per programme terms (see datasheet).
Victron support & downloads
Victron SmartSolar MPPT RS chargers suit large PV strings onto the DC battery bus with high PV voltage capability and remote monitoring. Ideal when you want a large DC-coupled array alongside—or instead of—AC-coupled Fronius PV.
Manufacturer warranty: 5 years; extension to 10 years where the Victron programme applies (per model — see datasheet).
Victron MPPT datasheetsBattery voltage and charge limits are matched to your selected BMS and battery brand, including DVCC where applicable.
Auto-start, quiet hours, and minimum SOC rules are programmed around how you actually run the property day to day.
ESS-style AC coupling with Fronius is model and firmware dependent, so we confirm compatibility and control strategy before lock-in.
Battery options
Battery chemistry, voltage class, and BMS integration drive inverter settings and warranty outcomes. We match BYD Battery-Box LVS low-voltage cabinets, Freedom Won eTower lines, or SIMPO-5000 class banks to your Victron design once daily kWh, peak kW, and temperature exposure are understood.
Photography may show related BYD cabinet families; your written proposal lists the exact Battery-Box LVS configuration and Victron integration path.
Low-voltage lithium expansion in modular towers, widely used in Victron-led designs where certified DVCC integration and clear comms wiring matter. Final module count follows your depth-of-discharge and backup hours targets.
Manufacturer warranty: 10 years limited (BYD Energy Storage; per region and product generation — see BYD module warranty statement).
BYD battery product family
Indoor Freedom Won LiTE2 Home 15/12 storage with a strong track record where quality and serviceability are priorities. Sizing ties to inverter charge limits, C-rate expectations, and whether the site is off-grid full-time or backup-first.
Manufacturer warranty: per Freedom WON published terms for the LiTE2 series (see datasheet / warranty document).
Freedom Won product information
Where SIMPO-5000 fits your voltage and BMS profile, we integrate it into the same Victron supervision model with clear charge/discharge envelopes and alarm handling.
Manufacturer warranty: per supplier documentation supplied with your system (SIMPO-5000 / cabinet OEM — see build package).
AC-coupled PV
A Fronius GEN24 Primo or Symo can operate as AC-coupled PV on the same micro-grid as Victron, subject to firmware, power limits, and frequency-watt control settings. This path suits customers who want a premium PV inverter with strong monitoring while Victron handles battery, generator, and critical AC bus formation.
We set up GEN24 so production respects battery state of charge and site demand, aligned with Victron control and any export limitation you require.
Fronius inverter warranty: 10 years (manufacturer; per model — see Fronius datasheet).
Fronius technical data
Where a hybrid pathway simplifies future grid connection or backup expansion, we map Fronius and Victron responsibilities so you are not double-paying for the same function.
Inverter / battery path: 10 years Fronius inverter; Reserva battery per Fronius pack warranty when quoted.
Fronius datasheets
On suitable sites, Ohmpilot can divert excess solar into hot water or thermal loads, lifting self-consumption even when the primary story is off-grid resilience.
Warranty: per Fronius Ohmpilot documentation.
Ohmpilot technical dataAC coupling rules change with firmware and region. We confirm the exact GEN24 + Victron pairing for your project before build.
Ground mount
Where roof space, orientation, or structural loading pushes PV to the ground, Clenergy SolarTerrace™ II-A offers a pre-assembled ground mount system aimed at faster site assembly and consistent rail geometry. We engineer array size, row spacing, and foundation detail for your soil, wind zone, and panel choice.
Design inputs
| Topic | Why it matters |
|---|---|
| Load inventory | Peak kW sets inverter class; daily kWh sets battery energy; motor starts set surge headroom. |
| Generator | Fuel type, auto-start, and acceptable run hours influence Quattro input wiring and battery charging strategy. |
| PV yield | DC MPPT string design versus AC-coupled Fronius kW affects harvest shape, especially in poor sun weeks. |
| Future grid | If mains may arrive later, we leave a clean architectural path so you are not ripping out core hardware. |
Share your site details and run the quick future load calculator below. The calculated load result is included in your enquiry so we can size your system faster and more accurately.
