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  • Commercial
  • Residential

Any-Grid™ Hybrid Inverter Charger

The Phocos Any-Grid PSW-H Inverter Charger Series (Pure Sine Wave Hybrid) represents Phocos’ most versatile line of inverters/chargers. Flexibility and reliability are key characteristics of this product line, with a strong potential for cost saving opportunities in real world conditions. The Any-Grid PSW-H converts DC (Direct Current) energy into AC (Alternating Current), with multiple advantages beyond standard inverters. This product includes an integrated MPPT charge controller and can function as an AC to DC battery charger, which provides flexible energy access solutions in a broad range of applications.

The battery can be charged from solar and/or an AC source (public grid or generator), with easily programmable priorities. The Any-Grid PSW-H can function without an AC source or alternatively even without solar, as a pure uninterruptible power supply (UPS). When the utility grid or AC generator fails, the Any-Grid PSW-H immediately switches to ‘Off-Grid’ mode within 10 ms (typical, in UPS mode) to securely power the loads at all times. Solar can be set as the priority energy source to save electricity costs. 

The Any-Grid PSW-H can function in a battery-free mode. In this mode, for installations with stable public grids, grid energy consumption can be reduced without the need to invest in a costly battery bank. Additionally, power can be supplied directly to loads from the grid and solar simultaneously.

This unit comes with one to two quality, integrated MPPT charge controller(s). The controller(s) accept(s) particularly high PV voltages, allowing many PV modules to be connected in series, decreasing installation cost and avoiding combiner boxes. Up to 9 inverters can be connected parallel, 3-phase or split-phase for up to 58.5 kW of synchronized AC power.


Frequently Asked Questions

  • Are all the MPPT charge controllers from the inverters individual or are they hooked up to each other?

    If you use more than one Any-Grid PSW-H unit then each one will handle its own PV array and the PV modules may not be inter-connected between more than one unit. So if you are multiplying the number of devices you are also multiplying the number of MPPT’s and the MPP trackers work independently of each other. This optimizes the PV harvest with partial shading or other suboptimal situations.

    For PSW-H models that have two MPPTs, these are also independent from each other and may not be connected to the same PV array at a time. So a small PV array would be connected to just one MPPT with the other MPPT left unconnected. A large PV array would be separated so that half of it connects to one, and half to the other MPPT. This also brings advantages in shading situations or allows connecting different models of PV modules to each MPPT.

  • Can different types of lithium batteries be used?

    Yes, multiple different lithium battery models are supported in terms of a BMS (battery management system) communication link between the battery and Any-Grid PSW-H. We have very many different battery settings and as long as your battery has 48 ~ 54 Vdc nominal voltage, you can modify the settings of the Any-Grid PSW-H to cater toward those batteries. For batteries where we do not support BMS communication, make sure the batteries will function even without such communication and will not simply shut down after some time. Our list of list of supported batteries with BMS communication can be found here and is updated regularly.

  • How is a surge protective device (SPD) correctly sized for a DC power system?

    Example: Lightning strikes or irregularities on the utility grid can create voltage spikes beyond the power equipment’s maximum voltage ratings.

    A surge protective device (SPD) is designed to prevent higher energy voltage peaks from reaching sensitive equipment and thus potentially causing damage.

    If properly designed, how does an SPD work in a power system?

    • Excess voltage (beyond the rating of the equipment) is prevented from building up by controlled energy discharge between the affected DC or AC conductors.
    • If a ground connection is present on the SPD, the SPD also monitors voltage differential between ground and the other conductors. If necessary, energy is discharged to prevent excessive voltage differences such as in a surge event. For this to work properly, the path to ground must be of low resistance.
    • SPDs cannot protect from prolonged over-voltage for multiple seconds or minutes. This must be prevented by correct system sizing.

    Steps to ensure your equipment will not get damaged when a surge in voltage takes place:

    1. Make sure your system and SPD has a good, low-resistance connection to ground.

    2. Match the SPD to the inputs of your power conversion equipment you want to protect by ensuring the “Uc” voltage in the SPD datasheet is at or just slightly (preferably 0 to 10 V) above the maximum continuous voltage on the conductors to be protected, or the maximum voltage rating of the power equipment connected. If the SPD’s “Uc” rating is well above the maximum voltage rating of the power equipment connected, it can no longer effectively protect from voltage surges. The SPD will protect devices or equipment by activating well above the maximum continuous operating voltage “Uc” and will not interfere at voltages below “Uc”.

    3. Phocos recommends protecting at least the PV input of the charge controller or inverter/charger and if using a public electric grid, protect the AC input as well.

    4. If used on the PV conductors, ensure the SPD is rated for DC voltages, if used on the AC input, ensure the SPD is rated for AC voltages.

  • Is it possible to continue feeding the AC consumers with the battery (without injecting) when the grid has failed?

    Yes, if the grid fails and the AC input voltage drops below a threshold voltage or the frequency drops out of the window of 40-65 Hz the Any-Grid PSW-H will declare the AC source invalid and will disconnect it completely by mechanical relays. The Any-Grid PSW-H will then automatically act as an Off-Grid inverter within 10 milliseconds and provide power to your loads without any risk of back-feeding into the grid because it is then galvanically isolated from the grid on both neutral and line wires.

  • What is the largest and smallest battery bank one can use with Any-Grid PSW-H Inverters?

    When it comes to pairing battery banks with your Any-Grid PSW-H inverter, the main thing you need to consider is nominal voltage. That is, if you have a 24 Vdc inverter, make sure that you have a 24 Vdc battery bank. In terms of bank size, theoretically there is no upper limit, but there is a practical one. This is heavily influenced by overall system size, budget, and of course space. Whatever your battery bank size may be, it is important to have a good quality bus bar and correct wiring cross-section. As for the minimum size, we recommend at least 200 Ah of battery capacity per PSW-H, if lead-based batteries are used. For lithium batteries smaller battery sizes may be usable, but make sure the battery and its battery management system (BMS) can handle the current requirements of the inverter(s) for both charging and discharging.

Get In Touch Not sure what you need? Talk to the experts!

Americas
USA

Phocos Americas, Inc.
Tucson, AZ USA
Phone +1 520 777-7906
Info.na@phocos.com
EMEA
Germany

Phocos AG
Ulm Germany
Phone +49 731 9380688-0
info@phocos.com
SAARC
India

Phocos India Solar Pvt Ltd.
Puducherry - India
Phone +91 413 2972328
info-india@phocos.com
APAC
China

Phocos China Ltd.
Qingdao China
Phone +86 532 83837020
info-china@phocos.com
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