Solis 1015 NO-GRID or AC Breaker Tripping: What It Means and What to Do Next
Solis 1015 NO-GRID or AC Breaker Tripping: What It Means and What to Do Next
This guide helps you understand the Solis alarm 1015 NO-GRID / AC MCB tripping at a high level, record useful evidence, and recognise when a qualified installer/electrician or Solis support is required. It stays within a strict homeowner safety boundary: observation only, normal app/router checks, evidence gathering, and escalation.
What “1015 NO-GRID / AC MCB tripping” indicates (high level)
Solis describes alarm 1015 as “NO-GRID / AC MCB tripping” in its support resources. In practical terms, this label suggests the inverter is detecting a grid/AC connection problem or is being disconnected because an AC protective device (an MCB/breaker) is tripping. As a homeowner, you should treat this as a grid-side / AC-side issue that may be intermittent and may require a qualified professional to diagnose safely.
If you are not certain of your exact installed inverter model, stop at identification and escalation steps below—do not guess settings, wiring, or hardware behaviour. This guide is written to be applicable to Solis support cases and the Solis RHI-(3–6)K-48ES-5G European range (including RHI-5K-48ES-5G), but the exact site wiring and protection layout varies by installer and property.
Safety first: what not to do
- Do not open the inverter, battery, meter cabinet, consumer unit, isolators, or any covers.
- Do not touch, test, or measure any electrical conductors, terminals, or cables.
- Do not replace or reset breakers repeatedly if they keep tripping—repeated tripping needs a qualified professional.
- Do not change grid, protection, battery, or commissioning parameters in the inverter menus.
- Do not attempt firmware updates, factory resets, or any “local update procedure”.
Stop and call a qualified electrician/installer immediately if you smell burning, see scorching, hear arcing/crackling, or any protective device will not remain on. If there is any sign of overheating or damage, keep clear and escalate.
Step 1 — Confirm what you are seeing (without touching equipment)
Your goal is to record what the system is reporting, not to “fix” it by interacting with electrical protection devices. From a safe distance, note:
- The exact alarm text and number shown (e.g., 1015 NO-GRID).
- Whether the issue is constant or intermittent (when did it start, how often it happens).
- Whether anything changed recently (utility work, electrical work, storm/outage, internet change).
- Whether you still have normal power in the home (if you are uncertain, do not test; just record what you observe).
If your inverter is in the Solis RHI-5G family, it may have a front screen (the manual notes a 7 inch colour screen) and keypad. Use these only for reading status and recording what you see; do not enter menus to modify settings.
Step 2 — Gather the evidence your installer or Solis support will ask for
Solis provides a support checklist intended to streamline troubleshooting. Use it as a guide for what to capture and share with your installer or with Solis service support, rather than trying to self-diagnose the electrical cause. Keep your notes and images organised; a short timeline is often as useful as screenshots.
Recommended evidence bundle (homeowner-safe):
- Photos of the inverter front (screen showing 1015 if visible), and the surrounding area (showing nothing opened or dismantled).
- SolisCloud screenshots (alarms view, device status, and any visible error history).
- Date/time the alarm first appeared and any repeated occurrences.
- Any recent grid interruption you noticed (power cut, flicker), even if you are unsure.
- Your system identifiers you can read without opening equipment (model name on the exterior label if visible; serial number if visible on the outside only).
Use the official Solis support article list and troubleshooting entry points to make sure you are using the correct platform and terminology when reporting the fault:
Step 3 — Check only what a homeowner can safely check
3A) Check monitoring and connectivity (app/router level only)
Some reports are easier for support to interpret if the inverter is successfully sending data. If you use SolisCloud, verify whether the plant/device is currently updating. If your Wi‑Fi/router has changed recently, record that detail. Do not attempt datalogger resets or network reconfiguration unless your installer explicitly instructs you to.
3B) Confirm the system scope (if you have a Solis RHI 48ES-5G hybrid inverter)
If your system is a Solis RHI-(3–6)K-48ES-5G hybrid inverter, the manual contains important context that can help you describe your installation accurately without performing any technical work:
- The RHI-5G series has a front keypad (ESC/UP/DOWN/ENTER) used to scroll options and access/modify settings. For this alarm, use it only to read/record information—not to modify anything.
- The manual warns that the AC-BACKUP port does not support parallel (three- and single-phase) operation, and that parallel operation will void the warranty. If you suspect anything about backup outputs, note your observation and raise it with the installer rather than experimenting.
- The manual also states the inverter is constructed according to applicable safety and technical guidelines and must be used in installations that meet specified requirements, including permanent installation and compliance with applicable regulations and standards. If you suspect the installation is not as expected (for example, recent building works or changes near cabling), note it for your installer.
When to escalate (and who to contact)
Because alarm 1015 is explicitly associated with NO-GRID and AC MCB tripping, there is a clear point where homeowner steps should stop:
- If an AC breaker/MCB is tripping (especially repeatedly), stop and contact your installer or a qualified electrician. Do not keep resetting a device that trips again.
- If you are uncertain what hardware you have, or you cannot safely read the model/serial from the outside, stop and ask your installer to confirm the installed inverter model and protection arrangement.
- If the alarm persists and you have already captured evidence (screenshots/photos/timeline), contact your installer first; if needed, your installer may raise a case with Solis using the support checklist process.
For product-level context on a common model in this scope (RHI-5K-48ES-5G), you can also reference the Solarboss listing so you and your installer are discussing the same family of equipment:
https://solarboss.ie/products/solis-rhi-5k-48es-dc-hybrid-inverter
What to send in your message to the installer/support (copy/paste template)
You can paste the following into an email or support ticket. Keep it factual and include attachments.
- Alarm: 1015 NO-GRID / AC MCB tripping (as shown)
- When it started: [date/time]
- Frequency: [constant/intermittent; number of times noticed]
- What changed recently: [utility outage, electrical work, router change, etc.]
- Monitoring: [SolisCloud updating/not updating; attach screenshots]
- Photos attached: inverter front/screen and surrounding area (no covers opened)
- Model info (if known from exterior label): [e.g., RHI-5K-48ES-5G]
If your installer asks for additional information, follow their instructions but keep within the safety boundary: no internal inspection, no wiring changes, and no parameter changes.