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Products for the Sun2000/1000G2 GTIL

The Sun2000/1000G2 is an inexpensive (under $400) grid tied inverter with a unique feature of having a limiter (current transformer or CT) that prevents power from being exported back to the grid. We have developed products for the Sun2000/1000G2 that will enhance its value considerably.

SunBeam -The most advanced remote control for the Sun2000/1000  This is a DIY kit that allows you to remotely control your Sun2000/1000 via a web browser and/or a MQTT broker using WiFi. Not only can you remotely monitor your inverter's status, but you can remotely modify any of the power generating parameters. It is much better than the cloud-based WiFi option which only allows for remote monitoring and no changes to any of the settings of the Sun2000/1000. 

1 small PCB assembly with external antenna with cable

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Home page of the web browser interface

SunBeam has no cloud dependency so it will always work and you're in total control of all your data forever. SunBeam's MQTT feature allows you to integrate third party home automation and graphing software such as Home Assistant.

Easy to integrate into Home Assistant.  Instructions included with sample dashboard

In addition, you can have other MQTT devices interact directly with the Sun2000/1000 such as chargers or consumption meters. SunBeam is installed inside your unit. Installation is easy and involves just unplugging an existing cable, and plugging it onto the SunBeam board and then plugging SunBeam's cable to where the first cable was unplugged. The antenna is fed through one of the vent holes.

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Some of the features include

  • Operates without any Cloud or App

  • 2.4 GHz WiFi based using any web browser

  • Easy to use HTML interface

  • Can operate standalone or connected to your home WiFi

  • View status and send commands remotely

  • Two modes of control - Use LCD Screen to control as usual or Remote Control which disables LCD Screen control.

  • Inverter status appears on both the LCD Screen and web browser independent of control mode

  • Remote Control mode duplicates all status and control features of the Sun2000/1000 G2 except for the LCD backlight control

  • Added feature to existing:  support to integrate external State of Charge (SoC) data via MQTT.

  • Added feature to existing:  limit by SoC

  • Added feature to existing:  4 work timers for Remote Control mode

  • Added feature to existing:  each remote control work timer can assign a different current or power or SoC limit

  • MQTT data support for integration into third party home automation software such as Home Assistant.  Free sample dashboard and supporting files

  • Basic API support

  • Mounts inside the Sun2000/1000 GTIL2 with antenna fed through a vent hole on top

  • Automatic time and date updates including daylight savings time when connected to the internet

  • Automatic over the air updates when connected to the internet

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To see a live demo of this product in action being used as a battery inverter, please go to this page.

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SplitCT Kit for split phase power - The Sun2000/1000 is shipped with only a single CT (current transformer) used to limit the power exported to the grid. This only works well if you have a balanced load which is not a practical use case. The SplitCT Kit has a modified CT called SplitCT and a Y Cable Adapter. This kit is designed to be easily installed and to provide accurate results regardless if the loads are balanced or not. There is also no need for any calibration/adjustments and it works with your existing stock CT to save you money. Note, the SplitCT Kit is only needed on the odd inverter if you have an odd number of inverters. For each pair of inverters, you can use the included CTs and hardwire them all in parallel or just purchase a Y Cable Adapter and Splitter Cable for a cleaner installation.  For example, if you have 5 Sun2000/1000s (all on 240 V), then you will need to purchase 1 SplitCT Kit, 2 Y Cable Adapters and 2 Splitter Cables.

SunScreen. Protection from brownouts for the older Sun2000/1000 (before 2025).  This is a DIY kit that you install inside the Sun2000/1000 which can improve your unit's robustness and reliability. If you live an area where the utility grid is unreliable such as during thunderstorms, construction work,  etc., then this product is for you. SunScreen is basically a mini UPS (Uninterruptible Power Supply) that keeps the power flowing to the most critical parts of the inverter (namely the inverter's microcontroller and the transistor driver circuits) so that your inverter does not experience brownouts. When a microcontroller is in a brownout state (basically partially on and off, as when its supply voltage is right below the minimum recommended level), the firmware is in an unpredictable state. This can cause the outputs that controls the power transistors to inadvertently turn on at the wrong time resulting in widespread damage to the inverter. SunScreen ensures the inverter's microcontroller is running 100% of the time during a brownout so that the outputs are always controlled as designed to allow it to properly react to changing conditions as for both the AC and DC sides.

The included rechargeable battery lasts at least 11 hours on a full charge and when the the battery is too low, it will automatically turn off in less than a millisecond never allowing the microcontroller to go into the brownout state. The battery automatically recharges when the grid power is restored. The battery life should exceed the life of the inverter. SunScreen is maintenance-free.

Installation is easy and involves just unplugging an existing cable, and plugging it onto the SunScreen board and then plugging SunScreen's cable to where the first cable was unplugged.

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