Filter and sort
What is a solar pool filter and what is it used for?
A solar pool filter is a pump + hydraulic filtration set designed to move water from the pool through the filter using exclusively photovoltaic energy. Thanks to the MPPT controller or dedicated electronics, it adapts operation to the available irradiation, maintaining the required flow rate and manometric head for water quality. This collection brings together Lorentz PS2 solutions (kit with controller), ZIRI (series XKP and FCP), and other DC options optimized for daytime operation. Lorentz PU units without controller are listed in spare parts and are not part of the operational assortment.
Advantages and limitations
- Energy savings and very low operating cost compared to AC filtration.
- Silent and safe operation, ideal for residential and off-grid properties.
- MPPT control that maximizes filtration hours on partially cloudy days.
- Limitations: production depends on sunlight; to guarantee complete cycles on very cloudy days, backup can be added (see hybrid) or hours can be extended on sunny days with greater PV power.
Representative ranges in the catalog
- Lorentz PS2 with integrated MPPT: PS2-600 CS-17-1 (≈18 m³/h · 12 m) and PS2-1800 CS-37-1 (≈36 m³/h · 14 m).
- ZIRI XKP (solar DC): XKP15-14-48-500 (15 m³/h · 14 m), XKP20-19-72-900 (20 m³/h · 19 m), XKP27-19-72-1200 (27 m³/h · 19 m).
- ZIRI FCP (solar DC): FCP250 (12.2 m³/h · 9 m), FCP750 (20.8 m³/h · 24 m), FCP1100S (29.3 m³/h · 22 m), FCP1500S (36.4 m³/h · 27 m).
How to size your solar pool filter
- Pool volume (m³) and desired daily turnovers (1–3). Target flow rate ≈ volume / effective solar hours (typically 6–10 h/day depending on season).
- AMT (m): sum of geometric height and pressure losses in the circuit (pipes, valves, filter, and accessories). Check the flow-head curve of the model and choose with margin.
- Control and electronics: PS2 includes MPPT in the kit; ZIRI XKP/FCP uses specific DC controllers. PU units without controller are in spare parts.
- Filtration: check compatibility of connections, pipe diameter, and losses introduced by the chosen filter.
- PV array: power and voltage according to the controller's range; cabling sized to limit voltage drop.
Indicative specifications
| Typical flow rate | 12–36 m³/h (depending on model and pool size) |
| Manometric head | 9–27 m (considering losses in the filtration circuit) |
| Power supply | Solar DC with MPPT (PS2 kit) or dedicated DC controller (XKP/FCP) |
| Function | Continuous recirculation/filtration during solar hours |
| Accessories | Pre-filter/skimmer, pressure gauge, check valve, DC protections |
Best practices
- Schedule filtration during hours of highest irradiation; use a timer if appropriate.
- Keep pre-filter and skimmers clean to reduce losses and improve actual flow rate.
- Size the PV array with margin for partially cloudy days; check orientation and tilt.
- Install DC protections (PV disconnect, surge) and check insulation and watertightness of the circuit.
Comparisons and related collections
If you require continuity with grid or generator, see hybrid pool filters (backup in 230 V single-phase). With a stable grid and priority on simplicity, review AC pool filters. For transfers from tanks or irrigation with solar energy, consider solar surface pumps. Find protections and consumables in Accessories and specific units/parts in Spare Parts. Return to the overview at Pool Filters or to Water Pumps.
