Marine electrical and electronics: diagnosis by measurement, documented installation
With an electrical fault, the most expensive method is trial and error by swapping parts. At Care every job starts with measurement: battery capacity test, leak scan and voltage readings are reported - and if it isn't needed, we say so plainly. On installations the unit's serial number, test results and the updated wiring diagram are logged to your file.
Scope
Battery & energy systems
Capacity testing, AGM/gel servicing, lithium conversion projects
Charging systems
Charger unit, alternator, shore power line and isolation checks
Solar & inverter
Sizing based on a consumption calculation, MPPT and inverter installations
Wiring & panel
Leak detection, renewing corroded runs, fuse and panel layout
Navigation electronics
Raymarine, Garmin, Simrad installation and service coordination; autopilot, radar, AIS
Lighting & systems
Navigation lights, LED conversion of interior lighting, windlass and flush-deck electrical work
Specialist pages
How it works
Measurement
Capacity, leak and voltage readings are taken with instruments; the result is reported in numbers.
Written quote
Unit make/model, cable cross-sections and labour as separate line items; alternative pricing is possible.
Documented installation
The serial number record, function test and updated wiring diagram are added to your file.
Tools
Calculation, not guesswork
How many watts of solar, how many amps of battery do you need?
Enter your daily consumption; based on Göcek summer conditions, let's calculate the recommended panel power and battery bank. This is an initial estimate; precise sizing is confirmed with an on-site consumption measurement.
107Ah
Daily consumption
332W
Recommended panel
320Ah
Recommended battery
Values we base a daily 1,280 Wh consumption on: Göcek summer sun ~5.5 hours, system losses ~30%, battery bank 50% usable depth and ~1.5 days autonomy. Output drops on cloudy days and in winter; if panel area is limited, the difference an MPPT regulator makes is worth a panel.
Values are example/initial estimates; shading and real consumption are measured on-site.
Send the result on WhatsAppDoes switching to lithium really pay off?
Not for every boat. Let's compare the 12-year total cost based on your battery bank and usage intensity. Prices are sample/indicative; the exact figure is confirmed with a current quote.
Your current AGM setup may be enough
For this usage, lithium's extra cost does not pay for itself over 12 years.
12-year total
The decision depends on your consumption profile; not a guess, it is calculated with your own numbers.
Send the result on WhatsAppComparison
| Feature | Lead-acid | AGM | Gel | Lithium (LiFePO4) |
|---|---|---|---|---|
| Usable depth | ~50% | ~50% | ~50% | ~80-90% |
| Cycle life | Low | Medium | Medium | Very high |
| Weight | Heavy | Heavy | Heavy | Light |
| Upfront cost | Low | Medium | Medium | High |
| Maintenance | Topping up water | Maintenance-free | Maintenance-free | Maintenance-free + BMS |
See the proof
Real job: charger unit replacement
Diagnosis: output 12.1V (low). Victron unit installed with its serial number logged; handed over with a charge-curve measurement, the difference refunded.
FAQ
Has my battery really reached the end of its life?+
It's measured with a capacity test and reported as 'needed / not needed / can wait'. If there's a recommendation you're unsure about, get an Independent Second Opinion - the first measurement is free and the report is yours.
Should I switch to lithium?+
Not for every boat. We work out the numbers against your consumption profile: on some boats lithium pays for itself in three years, on others the existing AGM setup is enough. You receive the calculation and our recommendation in writing, with reasons.
How many panels do I need for solar?+
It's set by a daily consumption calculation: the fridge, appliances and autopilot hours are added up, then a shading allowance is applied. Calculation, not guesswork - the expected output is written in the quote as a number.
My electronics are old - does it all have to be replaced?+
Usually no: staged upgrading is possible via NMEA bridges. First we draw up an inventory of what works and what doesn't, then offer a phased roadmap to suit your budget.
What do I have in hand after the installation?+
The unit invoice, serial numbers, test results and the updated wiring diagram - all in the job file on your panel. For the next craftsman or surveyor, your boat's electrics are now documented.
What should be done for the batteries in winter?+
A charging setup is arranged and monthly voltage tracking is added to the winter checks; a dead battery is the most common bill of a neglected winter. In the wintering programme this is standard.
On this topic: guides & glossary
For those wondering about the terms: the guide and glossary entries below explain this service in depth.
Let us see your boat on site
Start with a free introductory check; both the quote and the decision in writing.
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