Sunsynk 3.6 kVA single phase inverter with 5.12 to 15.96 kWh battery options for small commercial solar

Sunsynk 3.6 kVA / 5 kVA / 8 kVA Inverter with Battery

Scalable Commercial Inverter and Battery system

Features at a glance

Scalable Commercial Inverter and Battery System

Most homes and small businesses do not need the largest system available, they need the right one. The Sunsynk single phase hybrid range covers 3.6kVA, 5kVA and 8kVA, all in an IP65 enclosure rated to mount outdoors without a separate weatherproof housing. Every model delivers roughly double its rated output for 10 seconds, which is what carries a fridge compressor, borehole pump or pool pump through start-up without tripping the system.

All three models accept meaningfully more solar than their AC rating, from 4,680W on the smallest up to 10,400W on the 8kVA, so the array can be sized for winter generation rather than for a perfect summer day. Battery charge current runs up to 190A, which matters on a schedule of repeated outages where the bank needs to be full again before the next one. Staying within one range also means the battery and monitoring stay the same if the inverter is upgraded later.

Product Features

  • Right-Sized Output
    Three single phase models at 3.6kVA, 5kVA and 8kVA, delivering maximum apparent output of 3,960VA, 5,500VA and 8,800VA. Specify to the actual load rather than paying for capacity that sits idle.
  • Handles Start-Up Surge
    Peak output power of 7,200W, 10,000W and 16,000W for 10 seconds, roughly twice the continuous rating on every model. This is the specification that determines whether a pump or compressor starts cleanly.
  • Outdoor Rated Enclosure
    IP65 rating with Class I protection throughout, so the unit can be wall mounted outside without building a housing for it. On a site with no suitable indoor wall this removes a real installation cost.
  • Solar Compatibility
    Maximum PV input of 4,680W, 6,500W and 10,400W across the three models, comfortably above each AC rating. Dual PV inputs at 13A + 13A on the smaller units and 22A + 22A on the 8kVA.
  • Wide Solar Operating Window
    PV input voltage from 125V to 500V with MPPT tracking from 150V to 425V, giving flexibility in how strings are configured and keeping production going through variable light.
  • Fast Battery Recovery
    Maximum battery charge and discharge current of 90A, 120A and 190A, so the bank recharges quickly between outages rather than starting the next one half full.
  • Built For Local Conditions
    Ambient operating range of -45°C to 60°C, with derating above 45°C. Rated well beyond anything a Cape Town summer will produce.
  • Standard 48V Battery Platform
    48V nominal with a 40V to 60V working range, compatible across the Sunsynk battery lineup and with the wider 48V ecosystem.
  • Grid-Friendly Output
    Power factor adjustable from 0.95 leading to 0.95 lagging, giving the flexibility to meet utility requirements on a commercial connection.

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Customer References

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The trust we have earned

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Ernst Seegers profile picture
Ernst Seegers
23 July 2026
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Very rarely do you find a person with such diligence, focus and attention to detail as I have from the service rendered by Mr Carlos da Silva.
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Emily Pestana profile picture
Emily Pestana
17 July 2026
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The service team and support were fantastic in dealing with my machine even though it’s definitely a much older model
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Carlitos Da Silva profile picture
Carlitos Da Silva
17 June 2026
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Great to see some places still doing honest business. I recently sourced an inverter for my small business from Oxbow and was amazed at how much care and consideration they gave to my purchase. I had a salesperson on site for assessment and within a week had my inverter installed and functioning perfectly. Very impressed with their service and urgency.
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Damian profile picture
Damian
5 May 2026
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We recently upgraded to a Fujifilm C750 through Oxbow and the improvement in print quality has been noticeable immediately. Their technician handled everything from delivery to network setup and even configured scan-to-email for the whole team. What stood out was how smoothly the transition happened without any downtime.
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Eden K profile picture
Eden K
22 April 2026
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We chose a Fujifilm device through Oxbow after comparing a few options. Their consultant gave us honest advice based on our usage rather than pushing the most expensive option. The machine has performed well so far. Appreciate the transparency.
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Richard Ayim Annor profile picture
Richard Ayim Annor
10 December 2025
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Beautiful