Marine, mobile & remote power systems
Online system design
A complete electrical plan for your boat, so you can build it right the first time.
We supply exactly what you need and nothing you don't, with exact quantities and cut lengths. Quality parts that are hard to source, field tested, and field technician approved.
Start my system designExample designs
EXAMPLE Example A: twin-engine lithium
- The house bank changes to lithium.
- Each engine charges it through a DC-DC charger.
- Fuses protect the bank and the inverter/charger.
Custom-designed to your spec.
Start my system design
EXAMPLE Example B: lithium conversion
- Lithium batteries replace the old house bank.
- Each battery has its own fuse, and a main fuse protects the bus.
- A battery monitor shows the battery state.
Custom-designed to your spec.
Start my system design
EXAMPLE Example C: sailboat charging
- An alternator and solar charge the house bank.
- A DC-DC charger keeps the start battery charged.
- A load analysis compares daily use with the charge sources.
Custom-designed to your spec.
Start my system design
Add optional remote monitoring: built to alert on low battery, high temperature and loss of reporting.
Start my system designWhat you get
We use ABYC guidelines as the reference.
System summary.
Your goal and the key decisions on one sheet.
One-line diagram.
Every battery, charger, fuse and wire run, with wire labels.
Energy budget.
Your daily loads, and the battery and charging they need.
Wire and fuse sizing.
Sized from your run lengths.
Parts list.
With maker part numbers.
Installation notes.
What to check aboard before and during the build.
Who it's for
- DIY owners who install the system themselves.
- Remote boats. We work from your photos, measurements and load list.
- Off-grid builds: vans, RVs and cabins.
The process
Start your quote. Tell us about your boat and your goals. We confirm the scope before work starts.
Send the details. Photos, cable run lengths and your load list.
Draft 1 and Rev 2. Draft 1 lists the information we still need. Rev 2 refines the design.
Final set. Ready for you or your installer to build from.
Sample pages
These pages come from a fictional boat. Each page is marked EXAMPLE and not for construction.
EXAMPLE: system design summary 
EXAMPLE: one-line diagram 
EXAMPLE: energy budget 
EXAMPLE: parts list
FAQ
Do you need to visit my boat?
No. We work from your photos, measurements and load list. In Maine or New England, we can also come aboard.
How many rounds of changes are included?
Draft 1 lists the information we still need. Rev 2 refines the design.
What does it cost?
A fixed fee, agreed before design starts. Start your quote to get the fee for your boat.
Ready to plan your system?
Serving Maine & New England. Remote system design is available beyond that.