#RENOGY BATTERY MONITOR INSTALL INSTALL#
#RENOGY BATTERY MONITOR INSTALL MANUAL#
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Unfortunately the scenario laid out above, for a traditional Coulomb/Ah counter, is just one of the many ways these devices can become tripped up and lead to inaccurate SOC readings. Just be aware of this when you are assuming your Ah counter is accurate, in relation to your bank. This may not be half-bad but is a a decent margin away from yielding an accurate SOC.

Without an accurate 20 hour capacity figure there is no real SOC accuracy in the Ah counter, only a close-enough or hip-shoot range. To be honest I don’t know of a single boater who actually has conducted an accurate 20 hour load test.Īh / Coulomb counters rely on the actual 20 hour capacity figures being accurate, to actually remain accurate for SOC, over time. This is complicated, time consuming, and very few boaters are willing to do this. The only way to accurately know your battery capacity is to perform a constant current RC test or a physical 20 hour discharge capacity test. This can lead to slightly more bank capacity, but again this gets confusing for the average boater to understand, especially when we bring our good friend Mr. I also count on the fact the battery is being drawn at average discharge currents that are below the rated 20 hour load. On many banks it may tend to correlate marginally, but don’t expect guestimates to be perfect. These are just rough guesstimates, for most, unless you have the capability to run a true capacity test. The next year I might remove another 3% – 8% off the capacity etc. So for the 100Ah battery I might initially program it at 95Ah’s so the owner is never actually drawing to 50% SOC that first year ( self protective feature). With traditional Ah counters, a trick many of us in the industry use is to start with a slightly lower programmed Ah capacity than the bank is rated for. The new Balmar SG200 does provide a state of health figure, and works quite accurately. It is up to you, the owner, to tell it the bank capacity and program for this as accurately as you possibly can. However, they have no clue about your banks physical Ah capacity or its actual state of health. Please be aware of this.Ĭoulomb or Ah counters count Ah’s very, very accurately. These devices are not plug & play and are only as smart as you make them. This is just one example where an Ah or Coulomb counter can become inaccurate in relation to the actual battery bank. You now draw 50% of 100Ah’s out of the battery, except the battery is only really 75Ah’s and you wind up at Īctually if you threw Peukert’s exponent into the mix you may actually be lower or higher depending upon the actual load at which it was drawn. Your battery, due to age and use, is now 75Ah’s. You had 100Ah programmed into the Ah counter. Inaccurate assumptions can lead to erroneous data: If your battery monitor is still programmed for a 100 Ah capacity, and you are drawing 50% of the assumed Ah capacity out of it, based on this 100Ah rating, you are really now drawing the bank to just 33% SOC. As batteries age their capacity changes, it is an ever moving target, so the 100Ah battery you bought three years ago may now only be a 75Ah battery. The biggest problem with traditional Ah or Coulomb counters is keeping them accurate with the batteries physical condition.

#RENOGY BATTERY MONITOR INSTALL INSTALL#

When out cruising use absorption voltage.įACT: From the day you install your bank the physical Ah capacity is ever changing.

#RENOGY BATTERY MONITOR INSTALL MANUAL#

If you have been at a dock at float voltage for multiple days then it is safe to assume you are full and a manual reset is fine. NOTE: Battery voltage should be at absorption level not a float voltage when performing a manual known-full reset. Net accepted current less than 1.5% of Ah capacity = ✓.

Rule #1 for most tradittional Ah counters: Disable the “ auto-sync” feature and use manual “ known-full” re-sets. When not properly installed, and kept well calibrated, Ah counters can be horribly inaccurate… WHEN PROPERLY CALIBRATED – About 98% of Ah counters I come across are NOT properly calibrated/programmed. WHEN PROPERLY INSTALLED – About 90% of Ah Counters I come across are NOT properly installed & wired. When properly installed & properly calibrated they can extend the life of a battery bank. The battery monitor is a very useful tool for a boat-owner who has to survive on battery power. – Shop Victron Products Installing A Battery Monitor:

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#RENOGY BATTERY MONITOR INSTALL SERIES#

Everything in this article is still relevant to the current series of BMV monitors. The 602 has been replaced by the BMV-7oo series. This article features the older Victron BMV-602.

Renogy battery monitor install