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    About us

    In stock, ships within 24h
    In stock, ships within 24h
    We keep products in stock and dispatch your order within 24 hours.
    9 out of 10 customers return
    9 out of 10 customers return
    As many as 9 out of 10 customers come back to us for their next project.
    4.9★ rated by installers
    4.9★ rated by installers
    Professional installers rate us an average of 4.9 out of 5 stars.
    One partner for the whole project
    One partner for the whole project
    A complete range from one partner – no juggling multiple suppliers.
    Most popular
    Solis S6-EH3P10K-H-EU
    Official distributor
    €1 160,58 –10 %
    Solis S6-EH3P10K-H-EU
    On the way (>10 pcs)
    €1 272,35 incl. VAT
    €1 034,43
    23002150052
    Dyness Tower Pro TP11
    Dyness Tower Pro TP11
    In stock (>10 pcs)
    €3 142,65 incl. VAT
    €2 555
    DYNESS-TOWER-PRO-TP11
    ET(ETPlus+) 33
    Goodwe GW10K-ET Plus+
    On request
    €0 incl. VAT
    €0
    GW10K-ET
    ET(ETPlus+) 33
    Sale
    Goodwe GW8K-ET Plus+
    On request
    €0 incl. VAT
    €0
    GW8K-ET
    Dyness Tower T17
    FREEFREE €3 530 –100 %
    Dyness Tower T17
    On request
    €0 incl. VAT
    €0
    DYNESS-TOWER-T17
    Tigo TS4-A-O
    €31,50 –4 %
    Tigo TS4-A-O
    On the way (>10 pcs)
    €37,20 incl. VAT
    €30,24
    Measure price: €30,24 / 1 pcs
    462-01252-32
    15K 1
    FREEFREE €5 499 –100 %
    Soluna 15K HV
    On request
    €0 incl. VAT
    €0
    SOLUNA-HV-15K
    Sale
    ET(ETPlus+) 33
    Sale
    Goodwe GW8K-ET Plus+
    On request
    €0 incl. VAT
    €0
    GW8K-ET
    ZENCAR Model W Pro (Basic, Type 2, 16A, 5m)
    Sale
    €324,39 –25 %
    ZENCAR Model W Pro (Basic, Type 2, 16A, 5m)
    In stock (1 pcs)
    €299 incl. VAT
    €243,09
    ZENCAR_W-PRO_T2_16A_5M_3P_BASIC
    New
    Victron MEGA-fuse 250A/58V
    Victron MEGA-fuse 250A/58V
    On request
    €0 incl. VAT
    €0
    VICTRON-MEGA-FUSE-250A-58V
    Victron MEGA-fuse 125A/32V
    Victron MEGA-fuse 125A/32V
    On request
    €0 incl. VAT
    €0
    VICTRON-MEGA-FUSE-125A-32V
    Victron Isolated DC-DC Converter Orion-Tr 24/48-8.5
    On request
    €0 incl. VAT
    €0
    VICTRON-IS-DCDC-ORION-TR-24-48-8.5
    Victron MEGA-fuse 80A/32V
    Victron MEGA-fuse 80A/32V
    On request
    €0 incl. VAT
    €0
    VICTRON-MEGA-FUSE-80A-32V
    IBC FlexiSun 1x6mm² red 100m
    On request
    €0 incl. VAT
    €0
    2478
    Victron Zigbee to USB converter
    Victron Zigbee to USB converter
    In external warehouse (>10 pcs)
    €100,74 incl. VAT
    €81,90
    VICTRON-ZIGBEE-USB-CONVERTER
    Victron Busbar 250A 2P 12 Screws
    Victron Busbar 250A 2P 12 Screws
    In external warehouse (>10 pcs)
    €51,81 incl. VAT
    €42,12
    VICTRON-BUSBAR-250A-2P-12S
    Victron MPPT Control
    Victron MPPT Control
    In external warehouse (>10 pcs)
    €51,81 incl. VAT
    €42,12
    VICTRON-MPPT-CONTROL
    GX WiFi module long range (Netgear AC1200)
    Victron GX WiFi module long range (Netgear AC1200)
    In external warehouse (>10 pcs)
    €136,23 incl. VAT
    €110,76
    VICTRON-GX-WIFI-MODULE-LONGRANGE
    Victron Lynx Distributor (M10)
    Victron Lynx Distributor (M10)
    On request
    €0 incl. VAT
    €0
    LYN060102010
    Victron MEGA-fuse 300A/58V
    Victron MEGA-fuse 300A/58V
    On request
    €0 incl. VAT
    €0
    VICTRON-MEGA-FUSE-300A-58V
    Victron SmartSolar Control display
    Victron SmartSolar Control display
    On request
    €0 incl. VAT
    €0
    VICTRON-SS-CONTROL-DISPLAY
    New Articles
    The Dyness Tower is ending: move to Tower Pro and Stack
    The Dyness Tower is ending: move to Tower Pro and Stack
    Dyness is discontinuing the original Tower (T7–T21) series and replacing it with a new generation of high-voltage storage. The direct successor for homes is Tower Pro; for...
    Read article
    ONSA Plus at the First Green Energy Fair in Zagreb
    ONSA Plus at the First Green Energy Fair in Zagreb
    The first edition of the Green Energy Fair took place at Arena Zagreb (29-30 October 2025), and ONSA Plus was proud to participate among the regional renewable-energy community....
    Read article
    ONSA Plus at Smart Energy Forum Prague 2025
    ONSA Plus at Smart Energy Forum Prague 2025
    ONSA Plus participated in this year’s Smart Energy Forum in Prague, one of Central Europe’s premier events dedicated to solar energy, energy storage, and smart...
    Read article
    About us
    Description

    Photovoltaic power plants for companies with high consumption

    We’ll design the optimal photovoltaic solution for your energy-intensive operation and handle all the paperwork, including subsidies. We know how to do it right. So it will keep saving you money even in 20 years

    • We’ll reduce your electricity costs
    • We’ll provide a stable backup source
    • We’ll increase cost predictability
    More information

    Latest discussion

    OP Avatar of author

    Corsair 18AWG-Kabel für 8-polige auf duale 6+2-polige Stromversorgung

    ONSA Plus | 22.03.2023 |
    Corsair 18AWG Kábel pre zdroj 8pin na dual 6+2pin
    Dobrý deň, nie, nejedná sa o origninál. Kábel má však rovnaký pinout (type 4), teda pasuje na zdroj a dá sa bezpečne používať. Je dôležité overiť kompatibilitu s Vaším zdrojom na stránkach výrobcu.

    Latest rating

    Fronius Ohmpilot 9.0-3

    Fronius Ohmpilot 9.0-3

    The product rating is 5 out of 5 stars. Marian Zavadský | 03.09.2025
    spoľahlivo funguje už viac ako 4 roky. v nastaveniach sa da krásne nastaviť podmienky. dobre funguje aj s 6x1kw špirálami, zapojenými paralérne. po zapojení si sám zmeria špirály. od marca do novembra mam dosť teplej vody ak nepoužívam bazén. menič najpr dobije baterie a potom dáva prebytky do akumulacky.
    10-capacitor GPU Riser 012

    10-capacitor GPU Riser 012

    The product rating is 5 out of 5 stars. 19.11.2022