There is a kind of solar company that sells you an off-grid installation with an expert face… and then switches the phone off at 15:00. Saturdays: no. Sundays: no. Public holidays: even less. If the power dies on a Saturday night on a farm with no grid, you get an answering machine and a generator you thought you had buried for good.
That is not a commercial detail. On a grid-tied system, a fault is a nuisance. On an off-grid system, a fault is life shutting down: fridge, water pump, alarms, internet, heating, work. There is no “the street will come back”. There is no grid. Only your system… and whoever truly maintains it.
Off-grid is not “villa solar with a bit of backup”
An off-grid installation (no utility connection, or a grid so weak it does not count) is a critical system:
- panels + hybrid inverter / charger + batteries (and sometimes a backup generator),
- load management, priorities, battery SOC,
- comms, firmware, protections,
- and a much tighter error margin than grid-tied self-consumption.
When something fails on a Tuesday at 11:00, almost any installer “answers”. The serious question is another: who picks up on Saturday at 19:00, on an August Sunday or on 1 January, when the battery is at 8% and the fridge starts to smell?
If your off-grid installer does not support outside office hours, you do not have an energy partner. You have a fitter with a town-hall timetable.
The pattern we see (and nobody puts on the quote)
Not theory. It is the pattern when an off-grid customer calls in panic:
- The company installed (sometimes cheap, sometimes “off-grid specialist”).
- In the contract or the pitch: “maintenance”, “warranty”, “we’re here for whatever you need”.
- In practice: support Monday to Friday, mornings. After 15:00, voicemail. Weekends and holidays: radio silence.
- The customer discovers the hours on the day the system stops being a PowerPoint and becomes a dark house.
That gap is not an “unforeseen event”. It is a business model: charge for the off-grid build (expensive, technical, with margin) and outsource weekend risk to the customer. While the sun shines and the battery holds, nobody complains. The day a BMS, contactor, firmware or config error fails… the calendar eats your emotional warranty.
Why “always-on” support is not a luxury off-grid
1. There is no grid to save you
In a home with a utility meter, if the inverter dies you still have lights (even if you pay the bill). Off-grid, if the system dies, there is no municipal plan B. Support is not “improving self-consumption”: it is continuity of life and business (farm, irrigation, rural lodging, cold storage, remote work).
2. Faults do not respect office hours
Real faults arrive when you lean hardest on the system: weekends at the country house, long weekends, Christmas, summer with AC and guests. Exactly when the “specialist” company has hung the closed sign. A ticket on Monday at 09:00 will not unfreeze what spoiled on Saturday.
3. Off-grid is diagnosis + fast decisions
Often you do not need to swap an inverter that same Saturday. You need someone who will:
- check telemetry / alarms,
- tell you if it is safe to start the generator,
- shed non-critical loads,
- or send someone today, not “Tuesday if there is a slot”.
That only exists with real human support outside 9–15. A generic email does not cut a load. A WhatsApp at 22:00 can save the battery.
4. Maintenance without a duty rota is theatre
“We maintain off-grid systems” sounds good on LinkedIn. If that maintenance only exists in office hours, it is shop-window maintenance. Off-grid, maintaining also means being there when the system asks for help.
Questions to ask before you sign an off-grid quote
Do not ask only about kWh and €/kWp. Ask this, in writing:
- Do you cover Saturdays, Sundays and public holidays? Until what time?
- Is there a duty phone / WhatsApp, or only a web form?
- Who decides an emergency visit? In what time?
- Do you monitor the system and alert us, or wait until I notice in the dark?
- If the “off-grid tech” is on holiday in August, who covers?
If the answer is an awkward silence or “in office hours…”, you already know what you are buying: a critical installation with Monday-to-Friday morning SAT.
How we approach it at A Todo Sol
We install off-grid (farms, areas without grid, projects where the street is not an option). And we do not sell office-hours support for a system that must live seven days a week:
- We install and support on Saturdays, Sundays and public holidays — when you are at the farm, not when the salesperson is at the desk.
- Real technical support, not a “we’ll reply in 48 business hours” mailbox.
- Monitoring with our own criteria (strings, alarms, odd behaviour): we prefer to find out before your fridge dies.
- If a weekend visit or workaround is needed, we fight for it. Off-grid does not understand “come back on Monday”.
Off-grid, the best inverter in the catalogue is worth little if nobody answers the phone on Saturday.
Conclusion
There are companies that install and maintain off-grid systems… until 15:00, Monday to Friday. That may work for an office. It does not work for a home or business that lives on its batteries.
If you are looking at an off-grid offer, look at the price — and look at the support calendar. Because the day it fails, you will not need a warranty PDF. You will need someone who answers.
If you have an off-grid system (ours or someone else’s) and they left you hanging outside hours, talk to us. We prefer to tell you the truth about support before selling you more kW.